Directory of Researchers

TOMIYAMA Akio
Graduate School of Engineering / Department of Mechanical Engineering
Professor
Mechanical Engineering
Last Updated :2021/01/22

Researcher Profile and Settings

Affiliation

  • <Faculty / Graduate School / Others>

    Graduate School of Engineering / Department of Mechanical Engineering
  • <Related Faculty / Graduate School / Others>

    Faculty of Engineering / Department of Mechanical Engineering, Center for Advanced Medical Engineering Research &Development (CAMED), University Libraries

Teaching

  • Graduate School of Engineering / Department of Mechanical Engineering, 2019, Analysis of Complex Thermal-Hydraulic Phenomena
  • Graduate School of Engineering / Department of Mechanical Engineering, 2019, Complex Fluid Dynamics I
  • Graduate School of Engineering / Department of Mechanical Engineering, 2019, Complex Fluid Dynamics II
  • Faculty of Engineering / Department of Mechanical Engineering, 2019, Fluid Engineering
  • Faculty of Engineering / Department of Mechanical Engineering, 2019, Special Exercises of Fluid Engineering

Research Activities

Research Interests

  • Multi-phase Flow
  • Chemical Engineering
  • Nuclear Engineering
  • Fluid Engineering

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Fluid engineering

Awards

  • Aug. 2017 日本混相流学会, 日本混相流学会「論文賞」, 鉛直管における気液対向流制限

    楠木 貴世志, 山本 泰功, 村瀬 道雄, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Others

  • Dec. 2014 15th International Topical Meeting on Nuclear Reactor Thermalhydraulics (NURETH-15), Best Paper Award, Concendation Experiments for Counter-Current Flow Limitation at Lower End of an Invertied U-Tube

    KINOSHITA TAKAYOSHI, MURASE MICHIO, FUJII YUKI, NOZUE TAKAHIRO, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    International society

  • May 2013 15th International Topical Meeting on Nuclear Reactor Thermalhydraulics (NURETH-15), Best Poster Award, Void Distribution and Bubble Motion in Bubbly Flows in a 4 X 4 Rod Bundle

    HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    The “best” poster based on the structure of the presentation (visual quality)

    International society

  • Apr. 2013 The Japan Society of Mechanical Engineers, JSME Medal for Outstanding Paper, フォトブリーチング分子タグ法による乱れエネルギ収支の評価

    MIZUMOTO HIROKI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会論文集, 77巻, 784号, B編(2011年12月)

    Japan society

  • Aug. 2005 日本混相流学会, 2004年度日本混相流学会賞 論文賞, 鉛直円管内低濃度固気二相流の乱流変調に及ぼす相間相対速度の影響

    細川 茂雄, 冨山 明男

  • Mar. 2004 日本原子力学会, 第36回日本原子力学会賞 論文賞, Shape and Rising Velocities of Single Bubble risingnthrough an Inner Subchannel

    冨山 明男, 細川 茂雄

Published Papers

  • Viscous Stress and Pressure Acting on Interface of Contaminated Drop

    HOSOKAWA SHIGEO, SHIGEKANE GAKU, HAYASHI KOSUKE, TOMIYAMA AKIO

    May 2019, 10th International Conference on Multiphase Flow (ICMF2019), 2 pages, English

    [Refereed]

    International conference proceedings

  • OSAKI SUSUMU, HAYASHI KOSUKE, KIMURA HIDEHITO, SETA TAKESHI, KOHMURA EIJI, TOMIYAMA AKIO

    May 2019, Computers & Mathematics with Applications, in press, English

    [Refereed]

    Scientific journal

  • Effects of Surfactant on Bubble Breakup at T-Junction and Characteristics of Taylor Flows in Mini and Micro Channels

    HAYASHI KOSUKE, SUZUKI DAIKI, KURIMOTO RYO, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2019, 10th International Conference on Multiphase Flow (ICMF2019), 2 pages, English

    [Refereed]

    International conference proceedings

  • Effects of Initial Liquid Height on Gas Holdup in an Air-Water Bubble Column

    KOBAYASHI NOBUYA, HASHIDA MASAAKI, HAYASHI KOSUKE, MARASHDEH QUSSAI, TOMIYAMA AKIO

    May 2019, 10th International Conference on Multiphase Flow (ICMF2019), 6 pages, English

    [Refereed]

    International conference proceedings

  • Combined Effects of Surfactant and Electrolyte on Mass Transfer from Single Carbon-Dioxide Bubbles in Vertical Pipes

    HORI YOHEI, BOTHE DIETER, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2019, 10th International Conference on Multiphase Flow (ICMF2019), 9 pages, English

    [Refereed]

    International conference proceedings

  • Characterization of Velocity Field External to Tube Bundle Using Spatial Filter Velocimetry based on Variable Meshing Scheme

    ROCHA DOUGLAS, KANIZAWA FABIO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO, RIBATSKI GHERHARDT

    May 2019, 10th International Conference on Multiphase Flow (ICMF2019), 9 pages, English

    [Refereed]

    International conference proceedings

  • HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Mar. 2019, Multiphase Science and Technology, 31 (1), 61 - 71, English

    [Refereed]

    Scientific journal

  • HASHIDA MASAAKI, HAYASHI KOSUKE, TOMIYAMA AKIO

    Feb. 2019, Internation Journal of Multiphase Flow, 111, 285 - 293, English

    [Refereed]

    Scientific journal

  • KAWABATA MASATOSHI, TSUKAGUCHI YUICHI, KANG JYUNGYU, HAYASHI KOSUKE, TOMIYAMA AKIO

    Feb. 2019, ISIJ International, 59 (2), 209 - 215, English

    [Refereed]

    Scientific journal

  • Hidehito Kimura, Kosuke Hayashi, Masaaki Taniguchi, Kohkichi Hosoda, Atsushi Fujita, Takeshi Seta, Akio Tomiyama, Eiji Kohmura

    OBJECTIVE: Cerebral aneurysm growth often precedes rupture. Definite contributors to aneurysm growth have not been determined even by means of recently developed commercially available computational fluid dynamics (CFD) software. We developed an original CFD tool that can analyze data from time-of-flight magnetic resonance angiography (TOF-MRA) before growth in the growing aneurysms and investigate possible factors for aneurysm growth in the near future. METHODS: We retrospectively reviewed unruptured aneurysms that were treated at our institute because of aneurysm growth (growing group) between April 2013 and March 2017. Stable aneurysms that had demonstrated no growth for more than 5 years were selected (stable group). TOF-MRA data of these aneurysms were retrospectively converted to 3-dimensional vessel geometric data; 3 hemodynamic indices including streamline, wall shear stress (WSS), and oscillatory shear index were calculated by our original CFD tool using the lattice Boltzmann method to quantitatively compare the 2 groups. RESULTS: Six growing aneurysms and 6 stable aneurysms were analyzed. Of the 6 growing aneurysms, WSS on the focal aneurysmal sac increased temporally in the vicinity of the constant low WSS area at the peak systolic phase. By contrast, WSS did not increase during any part of the cardiac cycle in 3 of the 6 stable aneurysms. The peak values of WSS were significantly different between the 2 groups. CONCLUSIONS: A focal increase in WSS in the peak systolic phase may be a risk factor for aneurysm enlargement in the near future.

    Feb. 2019, World neurosurgery, 122, e1439-e1448 - e1448, English, International magazine

    [Refereed]

    Scientific journal

  • Hidehito Kimura, Masaaki Taniguchi, Kosuke Hayashi, Yosuke Fujimoto, Youichi Fujita, Takashi Sasayama, Akio Tomiyama, Eiji Kohmura

    OBJECTIVE: Thin-walled regions (TIWRs) within cerebral aneurysms have a high risk of rupture during surgical manipulation. Previous reports have demonstrated specific changes in the parameters of computational fluid dynamics in TIWRs; however, they have not been fully evaluated. We identified and investigated a novel parameter, wall shear stress vector cycle variation (WSSVV), with user-friendly software that could predict TIWRs. METHODS: Twelve unruptured cerebral aneurysms were analyzed. TIWRs were defined as reddish areas compared with the normal-colored parent artery on intraoperative views. The position and orientation of these clinical images were adjusted to match the WSSVV color maps. TIWRs and thick-walled regions (TKWRs) were marked and compared with the corresponding regions on WSSVV maps. The default images obtained from WSSVV imaging required appropriate maximum color bar value (MCBV) adjustment for predicting TIWRs. Sensitivity and specificity analyses were performed by changing the MCBV from 300 to 700 at intervals of 100. With the optimal MCBV, the WSSVV values were quantitatively compared. RESULTS: All of the selected 18 TIWRs and 16 TKWRs corresponded to low- and high-value regions of the WSSVV color maps at the adjusted MCBV, respectively. The mean optimal MCBV was 483.3 ± 167.50 (range, 300-700). According to receiver operating characteristic analysis, the best MCBV for predicting TIWRs was 500 (highest sensitivity, 0.89; specificity, 0.94). Under this condition, the quantitative values of the computational fluid dynamics color maps for TIWRs and TKWRs were significantly different (P < 0.01). CONCLUSIONS: Low WSSVV values may indicate TIWRs within cerebral aneurysms.

    Jan. 2019, World neurosurgery, 121, e287-e295 - e295, English, International magazine

    [Refereed]

    Scientific journal

  • KURIMOTO RYO, HAYASHI KOSUKE, MINAGAWA HISATO, TOMIYAMA AKIO

    Dec. 2018, International Journal of Heat and Fluid Flow, 74, 28 - 35, English

    [Refereed]

    Scientific journal

  • Shohei Aoyama, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama

    Aspect ratios of ellipsoidal bubbles in clean and contaminated systems were measured to investigate the effects of surfactant on the bubble aspect ratio. The bubble diameter ranged from 0.80 to 5.8 mm. Air was used for the gas phase and the glycerol-water solutions were used for the liquid phase. The experimental ranges of the Morton number, M, the bubble Reynolds number, Re, the Eötvös number, Eo, the Weber number, We, and the Tadaki number, Ta, were as follows: 10−7 < M < 10−3, 3.6 × 10−1 < Re < 1.7 × 102, 1.1 × 10−1 < Eo < 5.9, 5.0 × 10−3 < We < 3.7 and 5.3 × 10−2 < Ta < 3.6. Triton X-100 and 1-octanol were used for surfactant. The terminal velocities of bubbles were confirmed to be independent of the surfactant concentration, and therefore, the bubbles were fully-contaminated from the point of view of the terminal velocity. By making use of the aspect ratio data, the applicability of available aspect ratio correlations was examined and an empirical correlation was proposed. The applicability of the proposed correlation was also examined for sodium dodecyl sulphate (SDS) and 1-decanol. As a result, the following conclusions were obtained: (1) the aspect ratio database, which is of use for validating and developing shape correlations, was obtained, (2) the available aspect ratio correlations are not applicable to the present data for fully-contaminated ellipsoidal bubbles, (3) the aspect ratios are well correlated in terms of a combination of the Eötvös and bubble Reynolds numbers, which proves that all the relevant forces, i.e. the viscous, inertial, buoyant and surface tension forces, should be taken into account to correlate bubble shapes, and (4) the empirical correlation of the aspect ratio developed by using the Triton X-100 and 1-octanol data also gives good evaluations for bubbles contaminated with SDS and 1-decanol in spite of largely different adsorption-desorption characteristics.

    Elsevier Inc., 01 Sep. 2018, Experimental Thermal and Fluid Science, 96, 460 - 469, English

    [Refereed]

    Scientific journal

  • Evaluation of Adsorption of Surfactant at a Moving Interface of a Single Spherical Drop

    HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    Elsevier, Sep. 2018, Experimental Thermal and Fluid Science, 96, 397 - 405, English

    [Refereed]

    Scientific journal

  • AL ISSA SULEIMAN, MURASE MICHIO, TOMIYAMA AKIO, HAYASHI KOSUKE, MACIAN-JUAN RAFAEL

    Aug. 2018, Nuclear Science and Engineering, 193, 147 - 159, English

    [Refereed][Invited]

    Scientific journal

  • Diagnostics of flow about a contaminated single drop using spatiotemporal filter velocimetry

    HOSOKAWA SHIGEO, SHIGEKANE GAKU, HAYASHI KOSUKE, TOMIYAMA AKIO

    Jul. 2018, 19th Symposium on Applications of Laser and Imaging Techniques to Fluid Mechanics, Lisbon 2016, English

    [Refereed]

    International conference proceedings

  • H. Funahashi, K. Vierow Kirkland, K. Hayashi, S. Hosokawa, A. Tomiyama

    Experiments on air–water two-phase swirling annular flows in a vertical pipe of 40 mm diameter were carried out at atmospheric pressure and room temperature to investigate interfacial and wall friction factors, fi and fw. The friction factors were evaluated using measured pressure drops and void fractions. Measurements of liquid film thickness and flow observation were also conducted. The ranges of the gas and liquid volume fluxes, JG and JL, were 12.5 ≤ JG ≤ 20.0 m/s and 0.03 ≤ JL ≤ 0.11 m/s, respectively. The main conclusions obtained are as follows: (1) fi and fw in swirling annular flows are several times larger than those in non-swirling flows, (2) fi is well correlated in terms of the liquid volume fraction and the gas Reynolds number, ReG, (3) ReG and the liquid Reynolds number, ReL, are required for correlating fw, and (4) the liquid film thicknesses in two-phase swirling flows in a one-fifth model of a BWR separator are well predicted using the two-fluid model and the correlations of fi and fw developed based on the experimental data.

    Elsevier Ltd, 15 Apr. 2018, Nuclear Engineering and Design, 330, 97 - 105, English

    [Refereed]

    Scientific journal

  • Wall and Interfacial Shear Stress of Swirling Annular Flow

    FUNAHASHI HAYATO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Apr. 2018, 8th European-Japanese Twp-Phase Flow Group Meeting, EJTPFGM-8, 1, English

    [Refereed]

    International conference proceedings

  • Numerical Simulation of a Drop in Contaminated Systems from low concentration to CMC

    HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Apr. 2018, 8th European-Japanese Twp-Phase Flow Group Meeting, EJTPFGM-8, 1, English

    [Refereed]

    International conference proceedings

  • Generation of Micro-bubbles from a heated thin wire

    HOSOKAWA SHIGEO, YOSHIDA MASATAKA, TOMIYAMA AKIO, AKITA TOMOHIRO, MAEDA YASUNARI

    Apr. 2018, 8th European-Japanese Two-Phase Flow Group Meeting, English

    [Refereed]

    International conference proceedings

  • Takashi Seta, Kosuke Hayashi, Akio Tomiyama

    We analytically and numerically investigate the boundary slip, including the velocity slip and the temperature jump, in immersed boundary-thermal lattice Boltzmann methods (IB-TLBMs) with the two-relaxation-time collision operator. We derive the theoretical equation for the relaxation parameters considering the effect of the advection velocity on the temperature jump of the IB-TLBMs. The analytical and numerical solutions demonstrate that the proposed iterative correction methods without the computational cost of the sparse matrix solver reduce the boundary slip and boundary-value deviation as effectively as the implicit correction method for any relaxation time. Because the commonly used multi-direct forcing method does not consider the contributions of the body force to the momentum flux, it cannot completely eliminate the boundary slip because of the numerical instability for a long relaxation time. Both types of proposed iterative correction methods are more numerically stable than the implicit correction method. In simulations of flow past a circular cylinder and of natural convection, the present iterative correction methods yield adequate results without the errors of the velocity slip, the temperature jump, and the boundary-value deviation for any relaxation time parameters and for any number of Lagrangian points per length. The combination of the present methods and the two-relaxation-time collision operator is suitable for simulating fluid flow with thermal convection in the multiblock method in which the relaxation time increases in inverse proportion to the grid size.

    John Wiley and Sons Ltd, 10 Mar. 2018, International Journal for Numerical Methods in Fluids, 86 (7), 454 - 490, English

    [Refereed]

    Scientific journal

  • Raito Goda, Kosuke Hayashi, Karen Vierow Kirkland, Michio Murase, Akio Tomiyama

    A semi-empirical correlation for CCFL (counter-current flow limitation) in vertical pipes was derived from one-dimensional momentum equations. Available correlations such as the empirical correlations proposed by Wallis (1969) and Zapke and Kröger (1996) can be deduced from the derived fundamental functional form of the semi-empirical correlation in limiting flow conditions. Comparisons between the semi-empirical correlation with available experimental data of CCFL taking place at the sharp-edged lower end of a vertical pipe showed that the correlation is applicable for various fluid properties and pipe diameters. The fundamental functional form of the correlation was also transformed so as to express the characteristics of CCFL occurring at the sharp-edged upper end of a vertical pipe. The present fundamental functional form of CCFL correlation is useful not only to express CCFL data but also to understand how relevant parameters play their roles in the CCFL characteristics.

    Elsevier Ltd, 01 Mar. 2018, Nuclear Engineering and Design, 328, 182 - 187, English

    [Refereed]

    Scientific journal

  • HAYASHI KOSUKE, TOMIYAMA AKIO

    Feb. 2018, International Journal of Multiphase Flow, 99, 86 - 93, English

    [Refereed]

    Scientific journal

  • Ryo Sato, Kosuke Hayashi, Akio Tomiyama

    Experiments on aeration from a bubble diffuser pipe having five aeration holes were carried out to in vestigate the effects of the azimuthal angle of the holes and liquid viscosity on flows inside and outside the pipe. The azimuthal angle was varied by rotating the pipe. When the azimuthal angle of the hole exceeded a certain angle, the liquid height inside the pipe was fixed just below the holes at any liquid viscosity, which resulted in preventing of the form ation of liquid slugs inside the pipe. Hence, uniform aeration was realized just by rotating the pipe. The downstream gas flow rates from holes were slightly higher than those upstream, which is due to the pressure recovery in the direction of the stream.

    Society of Chemical Engineers, Japan, 2018, Kagaku Kogaku Ronbunshu, 44 (1), 59 - 66, Japanese

    [Refereed]

    Scientific journal

  • Turbulent property of air-water bubbly flow in a 2X2 rod bundle

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Dec. 2017, 10th International Symposium on Measurement Techniques for Multiphase Flow (ISMTMF2017), English

    [Refereed]

    International conference proceedings

  • Yohei Hori, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama

    Mass transfer rates, k(L), of single carbon-dioxide (CO2) bubbles rising through vertical pipes filled with electrolyte aqueous solutions were measured to investigate the effects of the presence of electrolyte on k(L) Sodium chloride (NaCI) was used for electrolyte and its concentration was varied from 3.5 to 14 wt.%. The pipe diameters, D, were 12.5, 18.2 and 25.0 mm and the bubble diameter, d, ranged from 5 to 25 mm. The diameter ratio, lambda(= d/D), was varied from 0.2 to 1.7, to cover various bubble shapes, i.e. ellipsoidal, cap, semi-Taylor bubbles and Taylor bubbles. The conclusions obtained are as follows: (1) k(L) in the NaCI aqueous solutions decreases with increasing the NaCI concentration mainly due to the reduction of the diffusion coefficient of CO2 in the liquid phase, (2) the Sherwood numbers, Sh, of Taylor bubbles of L/D > 1 in the NaCI aqueous solutions can be well evaluated using the available Sherwood number correlation for clean Taylor bubbles, where L is the length of a Taylor bubble, (3) Sh of ellipsoidal, cap, semi-Taylor bubbles and Taylor bubbles of LID <= 1 in the clean water and NaCI aqueous solutions can be well correlated in terms of the Peclet number and the dimensionless bubble diameter d* = d/d(T), where d(T) is the bubble diameter at the transition from the ellipsoidal-cap bubble regime to the semi-Taylor bubble regime, and (4) the Sh correlations give good predictions for long-term bubble dissolution processes in NaCI aqueous solutions. (c) 2017 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Dec. 2017, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 115, 663 - 671, English

    [Refereed]

    Scientific journal

  • Shigeo Hosokawa, Yuya Masukura, Kosuke Hayashi, Akio Tomiyama

    Spatiotemporal filter velocimetry (SFV) was extended to Lagrangian measurements with boundary-fitted measurement areas, and was applied to flows about single spherical drops of glycerol-water solution falling in stagnant silicon oil under clean and contaminated conditions to examine its applicability to the estimation of the Marangoni stress and surfactant concentration at a moving interface. Effects of bulk concentration of surfactant on the velocity field, the Marangoni stress and the surface concentration of surfactant were discussed from the measured data. As a result, we confirmed that accurate velocity distribution in the vicinity of the interface measured by SFV enables us to evaluate interfacial velocity and interfacial shear stresses and to estimate the Marangoni stress, interfacial tension and surfactant concentration at the interface with the assumption of negligible surface viscosity. The flow inside the drop and the interfacial velocity become weak due to the Marangoni stress caused by the gradient of surfactant concentration at the interface as the bulk concentration of surfactant increases. These results demonstrate that SFV is of great use in experimental analysis of adsorption and desorption kinetics at a moving interface.

    Elsevier Ltd, 01 Dec. 2017, International Journal of Multiphase Flow, 97, 157 - 167, English

    [Refereed]

    Scientific journal

  • Evaluation of Adsorption of Surfactant at a Drop Interface using Spatiotemporal Filter Velocimetry

    HOSOKAWA SHIGEO, OKAMOTO RYOTA, HAYASHI KOSUKE, TOMIYAMA AKIO

    Dec. 2017, 10th International Symposium on Measurement Techniques for Multiphase Flow (ISMTMF2017), English

    [Refereed]

    International conference proceedings

  • Ryo Sato, Tatsuya Miyayoshi, Kosuke Hayashi, Akio Tomiyama

    Experiments on aeration from a bubble diffuser pipe having five aeration holes are carried out to investigate effects of the azimuthal angle of the holes on flows inside and outside the pipe. The azimuthal angle is varied by rotating the pipe. When the hole angle becomes larger than a certain angle, the liquid height inside the pipe is fixed just below the holes, which results in the prevention of slugging inside the pipe. The effects of hole angle on bubble generation mode and bubble size are small except for the large hole angles, at which generated bubbles are to break up due to an interaction between the bubbles and the pipe wall. Hence uniform aeration is easily realized just by rotating the pipe to some extent. Uniform aeration is also realized with a longer diffuser pipe having ten aeration holes by rotating the pipe. The power in aeration is evaluated from the pressure difference and the total gas inflow. Although the decrease in the hole diameter is also effective to realize the uniform aeration, the increase in the azimuthal angle is superior to the former from the point of view of energy saving.

    ELSEVIER SCIENCE INC, Dec. 2017, EXPERIMENTAL THERMAL AND FLUID SCIENCE, 89, 90 - 97, English

    [Refereed]

    Scientific journal

  • Spatiotemporal Flow Structure of Counter-Current Two-Phase Annular Flows

    GODA RAITO, KATSUYA MORI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Nov. 2017, ANS Winter Meeting and Nuclear Technology Expo, 2 pages, English

    [Refereed]

    International conference proceedings

  • S. Aoyama, K. Hayashi, S. Hosokawa, D. Lucas, A. Tomiyama

    Lift coefficients, C-L, of single bubbles in linear shear flows are measured to investigate effects of the bubble shape, the liquid velocity gradient and the fluid property on C-L. The range of the Morton number, M, tested is from logM = -6.6 to -3.2. The shapes of bubbles are spherical and ellipsoidal. A correlation of bubble aspect ratio for single bubbles in infinite stagnant liquids proposed in our previous study can give good evaluations for bubbles in the linear shear flows. The C-L of spherical bubbles at low bubble Reynolds numbers, Re, depend on the dimensionless shear rate Sr and Re and decrease with increasing Re. These characteristics agree with the Legendre-Magnaudet correlation. The use of a single dimensionless group such as Re, the Eotvos number, the Weber number and the Capillary number cannot correlate C-L of non-spherical bubbles. The trend of the critical Re for the reversal of the sign of C-L is the same as that for the onset of oscillation of bubble motion, which supports the mechanism proposed by Adoua et al., at least within the range of -6.6 <= logM <= -3.2. An experimental database of C-L is provided for validation of available C-L models and CFD. (C) 2017 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Nov. 2017, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 96, 113 - 122, English

    [Refereed]

    Scientific journal

  • H. Funahashi, K. Hayashi, S. Hosokawa, A. Tomiyama

    The swirler and the 1st pick-off ring (POR) of a gas-liquid separator are improved to reduce the pressure drop, DPT, in the separator while keeping the flow rate of separated liquid, WST, high. Two swirler designs are presented, i.e. V8 (swirler with eight vanes) and V6 (swirler with six vanes), whose diameters of the hubs supporting the vanes are smaller than that of the normal swirler, N8, and the nose shape of vanes are coned. The swirlers are installed into a one-fifth scale separator with three PORs. The gap width of the 1st POR is reduced to the value of the liquid film thickness in the barrel of the separator and the rear shape of the 1st POR is smoothed. The performance of the downscaled separator with the proposed swirlers and the 1st POR are evaluated under the nominal operating condition of the Hyper BWR and a higher quality condition. As a result, the following conclusions are obtained in the present experimental range: (1) DPT in the separator is reduced by 23% using V8, and V8 gives the same WST as N8, confirming that the decrease in the hub diameter and the coned-nose shape of vanes are effective, (2) V6 can realize further reduction of DPT (38%) without deteriorating the liquid-separation rate, (3) the reduced gap width of the 1st POR and a tapered shape of the downstream side of the 1st POR are also effective to decrease the pressure drop, i.e. the improved POR decreases DPT by 42% and 54% by combining with V8 and V6, respectively, and (4) the improved separators also show good performances in DPT and WST at the higher quality condition. (C) 2017 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE SA, Oct. 2017, NUCLEAR ENGINEERING AND DESIGN, 322, 360 - 367, English

    [Refereed]

    Scientific journal

  • On CCFL in Collider Test Facility: CCFL Results at PWR Hot-Leg Pipe Geometry with 190 mm Diameter

    AL ISSA SULEIMAN, MURASE MICHIO, TOMIYAMA AKIO, HAYASHI KOSUKE, MACIAN-JUAN RAFAEL

    Sep. 2017, 17th International Topical Meeting on Nuclear Reactor Thermal Hydraulics(NURETH-17), 14 pages, English

    [Refereed]

    International conference proceedings

  • Michio Murase, Yasunori Yamamoto, Takayoshi Kusunoki, Ikuo Kinoshita, Akio Tomiyama

    We previously developed a one- dimensional (1-D) computation method with parameters adjusted from CCFL (countercurrent flow limitation) data in hot leg and pressurizer surge line models to generalize the prediction method for CCFL in nearly horizontal pipes. In the 1-D computation method, the constant value for the interfacial friction coefficient of fi = 0.03 was used. On the other hand, many correlations for the interfacial friction coefficient in horizontal and inclined pipes have been proposed. In this study, therefore, we carried out 1-D computations for CCFL in nearly horizontal pipes with the diameter of D = 0.03-0.75 m and the length to diameter ratio of L/D = 4.5-63 by using some selected correlations for the interfacial friction coefficient, which are a function of the gas or liquid Reynolds number. As a result, we confirmed that the correlation of the interfacial friction coefficient in terms of the Reynolds number cannot be used for large Reynolds numbers but fi = 0.03 can be used for the wide range of diameters. To improve the correlation with the gas or liquid Reynolds number, we proposed a modified correlation. (C) 2017 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE SA, Aug. 2017, NUCLEAR ENGINEERING AND DESIGN, 320 (15), 418 - 426, English

    [Refereed]

    Scientific journal

  • 鉛直管内での気液対向流に対する界面摩擦係数

    KUSUNOKI KIYOSHI, YAMAMOTO YASUNORI, MURASE MICHIO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Jun. 2017, 混相流, 31 (1), 37 - 46, Japanese

    [Refereed]

    Scientific journal

  • 鉛直管での気液対向流制限に対する流体物性の影響

    MURASE MICHIO, KUSUNOKI KIYOSHI, YAMAMOTO YASUNORI, GODA RAITO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Jun. 2017, 混相流, 31 (2), 152 - 161, Japanese

    [Refereed]

    Scientific journal

  • Terminal Velocities of Single Bubble Rising through Stagnant Liquids and Slurry in a Hele-Shaw Cell

    HASHIDA MASAAKI, HAYASHI KOSUKE, TOMIYAMA AKIO

    Jun. 2017, 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamic (ExHFT-9), 9 pages, English

    [Refereed]

    International conference proceedings

  • Pressure Drop in Air-Water Two-Phase Flows in Horizontal U-Bends

    HAYASHI KOSUKE, SUZUKI DAIKI, MIYACHI NAOTO, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Jun. 2017, 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamic (ExHFT-9), 8 pages, English

    [Refereed]

    International conference proceedings

  • Evaluation of Adsorption of Surfactant at a Moving Interface of a Single Spherical Drop

    HOSOKAWA SHIGEO, OKAMOTO RYOTA, HAYASHI KOSUKE, TOMIYAMA AKIO

    Jun. 2017, 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamic (ExHFT-9), 10 pages, English

    [Refereed]

    International conference proceedings

  • Jiro Aoki, Yohei Hori, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama

    Mass transfer rates, k(L), of single carbon dioxide bubbles contaminated with alcohols in vertical pipes of 12.5, 18.2 and 25.0 mm diameters were measured to investigate effects of the carbon chain length of the alcohols on kL. Four straight-chain alcohols, i.e. 1-pentanol, 1-heptanol, 1-octanol and 1-decanol, were used. A wide range of bubble diameter, d, covered ellipsoidal and Taylor bubbles. Effects of the alcohol concentration, C-sol, on k(L) were also investigated to make clear the values of C-sol corresponding to fully contaminated conditions. As a result, the following conclusions were obtained. (1) The kL of bubbles contaminated with alcohols decrease with increasing C-sol, and they become constant at high C-sol, i.e. bubbles in the latter C-sol ranges are fully-contaminated from the point of view of mass transfer. On the other hand, the rising velocities decrease with increasing C-sol due to the reduction of surface tension even when k(L) are independent of Cob (2) The k(L). of ellipsoidal bubbles fully-contaminated with alcohols decrease with increasing the carbon chain length, whereas the reduction rate of kL becomes smaller and smaller as the carbon chain length increases. The k(L). of fully-contaminated ellipsoidal bubbles can be expressed by accounting for the adsorption constant of alcohol in an available kL correlation. (3) The increase in the carbon chain length also decreases k(L) of fully-contaminated Taylor bubbles, whereas the effect of carbon chain length on k(L), becomes smaller with increasing d. (C) 2017 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, May 2017, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 108 (Part B), 1991 - 2001, English

    [Refereed]

    Scientific journal

  • Effects of electrolyte on mass transfer from single carbon-dioxide bubbles in vertical pipes

    HORI YOHEI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2017, Third International Symposium on Multiscale Multiphase Process Engineering (MMPE2017), 6 pages, English

    [Refereed]

    International conference proceedings

  • Preliminary study on numerical simulations for temperature field of steam-air mixture in a circular tube with condensation

    UTANOHARA YOICHI, YAMAMOTO YASUNORI, MURASE MICHIO, MORI KATSUYA, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Apr. 2017, 2017 International Congress on Advances in Nuclear Power Plants (ICAPP 2017), English

    [Refereed]

    International conference proceedings

  • Experimental Investigation of Temperature Distribution in Condensing Steam-Air Flow in a Circular Tube

    MORI KATSUYA, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO, UTANOHARA YOICHI, YAMAMOTO YASUNORI, MURASE MICHIO

    Apr. 2017, 2017 International Congress on Advances in Nuclear Power Plants (ICAPP 2017), English

    [Refereed]

    International conference proceedings

  • Shohei Sasaki, Kengo Uchida, Kosuke Hayashi, Akio Tomiyama

    Experiments on the total gas holdup, alpha(G), in air-water cylindrical bubble columns were carried out to investigate effects of the column diameter, D-H, and the initial liquid height, H-0, on alpha(G). Ranges of D-H and H-0 were 160 <= D-H <= 2000 mm and 400 <= H-0 <= 4000 mm, respectively. The superficial gas velocity, J(G), was varied from 0.025 to 0.35 m/s. The characteristics of gas holdup showed that all the flows in the present experiments were pure heterogeneous. The following conclusions were obtained for alpha(G) in air-water bubble columns: (1) the effects of D-H and H-0 on alpha(G) are negligible when scaling up from small to large bubble columns, provided that alpha(G) in the small columns are obtained for D-H >= 200 mm and Ho 2200 mm. The height-to-diameter ratio is useless in evaluation of the critical height, above which aG does not depend on H-0, (2) for the above ranges of D-H and H-0, Akita-Yoshida's and Koide's correlations can give good evaluations of alpha(G) for a wide range of J(G) by tuning the model constants, (3) for D-H < 200 mm, the decrease in D-H increases the population of large bubbles, which results in the decrease in alpha(G), and (4) for H-0 less than or similar to 2200 mm and D-H >= 200 mm, alpha(G) at a constant J(G) decreases with increasing H-0 and approaches an asymptotic value, and the Froude number using J(G) and H-0 as the characteristic scales well correlates alpha(G) in this regime. (C) 2016 Elsevier Inc. All rights reserved.

    ELSEVIER SCIENCE INC, Apr. 2017, EXPERIMENTAL THERMAL AND FLUID SCIENCE, 82, 359 - 366, English

    [Refereed]

    Scientific journal

  • Interfacial Friction Factor for Counter-Current Gas-Liquid Flows in Vertical Pipes

    KUSUNOKI TAKAYOSHI, YAMAMOTO YASUNORI, MURASE MICHIO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本混相流学会, Mar. 2017, 混相流, 31 (1), 37 - 46, Japanese

    [Refereed]

    Scientific journal

  • Michio Murase, Yoichi Utanohara, Takayoshi Kusunoki, Yasunori Yamamoto, Dirk Lucas, Akio Tomiyama

    We proposed prediction methods for countercurrent flow limitation (CCFL) in horizontal and slightly inclined pipes with one- dimensional (1- D) computations and uncertainty of computed CCFL. In this study, we applied the proposed methods to a full-scale pressurizer surge line [ inclination angle theta = 0.6 deg, diameter D = 300 mm, and ratio of the length to the diameter (L/D) = 63] in a specific pressurized water reactor, performed 1-D computations and three-dimensional (3-D) numerical simulations, and found that uncertainties caused by effects of the diameter and fluid properties on CCFL were small. We also applied the proposed methods to experiments for hot-leg and surge line models (theta = 0 and 0.6 deg, D = 0.03 to 0.65 m, and L/D = 4.5 to 63) to generalize them, performed 1-D computations, and found that uncertainties caused by effects of theta and L on CCFL were large due to the setting error for theta and differences among experiments. This shows that a small-scale air-water experiment with the same theta and L/D as those in an actual plant is effective to reduce the uncertainty of CCFL prediction.

    AMER NUCLEAR SOC, Feb. 2017, NUCLEAR TECHNOLOGY, 197 (2), 140 - 157, English

    [Refereed]

    Scientific journal

  • 鉛直管内における気液対向流制限

    YAMAMOTO YASUNORI, MURASE MICHIO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Dec. 2016, 混相流, 30 (4), 392 - 401, Japanese

    [Refereed]

    Scientific journal

  • H. Funahashi, K. Hayashi, S. Hosokawa, A. Tomiyama

    Experiments on air-water two-phase swirling flows in a one-fifth scale model of a steam separator with three pick-off rings (PORs) are carried out to investigate characteristics of two-phase swirling flows and separator performance. In addition to flow observation, liquid film thickness, flow rates of separated liquid and pressure drops are measured. The ranges of the gas and liquid volume fluxes, J(G) and J(L), tested are 12.0 <= J(G) <= 17.8 m/s and 0.05 <= J(L) <= 0.11 m/s, respectively. The main conclusions obtained are as follows: (1) the liquid film thicknesses at the PORs are smaller than the gap widths of the PORs under the nominal operating condition, which results in a high liquid-separation rate, (2) the increase in J(G) decreases the flow rate of unseparated liquid, whereas the flow rate of unseparated liquid is independent of J(L) except for low J(G) conditions, under which the liquid film thicknesses at the 2nd and 3rd PORs tend to be larger than the gap widths of PORs, (3) the presence of the 2nd and 3rd PORs realizes high liquid-separation rates by capturing the liquid unseparated at the 1st POR and the pressure drops at the 2nd and 3rd PORs are much smaller than that at the 1st POR, and (4) the pressure drops at the swirler and the 1st POR, which are the main source of the pressure drop of the separator under the nominal operating condition, increase with J(G), whereas J(L) increases only the latter. (C) 2016 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE SA, Nov. 2016, NUCLEAR ENGINEERING AND DESIGN, 308, 205 - 213, English

    [Refereed]

    Scientific journal

  • A Semi-Empirical Correlation for Counter-Current Flow Limitation in a Vertical Pipe

    MORI KATSUYA, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Nov. 2016, ANS Conference 2016 Winter Meeting and Nuclear Technology Expo, 3 pages, English

    [Refereed]

    International conference proceedings

  • Shohei Sasaki, Kengo Uchida, Kosuke Hayashi, Akio Tomiyama

    Total gas holdups alpha(G) in a cylindrical slurry bubble column were measured at various values of the superficial gas velocity J(G), the mean particle volumetric concentration C-S and the initial slurry height H-0 to investigate their effects on alpha(G). The column diameter D-H and height were 200 mm and 2000 mm, respectively. The gas, liquid and solid phases were air, water and hydrophilic silica particles of 100 mu m in mean diameter, respectively. Experimental conditions were 0.025 <= J(G) <= 0.40 m/s, 0 <= C-S <= 0.50 and 1.5 <= H-0* <= 5.0, where H-0* = H-0/D-H. The conclusions obtained are as follows: (1) alpha(G) decreases with increasing H0 and becomes independent of H-0 for H-0* > 4 at low J(G), whereas it depends on H-0 at higher J(G) even for H-0* > 4, (2) the increase in C-S decreases alpha(G) up to C-S similar to 0.40, whereas alpha(G) becomes independent of C-S at larger C-S, and (3) alpha(G) in the slurry bubble column at various C-S, H-0 and J(G) are well correlated in terms of the Froude number Fr-H using H-0 as a characteristic length.

    SOC CHEMICAL ENG JAPAN, Sep. 2016, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 49 (9), 824 - 830, English

    [Refereed]

    Scientific journal

  • 時空間フィルタ流速計(SFV)を用いた混相流の速度分布計測

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    化学工学会, Aug. 2016, 化学工学, Vol. 80 (No. 8), pp. 488 - 491, Japanese

    [Invited]

    Scientific journal

  • Effect of Bubbles on Turblence Kinetic Energy Budget in Vertical Duct flow

    HOSOKAWA SHIGEO, KARASAWA HIROKI, IWAI RYOSUKE, TOMIYAMA AKIO

    Jul. 2016, 18th Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon 2016, English

    [Refereed]

    International conference proceedings

  • MURAKAMI HIROKI, ISHIBASHI AKIRA, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    The Japan Society of Mechanical Engineers, Jun. 2016, Transactions of the JSME, Vol. 82 (No. 838), 15 - 00685, Japanese

    [Refereed]

    Scientific journal

  • Shigeo Hosokawa, Shudai Fujimoto, Akio Tomiyama

    Improvement of efficiency of a gaslift pump is required for lifting submarine resources economically. We propose a gaslift pump utilizing phase change of working fluid to improve the efficiency by avoiding air compression. A working fluid, which has a boiling point lower than surrounding temperature, is supplied as liquid to an evaporator near the bottom of a riser pipe through an adiabatic pipe. The working fluid boils at the evaporator due to heating from the surrounding liquid. The generated gas is injected into the riser pipe instead of compressed air and forms gas-liquid two-phase flow, by which the water is drawn from the bottom opening of the riser pipe. The working fluid is separated from the drawn water at the top of the pipe, and it flows into a cooler to supply the condensed liquid into the adiabatic pipe again. This pump needs the energy only to cool the working fluid, i.e. no energy is required for compressing gas. The feasibility of the pump is confirmed through the experiments using a prototype gaslift pump using a hydro-fluorocarbon as the working fluid. Prediction of the flow rate of drawn water is also carried out. (C) 2016 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Jun. 2016, APPLIED THERMAL ENGINEERING, 103, 1119 - 1125, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Surfactant Concentration at an Interface of Single Spherical Drop

    HAYASHI KOSUKE, MASUKURA YUYA, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2016, 9th International Conference on Multiphase Flow, No. 262, 6 pages, English

    [Refereed]

    International conference proceedings

  • Mass Transfer from Single Carbon Dioxide Bubbles in Water-Alchol Solutions in a Verical Pipe

    HORI YOHEI, AOKI JIRO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2016, 9th International Conference on Multiphase Flow, No. 245, 6 pages, English

    [Refereed]

    International conference proceedings

  • Lift Force Acting on Single Bubbles in Linear Shear Flows

    AOYAMA SHOHEI, ZUN IZTOK, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2016, 9th International Conference on Multiphase Flow, No. 333, 6 pages, English

    [Refereed]

    International conference proceedings

  • Experimental Evaluation of Surfacant Concentration at an Interface of Single Spherical Drop

    HOSOKAWA SHIGEO, MASUKURA YUYA, HAYASHI KOSUKE, TOMIYAMA AKIO

    May 2016, 9th International Conference on Multiphase Flow, No. 262, 6 pages, English

    [Refereed]

    International conference proceedings

  • Effects of Azimuthal Angle of Aeration Holes on Flows inside and outside a Bubble Diffuser Pipe

    SATO RYO, MIYAYOSHI TATSUYA, HAYASHI KOSUKE, TOMIYAMA AKIO

    May 2016, 9th International Conference on Multiphase Flow, No. 168, 6 pages, English

    [Refereed]

    International conference proceedings

  • Takayoshi Kusunoki, Takahiro Nozue, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama, Michio Murase

    In this study, we measured counter-current flow limitation (CCFL) characteristics in an inverted U-tube (18.4 mm diameter and 1.0 m straight-part length) simulating steam generator (SG) U-tubes under conditions of steam condensation at pressures of 0.1-0.14 MPa. Differential pressure P between the top of the inverted U-tube and the lower tank was measured, and the flow patterns wave estimated by comparing the waveforms of P with those in air-water experiments. As a result, we classified the flow patterns under CCFL conditions into CCFL-P, CCFL-L and CCFL-T. The falling water flow rate under CCFL conditions slightly increased as the pressure increased and the cooling water temperature decreased (subcooling of cooling water increased). In the case of CCFL-L, CCFL characteristics in the inverted U-tube were between those in air-water and saturated steam-water experiments at 0.1 MPa. Furthermore, we derived a Wallis type CCFL correlation and its uncertainty from CCFL data, including previously measured data, i.e., J*(1/2)(G) + 0.88J(L)*(1/2) = 0.76 +/- 0.05.

    TAYLOR & FRANCIS LTD, Apr. 2016, JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 53 (4), 486 - 495, English

    [Refereed]

    Scientific journal

  • Shohei Sasaki, Kosuke Hayashi, Akio Tomiyama

    Effects of the initial liquid height, H-0, of air-water bubble columns on the total gas holdup, alpha(G), were investigated in this study. Systematic databases of alpha(G) in a rectangular and a cylindrical column of the hydraulic diameter DH of 200 mm were obtained. An image processing method was applied to highspeed video images of the liquid height to obtain accurate gas holdup data. Ranges of the superficial gas velocity, J(G), and the dimensionless liquid height, H-0* (= H-0/D-H), were 0.025 <= J(G) <= 0.40 m/s and 1.5 <= H-0(*) <= 5.0, respectively. The bubbly flows observed in these ranges could be classified into either the heterogeneous bubbly flow consisting of bubbles much smaller than D-H or that with huge bubbles of the column-width scale. The main parameter governing the flow regime transition was J(G). The gradient, d(alpha G)/d(JG), of alpha(G) with respect to J(G) was of use in flow regime identification. The increase in H-0* decreased alpha(G) because a long bubble residence time at a high lit) leads to the increase in the mean bubble diameter due to bubble coalescence. The Froude number using H-0. as a characteristic length well correlates alpha(G) at various H-0 An empirical correlation of alpha(G) in terms of the Froude number was then proposed. Comparing the correlation with the alpha(G) data showed that the correlation can give good evaluations of alpha(G) in the rectangular and cylindrical columns by tuning model parameters. (C) 2015 Elsevier Inc. All rights reserved.

    ELSEVIER SCIENCE INC, Apr. 2016, EXPERIMENTAL THERMAL AND FLUID SCIENCE, 72, 67 - 74, English

    [Refereed]

    Scientific journal

  • Development of a High-Efficiency Gas-Liquid Separator for Room Air Conditioner

    MURAKAMI HIROKI, MAKINO HIROAKI, HAYAMARU YASUHIDE, SAITOU TADASHI, NAGAI HIRONORI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    THE JAPANESE SOCIETY FOR MULTIPHASE FLOW, Mar. 2016, JAPANESE JOURNAL OF MULTIPHASE FLOW, Vol. 30 (No. 1), pp. 49 - 56, Japanese

    [Refereed]

    Scientific journal

  • S. Aoyama, K. Hayashi, S. Hosokawa, A. Tomiyama

    Aspect ratios E of ellipsoidal bubbles in infinite stagnant clean liquids are measured for log M = -6.6, -5.5, -4.9 and -3.9, where M is the Morton number. An empirical correlation of E applicable to a wide range of the Morton number is proposed by making use of the present data and Sugihara's data at log M = -11 (2007). The aspect ratio in this correlation is expressed in terms of the combination of the Eotvos number and the bubble Reynolds number to account for the effects of the inertial, viscous, buoyant and surface tension forces on E. Terminal velocities of ellipsoidal bubbles are accurately predicted by using the proposed correlation and a drag correlation proposed by Rastello et al. (2011). (C) 2015 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2016, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 79, 23 - 30, English

    [Refereed]

    Scientific journal

  • Effects of Liquid-Separation Components on Separation Performance of a Steam Separator

    KATONO KENICHI, TAMARU HAYATO, HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    Dec. 2015, Japanese journal of Multiphase Flow, 29 (4), 343 - 350, Japanese

    [Refereed]

    Scientific journal

  • Two-Phase Swirling Flow in a Gas-Liquid Separator

    FUNAHASHI HAYATO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Nov. 2015, ANS Conference 2015 Winter Meeting and Nuclear Technology Expo, 2 pages, English

    [Refereed]

    International conference proceedings

  • Sven Kastens, Shogo Hosoda, Michael Schlueter, Akio Tomiyama

    Mass transfer from single CO2 Taylor bubbles in vertical minichannels was measured for various channel hydraulic diameters D-h. The effects of channel geometries on the mass transfer were also investigated by using square ducts and circular pipes. Bubble rising velocities, v(B), in the ducts were much faster than those in the pipes due to large liquid flow areas in the corners of the ducts. The values of mass transfer coefficients in the pipes were almost the same as those in the ducts, in spite of a large difference in v(B). Sherwood numbers, Sh(D), using D-h as a characteristic length, are well-correlated in terms of the Eotvos number. The proposed Sh(D) correlation can well predict a long-term dissolution process of a Taylor bubble.

    WILEY-V C H VERLAG GMBH, Nov. 2015, CHEMICAL ENGINEERING & TECHNOLOGY, 38 (11), 1925 - 1932, English

    [Refereed][Invited]

    Scientific journal

  • Jiro Aoki, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama

    Mass transfer from single fully contaminated carbon dioxide bubbles rising through vertical pipes was measured to investigate the effects of surfactants. The diameter ratio of the bubble diameter to the pipe diameter was varied to cover various bubble shapes from ellipsoidal to Taylor bubbles. Triton X-100 and 1-octanol served as surfactants. The mass transfer rates, k(L), of contaminated bubbles in the ellipsoidal regime were smaller than those of clean bubbles due to the interface immobilization. The k(L) of Taylor bubbles contaminated with Triton X-100 and 1-octanol showed varying trends because of the difference in the surfactant distributions at the bubble interfaces which strongly depend on the Hatta number. The Sherwood numbers of contaminated bubbles were well correlated by introducing the bubble diameter, at which the bubble shape transits from ellipsoidal to Taylor bubbles.

    WILEY-V C H VERLAG GMBH, Nov. 2015, CHEMICAL ENGINEERING & TECHNOLOGY, 38 (11), 1955 - 1964, English

    [Refereed][Invited]

    Scientific journal

  • Michio Murase, Ikuo Kinoshita, Takayoshi Kusunoki, Dirk Lucas, Akio Tomiyama

    One-dimensional (1D) sensitivity computations were carried out for air–water countercurrent flows in a 1=15-scale model of the hot leg and a 1=10-scale model of the pressurizer surge line in a pressurized water reactor (PWR) to generalize the prediction method for countercurrent flow limitation (CCFL) characteristics in slightly inclined pipes with elbows. In the 1D model, the wall friction coefficient fwG of single-phase gas flows was used. The interfacial drag coefficient of fi ¼ 0.03, an appropriate adjustment factor of NwL ¼ 6 for the wall friction coefficient fwL of single-phase liquid flows (NwG ¼ 1 for fwG of single-phase gas flows), and an appropriate adjustment factor of Nde ¼ 6 for the pressure loss coefficient ζe of elbows in single-phase flows were determined to give good agreement between the computed and measured CCFL characteristics. The adjusted factors were used to compute and then discuss effects of the inclination angle and diameter on CCFL characteristics.

    American Society of Mechanical Engineers (ASME), 01 Oct. 2015, Journal of Nuclear Engineering and Radiation Science, 1 (4), 041009, 9 pages, English

    [Refereed]

    Scientific journal

  • Evaluation of Interfacial Shear Stress of Single Drop Using Spatiotemporal Filter Velocimetry

    HOSOKAWA SHIGEO, MASUKURA Yuya, HAYASHI KOSUKE, TOMIYAMA AKIO

    Oct. 2015, 7th European-Japanese Two-Phase Flow Group Meeting, 3 pages, English

    [Refereed]

    International conference proceedings

  • Effects of Subcooling on Sound Generation by Vapor Bubbles in Water

    HAYASHI KOSUKE, TATEYAMA MASAYA, IKEUCHI KAZUTAKA, HOSOKAWA SHIGEO, TOMIYAMA AKIO, HIROTSU MAKOTO, TAKEDA NOBUHIRO

    Oct. 2015, 7th European-Japanese Two-Phase Flow Group Meeting, 9 pages, English

    [Refereed][Invited]

    International conference proceedings

  • Generation of submicron bubbles in a pressurized dissolution method

    HOSOKAWA SHIGEO, BABA YUJI, TOMIYAMA AKIO, MAEDA YASUNARI, ITO YOSHIHIRO

    Sep. 2015, 9th International Symposium on Measurement Techniques for Multiphase Flows, ISTMF2015, English

    [Refereed]

    International conference proceedings

  • Ryo Sato, Kosuke Hayashi, Akio Tomiyama

    Effects of liquid viscosity on flows inside and outside a bubble diffuser pipe were investigated in this study. Glycerol-Water solutions and air were used for the liquid and gas phases, respectively. A circular pipe having five aeration holes on the topside and larger opening on the bottom side was placed in a rectangular water tank. The pipe diameter was 20 mm and the hole diameter was 5 mm. The liquid viscosity mu(L) ranged from 1 to 100 mPa s and the total gas flow rate Q(IN) ranged from 3 x 10(-4) to 7 x 10(-4) m(3)/s. The flows inside and outside the pipe were observed using a high-speed video camera and the gas flow rates from each aeration hole were measured by capturing bubbles generated from each hole. The liquid entered into the pipe through the aeration hole and the opening, resulting in wavy flow pattern with intermittent slugging. The conclusiohs obtained are as follows: (1) the increases in Q(IN) and mu(L) decrease the frequency of slugging disturbing aeration, so that the gas flow rate from each hole becomes uniform at high Q(IN) and mu(L), (2) the main triggers of slugging are interfacial waves at low mu(L) and interface deformation caused by liquid drops falling from the aeration holes into the pipe at high mu(L), (3) a slugging criterion for inviscid fluids proposed by Mishima and Ishii (1980) is applicable not only to low mu(L) liquids but also to high mu(L) liquids because the wave growth rate is much larger than the viscous damping rate even at high viscosities tested in the present experiments, and (4) the Davidson-Schuler correlation (Davidson and Schuler, 1960) gives reasonable estimations of the bubble diameter not only for low viscosity liquids but also for high viscosity liquids, provided that the influence of slugging is small. (C) 2015 Elsevier Inc. All rights reserved.

    ELSEVIER SCIENCE INC, Sep. 2015, EXPERIMENTAL THERMAL AND FLUID SCIENCE, 66, 197 - 205, English

    [Refereed]

    Scientific journal

  • Effects of Liquid Height on Gas Holdup in a Rectangular Bubble Column

    SASAKI SHOHEI, HAYASHI KOSUKE, TOMIYAMA AKIO

    Sep. 2015, 9th International Symposium on Measurement Techniques for Multiphase Flow, 2 pages, English

    [Refereed]

    International conference proceedings

  • Motion of Contaminated Drops Falling onto Flat Plate

    HAYASHI KOSUKE, KITANO MASAAKI, DHAR ABHINAV, TOMIYAMA AKIO

    Jul. 2015, ASME-JSME-KSME Joint Fluids Engineering Conference 2015 (AJK2015-FED), AJK2015 - 21048, 2 pages, English

    [Refereed]

    International conference proceedings

  • Airlift Pump making use of Phase Change of Working Fluid

    HOSOKAWA SHIGEO, FUJIMOTO SHUDAI, TOMIYAMA AKIO

    Jul. 2015, ASME-JSME-KSME Joint Fluid Engineering Conference 2015 (AJK 2015), English

    [Refereed]

    International conference proceedings

  • Takayoshi Kusunoki, Michio Murase, Yuki Fujii, Takahiro Nozue, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama

    The purpose of this study is to derive a counter-current flow limitation (CCFL) correlation and evaluate its uncertainty for steam generator (SG) U-tubes in a pressurized water reactor (PWR). Experiments were conducted to evaluate effects of the liquid viscosity on CCFL characteristics using air-40wt% or air-60wt% glycerol water solution and saturated steam-water at atmospheric pressure with vertical pipes simulating the lower part of the SG U-tubes. The steam-water experiments confirmed that CCFL characteristics could be expressed in terms of the Wallis parameters (J(G)* and J(L)*) for the pipe diameters of D = 14, 20, and 27mm. A CCFL correlation was derived using the ratio mu(G)/mu(L) of the viscosities of the gas and liquid phases, mu(G) and mu(L), as a correction term representing effects of fluid properties, where J(G)(*1/2)(mu(G)/mu(L))(-0.07) was expressed by a cubic function of J(L)(*1/2)(mu(G)/mu(L))(0.1). In the correlation, the constant C indicating the value of J(G)(*1/2)(mu(G)/mu(L))(-0.07) at J(L)* = 0 was (1.04 +/- 0.05), and this uncertainty of +/- 0.05 would cover most of the previous experimental data including the ROSA-IV/LSTF data at 1, 3, and 7 MPa.

    TAYLOR & FRANCIS LTD, Jun. 2015, JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 52 (6), 887 - 896, English

    [Refereed]

    Scientific journal

  • Dissolution of Single Carbon Dioxide Bubbles in Glycerol-Water Solution

    HOSODA SHOGO, TRYGGVASON GRETAR, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Jun. 2015, Journal of Chemical Engineering of Japan, Vol. 48 (No. 6), pp. 418 - 426, English

    [Refereed]

    Scientific journal

  • Implicit Temperature-Correction-based Immersed-Boundary Thermal Lattice-Boltzmann Method with Two Relaxation Times

    SETA TAKESHI, HAYASHI KOSUKE, TOMIYAMA AKIO

    May 2015, 23th International Conference on Nuclear Engineering (ICONE23), 10 pages, ICONE23 - 1039, English

    [Refereed]

    International conference proceedings

  • Gaslift Pump making use of Phase Change of Working Fluid

    HOSOKAWA SHIGEO, FUJIMOTO SHUDAI, TOMIYAMA AKIO

    May 2015, Japan-U.S. Seminar on Two-phase Flow Dynamics, English

    [Refereed]

    International conference proceedings

  • Mass Transfer from Single Carbon Dioxide Bubbles in Contaminated Water in a Vertical Pipe

    AOKI JIRO, HAYASHI KOSUKE, TOMIYAMA AKIO

    Apr. 2015, International Journal of Heat and Mass Transfer, 83, 652–658, English

    [Refereed]

    Scientific journal

  • Shimpei Ojima, Shohei Sasaki, Kosuke Hayashi, Akio Tomiyama

    The time, t(C), elapsed from bubble contact to the rupture of the liquid film between two bubbles in a quasi two-dimensional column was measured to investigate the effects of the particle diameter on bubble coalescence. The particle diameter ranged from 60 to 150 mu m and the particle volumetric concentration ranged from 0 to 0.50 (50%). The effects of particle diameter on bubble coalescence were evaluated through the experiments and were implemented into a bubble lcoalescence model for a multi-fluid model. Distributions of the gas holdup in a three-dimensional slurry bubble column were also measured using an electrical conductivity probe to obtain experimental data for validation of the coalescence model. The conclusions obtained are as follows: (1) t(C) decreases, in other words, bubble coalescence is enhanced with decreasing the particle diameter, which results in the reduction of the gas holdup of the slurry bubble column, (2) the particle-effect multiplier to t(C) is of great use to take into account the effects of the particle concentration and diameter in multi-fluid simulations of slurry bubble columns, and (3) the interaction between the bubble interfaces and particles in the bubble coalescence process after bubble contact is a local phenomenon and rarely depends on the macroscopic behavior of the interface, which allows us to develop a correlation for particle-induced enhancement of bubble coalescence for three-dimensional bubble columns even with a small experimental setup like a Hele-Shaw cell.

    SOC CHEMICAL ENG JAPAN, Mar. 2015, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 48 (3), 181 - 189, English

    [Refereed]

    Scientific journal

  • Abhinav Dhar, Naoki Shimada, Kosuke Hayashi, Akio Tomiyama

    Effects of numerical treatments for the surface tension evaluation on predictions of the motions of droplets ranging from micron to sub-micron meters were investigated. Various combinations of schemes for evaluating the normal to the interface and interface curvature were examined, i.e. the ALE (arbitrary Lagrangian-Eulerian) like scheme and BFA (balanced-force algorithm) for the normal vector and CSF (continuum surface force) and HF (height function) for the interface curvature. The interface motion was predicted using THAINC (tangent of hyperbola with adaptive slope for interface capturing) proposed in our previous study. Numerical errors in pressure and velocity were examined for neutrally buoyant drops of 1 mm in radius to validate the code, which confirmed that the results were similar to those reported in literature: the combination of BFA and HF gave the lowest errors. The droplet size was reduced to 0.1 μm to investigate the accuracy of the schemes for droplet sizes found in industrial coating processes. The static contact angle was then taken into account in the code. The effect of implementation on the errors was examined. The reduction of droplet sizes and implementation of contact angle had no substantial effect on the order of errors. A model for the dynamic contact angle was also implemented and the wetting behaviour of a drop of 1.14 mm in radius was well predicted. Finally a simulation of the wetting behaviour of a sub-micron meter droplet demonstrated that the present code combining BFA, HF and the dynamic contact angle model is accurate in predicting the motion of sub-micron meter droplets.

    Multi-Science Publishing Co. Ltd, 01 Mar. 2015, Journal of Computational Multiphase Flows, 7 (1), 15 - 32, English

    [Refereed]

    Scientific journal

  • 時空間フィルタ流速計を用いた流路内速度分布及び流量の測定

    KITAHATA KYOSUKEYO, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会, Feb. 2015, 日本機械学会論文集, 81 (822), 14 - 00597, Japanese

    [Refereed]

    Scientific journal

  • Yasunari Maeda, Shigeo Hosokawa, Yuji Baba, Akio Tomiyama, Yoshihiro Ito

    Micro-bubbles are in use in many industrial fields such as water treatment, purification of lake water, chemical engineering, washing processes and housing equipment by virtues of their large interfacial area concentration and long residence time in liquid. A pressurized dissolution method based on decompression of liquid with dissolved gas is one of promising methods for generating fine micro-bubbles at high number density. Since the mechanism of micro-bubble generation is not clarified yet, design and improvement of micro-bubble generators are based on trial and error. In this study, effects of liquid volume flux at a decompression nozzle and dissolved gas concentration in the upstream region of the nozzle on diameter and number density of generated micro-bubbles are examined to understand generation mechanism of micro-bubbles in a pressurized dissolution method. The diameter and the number density of micro-bubbles are measured by using phase Doppler anemometry (PDA) in the downstream region of the nozzle, and the flow patterns in the nozzle are visualized by using a high-speed camera. The experimental results show that diameter and number density of generated micro-bubbles depend on cavitation pattern at the nozzle, and that cavitation bubbles containing not only vapor but also non-condensable gas become micro-bubbles due to their shrink caused by condensation of the vapor in the downstream region of the nozzle. (C) 2014 Elsevier Inc. All rights reserved.

    ELSEVIER SCIENCE INC, Jan. 2015, EXPERIMENTAL THERMAL AND FLUID SCIENCE, 60, 201 - 207, English

    [Refereed]

    Scientific journal

  • Kosuke Hayashi, Masaya Tateyama, Kazutaka Ikeuchi, Shigeo Hosokawa, Akio Tomiyama, Makoto Hirotsu, Nobuhiro Takeda

    Sound generated by vapor bubbles condensing in subcooled water was measured to investigate effects of the degree, ΔT, of subcooling. Saturated steam from a boiler was injected into a horizontal water pipe flow through an orifice of 1 mm in diameter. The duct diameter was 16 mm and the Reynolds number of water was about 5 × 104. The subcooling was varied from 10 to 40 K. The sound level increased with increasing ΔT for ΔT ≤ 20 K, whereas it was independent of ΔT at higher ΔT. Video images of condensing bubbles revealed that the interfacial velocity of a condensing bubble had the same trend as that of the sound level, and therefore, the interfacial velocity in condensation is the key in the sound level. The rapid condensation at high ΔT induced emission of microbubbles and secondary pressure pulse generation. The latter also contributes to the increase in the sound level.

    Begell House Inc., 2015, Multiphase Science and Technology, 27 (1), 67 - 75, English

    [Refereed]

    Scientific journal

  • Shimpei Ojima, Kosuke Hayashi, Shigeo Hosokawa, Akio Tomiyama

    Multi-fluid simulations of heterogeneous bubbly flows in an air-water bubble column were carried out to verify the speculation that a heterogeneous bubbly flow is predictable without turbulence models such as k-epsilon and LES models, provided that the velocity fluctuation caused by large-scale vortical flow structures prevails over the bubble-induced and shear-induced turbulences. Experiments on the heterogeneous air-water bubbly flows in a rectangular bubble column were also carried out to obtain experimental data of the mean velocity, fluctuation velocity and void fraction for validation of the numerical method. A small LDV probe developed in our previous study was utilized to measure the liquid velocity in the column at high spatial and high temporal resolutions. The distribution of void fraction was measured using an electrical conductivity probe. The conclusions obtained under the present experimental conditions are as follows: (1) the small LDV probe is of great use in measuring the distributions of mean and fluctuation velocities of the liquid phase at high spatial and high temporal resolutions, (2) the velocity fluctuation in the heterogeneous regime in the bubble column is mainly due to large-scale vortical structures, and (3) the multi-fluid model can give good predictions of a heterogeneous bubbly flow without using the turbulence models, provided that large-scale vortical structures in the flow prevail over the bubble-induced and shear-induced turbulences. (C) 2014 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Dec. 2014, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 67, 111 - 121, English

    [Refereed]

    Scientific journal

  • Condensation Experiments for Counter-current Flow Limitation at Lower End of an Inverted U-Tube

    KINOSHITA TAKAYOSHI, MURASE MICHIO, FUJII YUKI, NOZUE TAKAHIRO, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Dec. 2014, 10th International Topical Meeting on Nuclear Thermal Hydraulics, Operation and Safety (NUTHOS-10), USB, English

    [Refereed]

    International conference proceedings

  • Akira Sou, Baris Bicer, Akio Tomiyama

    Cavitation clouds shedding in a nozzle of fuel injector for Diesel Engines play a dominant role in the fuel spray atomization process and the subsequent spray combustion. Since a high speed cavitation flow in a tiny nozzle with a complicated geometry is not easy to be visualized and measured, large efforts have been paid to carry out numerical simulations of the transient cavitating flow in the nozzle. Most of the previous simulations are based on the Homogeneous Equilibrium Model (HEM), a simplified bubble dynamics model or a barotropic equation, and the Reynolds-Averaged Navier-Stokes (RANS) turbulence model, which do not predict the cavitation cloud shedding. Cavitation in the nozzle takes various forms, such as a transparent cavitation sheet and clouds of cavitation bubbles, which makes its prediction difficult. As a first step to develop a cavitation model which can accurately treat both the sheet and cloud cavitations, in this study we propose a new combination of Large Eddy Simulation (LES), Eulerian-Lagrangian Bubble Tracking Method (BTM), and the Rayleigh-Plesset (RP) equation to simulate an incipient cavitation, in which only cavitation bubble clouds appear. A precursor simulation of a fully developed turbulent flow in a channel, in which periodic boundary condition is adopted for the inlet and exit, is carried out to generate inlet boundary condition for a nozzle simulation. To verify the validity of the model, transient cavitation motion and turbulent velocity in a rectangular nozzle are acquired by using a high speed camera and Laser Doppler Velocimetry (LDV). As a result, a recirculation flow and a cavitation cloud shedding are accurately predicted by LES using a fine grid, and the RP equation for all nuclei tracked in a Lagrangian manner. (C) 2014 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Nov. 2014, COMPUTERS & FLUIDS, 103, 42 - 48, English

    [Refereed]

    Scientific journal

  • Liquid Velocity Distribution in Turbulent Bubbly Flow in a 2x2 Rod Bundle

    HOSOKAWA SHIGEO, OGAWA YUUMA, TOMIYAMA AKIO

    Nov. 2014, 9th Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS 9), USB, English

    [Refereed]

    International conference proceedings

  • CCFL of Steam-Condensate Two-Phase Flow in a U-Tube

    NOZUE TAKAHIRO, FUJII YUKI, MURASE MICHIO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Nov. 2014, ANS Conference 2014 Winter Meeting and Nuclear Technology Expo, CD-ROM, 2 pages, English

    [Refereed]

    International conference proceedings

  • Numerical simulation of slug generation at a v-shaped elbow between inclined pipes

    IRIKURA MOTOKI, MAEKAWA MUNENORI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Sep. 2014, 13th International Conference on Multiphase Flow in Industrial Plant (MFIP2014), English

    [Refereed]

    International conference proceedings

  • Mass Transfer from Single Taylor Bubbles in a Mini Channel

    KASTENS Sven, HOSODA Shogo, SCHLUTER Michael, TOMIYAMA AKIO

    Sep. 2014, Proc. 2nd International Symposium on Multiscale Multiphase Process Engineering, pp. 30 - 35, English

    [Refereed]

    International conference proceedings

  • Effects of Surfactant on Mass Transfer from Single Carbon Dioxide Bubbles in Vertical Pipes

    AOKI JIRO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Sep. 2014, Proc. 2nd International Symposium on Multiscale Multiphase Process Engineering, pp. 94 - 99, English

    [Refereed]

    International conference proceedings

  • Effects of Height-To-Diameter Ratio on Gas Holdup in a Slurry Bubble Column

    SASAKI SHOHEI, OJIMA SHIMPEI, HAYASHI KOSUKE, TOMIYAMA AKIO

    Sep. 2014, Proc. 2nd International Symposium on Multiscale Multiphase Process Engineering, pp. 230 - 235, English

    [Refereed]

    International conference proceedings

  • An Interface Capturing Scheme for Free-Surface Flows in a Flow Channel Consisting of Solid Obstacles

    SHIMADA NAOKI, DHAR ABHINAV, HAYASHI KOSUKE, TOMIYAMA AKIO

    Sep. 2014, Proc. 2nd International Symposium on Multiscale Multiphase Process Engineering, pp. 106 - 115, English

    [Refereed]

    International conference proceedings

  • Numerical Simulaton of Slugging of Stagnant Liquid at a V-Shaped Elbow in a Pipeline

    IRIKURA MOTOKI, MAEKAWA MUNENORI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Elsevier, Aug. 2014, Applied Mathematical Modelling, 38 (17-18), 4238 - 4248, English

    [Refereed]

    Scientific journal

  • Mass Transfer from Single Carbon Dioxide Bubbles in Contaminated Water

    AOKI JIRO, HAYASHI KOSUKE, HOSODA SHOGO, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Aug. 2014, ASME 2014 4th joint US-European Fluids Engineering Division Summer Meeting and 11th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2014, FEDSM2014 - 21103, 8 pages, English

    [Refereed]

    International conference proceedings

  • Bubble Growth in Microgravity under the Action of Electric Forces: Experiments and Numerical Simulation

    DI MARCO PAOLO, KURIMOTO RYO, SACCONE GIACOMO, HAYASHI KOSUKE, TOMIYAMA AKIO

    Aug. 2014, Proc. 15th International Heat Transfer Conference, IHTC-15, IHTC15 - 08960, 11 pages, English

    [Refereed]

    International conference proceedings

  • 下降-上昇傾斜管のV字部におけるスラグ発生の数値シミュレーション

    IRIKURA MOTOKI, MAEKAWA MUNENORI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    化学工学会, Jul. 2014, 化学工学論文集, 40 (4), 275 - 281, Japanese

    [Refereed]

    Scientific journal

  • Numerical Simulations of Clean and Contaminated Bubbles in Linear Shear Flows

    HAYASHI KOSUKE, AOYAMA SHOHEI, TOMIYAMA AKIO

    Jul. 2014, International Conference on Numerical Methods for Multiphase Flow 2014, ICNMMF2014, 2 pages, English

    [Refereed]

    International conference proceedings

  • Evaluation of Interfacial Shear Stress of Single Drop using Spatiotemporal Filter Velocimetry

    HOSOKAWA SHIGEO, KITAHATA KYOSUKE, HAYASHI Kosuke, TOMIYAMA AKIO

    Jul. 2014, 17th International Symposium on Applications of Laser Techniques to Fluid Mechamics (LISBON 2014), English

    [Refereed]

    International conference proceedings

  • K. Hayashi, A. Tomiyama

    Effects of numerical treatment of viscous and surface tension forces on predicted motion of an interface are investigated. The viscous force and tangential surface tension force (Marangoni force) are treated in two different ways: one is a smeared-out interface method and the other is a ghost fluid method. In the smeared-out interface method, the arithmetic mean and harmonic mean are tested for evaluation of the viscous stress. Linear shear flows, single oscillating drops and surface tension waves are simulated using these methods. These benchmark tests show that the ghost fluid method gives the most accurate evaluations of the viscous and the Marangoni forces. The harmonic mean can give good evaluations of the tangential viscous stress at clean interface, whereas large errors in the viscous stress are caused for contaminated interface. Although the arithmetic mean causes some errors for clean and contaminated interfaces compared to the ghost fluid method, the error can be reduced by increasing spatial resolution and this method can give more reasonable predictions for contaminated interface than the harmonic mean. The arithmetic mean is therefore recommended rather than the harmonic mean when using the smeared-out interface method.

    Multi-Science Publishing Co. Ltd, 01 Jun. 2014, Journal of Computational Multiphase Flows, 6 (2), 111 - 126, English

    [Refereed]

    Scientific journal

  • Time Evolution of Diameter of Micro-Bubbles Generated by a Pressurized Dissolution Method

    ISHII Kazuya, HOSOKAWA SHIGEO, TOMIYAMA Akio, ITO Yoshihiro, MAEDA Yasunari

    Apr. 2014, AIP Proceedings, 1592, 333 - 340, English

    [Refereed]

    International conference proceedings

  • Measurement of Bubbly Flow Using Spatiotemporal Filter Velocimetry Coupled with Molecular Tagging

    HOSOKAWA SHIGEO, IKEDA Satoru, TOMIYAMA Akio

    Apr. 2014, AIP Proceedings, 1592, 224 - 231, English

    [Refereed]

    International conference proceedings

  • Numerical Simulations of Void Fractions in Air-Water Tests with a 4 x 4 Rod Bundle under Stagnant Water Conditions

    MURASE MICHIO, YANAGI CHIHIRO, UTANOHARA YOICHI, TAKATA TAKASHI, YAMAGUCHI AKIRA, TOMIYAMA AKIO

    Mar. 2014, Japanese Journal of Multiphase Flow, 28 (1), 55 - 61, Japanese

    [Refereed]

    Scientific journal

  • Air-Water Tests on Counter-current Flow Limitation at Lower End of Vertical Pipes Simulating Lower Part of Steam Generator U-tube

    KUSUNOKI TAKAYOSHI, DOI TAIGA, FUJII YUKI, TSUJI TAKASHI, MURASE MICHIO, TOMIYAMA AKIO

    日本混相流学会, Mar. 2014, Japanese Journal of Multiphase Flow, 28 (1), 62 - 70, Japanese

    [Refereed]

    Scientific journal

  • Void distribution and bubble motion in bubbly flows in a 4×4 rod bundle. Part II: numerical simulation

    HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Feb. 2014, Journal of Nuclear Science and Technology, 51 (5), 580 - 589, English

    [Refereed]

    Scientific journal

  • Shigeo Hosokawa, Kosuke Hayashi, Akio Tomiyama

    Lack of local void fraction data in a rod bundle makes it difficult to validate a numerical method for predicting gas-liquid two-phase flow in the bundle. Distributions of local void fraction and bubble velocity in each subchannel in a 4x4 rod bundle were, therefore, measured using a double-sensor conductivity probe. Liquid velocity in the subchannel was also measured using laser Doppler velocimetry (LDV) to obtain relative velocity between bubbles and the liquid phase. The size and pitch of rods were 10 and 12.5mm, respectively. Air and water at atmospheric pressure and room temperature were used for the gas and liquid phases, respectively. The volume fluxes of gas and liquid phases ranged from 0.06 to 0.15m/s and from 0.9 to 1.5m/s, respectively. Experimental results showed that the distributions of void fraction in inner and side subchannels depend not only on lift force acting on bubbles but also on geometrical constraints on bubble dynamics, i.e. the effects of rod walls on bubble shape and rise velocity. The relative velocity between bubbles and the liquid phase in the subchannel forms a non-uniform distribution over the cross-section, and the relative velocity becomes smaller as bubbles approach the wall due to the wall effects.

    TAYLOR & FRANCIS LTD, Feb. 2014, JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 51 (2), 220 - 230, English

    [Refereed]

    Scientific journal

  • Shogo Hosoda, Satoru Abe, Shigeo Hosokawa, Akio Tomiyama

    Mass transfer from single carbon dioxide bubbles in vertical pipes is measured using a stereoscopic image processing method to develop a mass transfer correlation applicable to a wide range of bubble diameters in standard pipe sizes. The diameters of pipes used are 12.5, 18.2, and 25.0 mm and the bubble diameter ranges from 5 to 26 mm. The ratio, lambda, of the bubble diameter to the pipe diameter is varied from 0.2 to 1.8, which covers various bubble shapes such as spheroidal, wobbling, cap, and Taylor bubbles. Measured Sherwood numbers, Sh, strongly depend on bubble shape, i.e., Sh of Taylor bubbles differs from that of spheroidal and wobbling bubbles. The Sherwood numbers are correlated in terms of the Peclet number Pe and lambda. The applicability of the proposed correlation to long-term bubble dissolution process is examined through comparisons between measured and predicted dissolution processes. The predictions are carried out by solving mass conservation equations not only for carbon dioxide but also for nitrogen and oxygen. Good agreements are obtained in the dissolution processes for various bubble sizes and the three pipe diameters. (C) 2013 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Feb. 2014, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 69, 215 - 222, English

    [Refereed]

    Scientific journal

  • Implicit-correction-based immersed boundary–lattice Boltzmann method with two relaxation times

    SETA Takeshi, ROJAS, Roberto, HAYASHI KOSUKE, TOMIYAMA AKIO

    Feb. 2014, Physical Review E, 89, 023307, English

    [Refereed]

    Scientific journal

  • Kosuke Hayashi, Shogo Hosoda, Gretar Tryggvason, Akio Tomiyama

    Interface tracking simulations of mass transfer from Taylor bubbles were carried out to investigate effects of shape oscillation on the mass transfer. Mass transfer from carbon dioxide Taylor bubbles in a glycerol-water solution was also measured to obtain experimental data for the validation of the numerical method. A high spatial resolution was used to resolve thin concentration boundary layers on the bubble interface, which enabled us to capture the agitation of boundary layer due to interfacial waves. The predicted mass transfer coefficients were in good agreements with the experimental data, provided that the spatial resolution was high enough to capture thin concentration boundary layers of high Schmidt number Taylor bubbles. The simulations have made it clear that the effect of agitation of concentration boundary layer due to interfacial waves on the total mass transfer rate is small and a fluctuation of the Sherwood number is caused by a fluctuation of the bubble surface area. This result implies that interface tracking methods using boundary layer approximations can give accurate predictions for mass transfer from bubbles even when the flow field is not fully resolved when the wave effect on the net mass transfer is negligible. (C) 2013 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2014, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 58, 236 - 245, English

    [Refereed]

    Scientific journal

  • Shimpei Ojima, Kosuke Hayashi, Akio Tomiyama

    To investigate the effects of hydrophilic particles on slurry bubble flows in a bubble column, distributions of the local gas holdup and the bubble frequency are measured using an electric conductivity probe. Particles are made of silica and their diameter is 100 mu m. The particle volumetric concentration C-S is varied from 0 to 0.40. The measured data imply that the presence of particles promotes bubble coalescence. The film drainage time for two coalescing bubbles in a quasi two-dimensional bubble flow in a small vessel is also measured to quantitatively evaluate the particle effect on coalescence. A particle-effect multiplier is introduced into a coalescence efficiency model by taking into account the data of film drainage time and is implemented into a multi-fluid model. The main conclusions obtained are as follows: (1) the local gas holdup and bubble frequency in slurry bubble flows decrease with increasing the particle concentration, (2) the hydrophilic particles enhance bubble coalescence and the enhancement saturates at C-S similar or equal to 0.45, (3) the particle effect on coalescence is well accounted for by introducing the particle-effect multiplier to the film drainage time, and (4) the multi-fluid model can give good predictions for the distribution of the local gas holdup in the slurry bubble column. (C) 2013 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2014, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 58, 154 - 167, English

    [Refereed]

    Scientific journal

  • Abhinav Dhar, Naoki Shimada, Kosuke Hayashi, Akio Tomiyama

    An interface-capturing method for simulating two-phase flows in complex geometries is proposed. A structured orthogonal grid is used, and the presence of stationary solid boundaries is taken into account by using the volume fraction of the solid phase in a computational cell. The transport equation of the fluid volume fraction in the presence of solid boundaries is derived. The fluid phases are transported by using the THAINC (tangent of hyperbola with adaptive slope for interface capturing) method. An immersed boundary method is implemented to accurately calculate the volume flux of each fluid phase through a computational cell face, a part of which is blocked by the solid phase. Transportation of a fluid square in the presence of solid boundaries is carried out, to con firm that the errors in shape and volume conservation are low. The applicability of the proposed method to two-phase flows in complex geometries is examined through simulations of a flow about cylindrical tubes in a staggered arrangement and a dam break problem with an obstacle. In the former the pressure drop in the single-phase condition agrees well with the available correlation and the gas-liquid behavior in the tube geometry is qualitatively well predicted. The predicted liquid flow in the dam break problem also agrees well with available experimental data.

    SOC CHEMICAL ENG JAPAN, 2014, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 47 (3), 230 - 240, English

    [Refereed]

    Scientific journal

  • Time Evolution of Diameter of Micro-Bubbles Generated by a Pressurized Dissolution Method

    ISHII Kazuya, HOSOKAWA SHIGEO, TOMIYAMA Akio, ITO Yoshihiro, MAEDA Yasunari

    Dec. 2013, Internatinal Symposium on Measurement Techniques for Multiphase Flows, ISMTMF2013, English

    [Refereed]

    International conference proceedings

  • Photobleaching Molecular Tagging Velocimetry and Its Application to Bubbly Flows

    HOSOKAWA SHIGEO, TOMIYAMA Akio

    Dec. 2013, Internatinal Symposium on Measurement Techniques for Multiphase Flows, ISMTMF2013, English

    [Refereed][Invited]

    International conference proceedings

  • Measurement of Bubbly Flow Using Spatiotemporal Filter Velocimetry Coupled with Molecular Tagging

    HOSOKAWA SHIGEO, IKEDA Satoru, TOMIYAMA Akio

    Dec. 2013, Internatinal Symposium on Measurement Techniques for Multiphase Flows, ISMTMF2013, English

    [Refereed]

    International conference proceedings

  • Mohd Hatta bin Mohd Akbar, Kosuke Hayashi, Dirk Lucas, Akio Tomiyama

    Experiments on bubbly flows in a rectangular column are carried out to investigate effects of inlet condition on How structure. An air diffuser having 35 nozzles is used. The inlet gas How rates from 34 nozzles are uniform and the lift coefficients of bubbles are small at this flow rate, whereas the gas inflow from the remaining one nozzle is varied to change the sign and magnitude of lift coefficients. The main conclusions obtained are as follows: (1) bubbly flow in a bubble column is apt to be heterogeneous even with small non-uniformity in the distribution of gas inflow; (2) when the nozzle causing non-uniform gas inflow is located in the center of the diffuser plate and the inflow distribution is symmetric, heterogeneous structure is formed mainly due to the lift-induced flow instability pointed out by Lucas et al. (2005); (3) when the nozzle causing non-uniform gas inflow is located near the side wall of the column and the inflow distribution is asymmetric, heterogeneous structure is induced by the Coanda effect; and (4) a multi-fluid model has a potential of predicting the effects of inlet condition on flow structure in a bubble column. (C) 2013 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Dec. 2013, CHEMICAL ENGINEERING SCIENCE, 104, 166 - 176, English

    [Refereed]

    Scientific journal

  • Shigeo Hosokawa, Ikumi Mikihara, Akio Tomiyama

    Optical measurement is an effective and accurate method to understand flow structures of multiphase flows. However, we frequently encounter difficulty in optical access due to the presence of interface and the complex geometry of a flow field. In the present study, we have developed small LDV optics to avoid the difficulty in optical access by installing the LDV probe into a channel component or by submerging the LDV probe into a flow field. The developed LDV optics consists of a manipulator and the probe. The manipulator splits a beam emitted from an Ar-ion laser into four beams. Each beam is introduced into an optical fiber through beam adjustment optics, and is transmitted to the probe through the fiber. The diameter of the probe is 7 mm. The laser beams emitted from the fibers in the probe are focused by a front lens of the probe and form a measurement volume. Scattered light from tracer particles are received by the probe and collected into a receiving fiber installed in the probe. The developed system is applied to laminar and turbulent flows in a rectangular duct for validation. Comparisons with a conventional LDV system show that the accuracy and reliability of the developed system are the same level as the conventional system. The application of the developed system to single-phase and bubbly flows in a 4 x 4 rod bundle demonstrates that the system has a large potential of measuring single-phase and multiphase flows in a channel with a complex geometry. (c) 2013 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE SA, Oct. 2013, NUCLEAR ENGINEERING AND DESIGN, 263, 342 - 349, English

    [Refereed]

    Scientific journal

  • B. Aboulhasanzadeh, S. Hosoda, A. Tomiyama, G. Tryggvason

    A multiscale approach for simulations of high Schmidt number mass transfer from bubbles into liquids is validated by detailed comparisons with experimental results. The approach is based on an embedded analytical description of the mass boundary layer next to the bubbles surface, coupled with a finite volume method for the rest of the domain. Two classes of bubbles are examined: Taylor bubbles in a pipe and freely rising bubbles. For the first class an axisymmetric domain is used, while for the latter a fully three-dimensional domain is used to capture the unsteady manner of a rising bubble. We also perform calculations of non-deformable freely rising bubbles for which we compare the computational results with analytical and semi-empirical correlations as well as experimental results from other authors. Mass transfer computations using the embedded analytical description approach show good agreement with the experimental results and the correlations. Based on the ratio of the thickness of the mass boundary layer to the grid size used to resolve the fluid flow we estimate that the use of the presented approach reduces the computational cost at least by one or two orders of magnitude, specially when applied in simulations of fully three-dimensional flows. © 2013 Elsevier Ltd.

    Elsevier Ltd, 20 Sep. 2013, Chemical Engineering Science, 101, 165 - 174, English

    [Refereed]

    Scientific journal

  • Tomographic Spatial Filter Velocimetry for Three-Dimensional Measurement of Fluid Velocity

    HOSOKAWA SHIGEO, TOMIYAMA AKIO, MATSUMOTO TAKAKI

    Springer, Sep. 2013, Experiments in Fluids, 54 (9), 1597, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Void Fraction in a Rod Bundle under Stagnant Liquid Condition

    MURASE MICHIO, YANAGI CHIHIRO, TAKATA TAKASHI, YAMAGUCHI AKIRA, TOMIYAMA AKIO

    Sep. 2013, ANS Winter Meeting, Washington D.C., English

    [Refereed]

    International conference proceedings

  • Immersed Boundary-Finite Difference Lattice Boltzmann Method Using Two Relaxation Times

    ROJAS, Roberto, SETA, Takeshi, HAYASHI KOSUKE, TOMIYAMA AKIO

    JSME, Sep. 2013, Journal of Fluid Science and Technology, 8 (3), 262 - 276, English

    [Refereed]

    Scientific journal

  • Gas-Liquid Two-Phase Flows Inside and Outside an Air Diffuser Pipe

    HAYASHI KOSUKE, TOMIYAMA AKIO

    Sep. 2013, 9th UK - Japan Seminar on Multi-Phase Flow, Japanese

    [Refereed]

    International conference proceedings

  • Distribution of Void Fraction and Liquid Velocity in Air-Water Bubble Column

    OJIMA Shinpei, HOSOKAWA SHIGEO, HAYASHI Kosuke, TOMIYAMA Akio

    Sep. 2013, 9th UK-Japan Seminar on Multi-Phase Flow, English

    [Refereed]

    International conference proceedings

  • CCFL at Lower End of a Vertical Pipe

    FUJII Yuki, DOI Taiga, MURASE Michio, HOSOKAWA SHIGEO, TOMIYAMA Akio

    American Nuclear Society, Sep. 2013, ANS Winter Meeting, English

    [Refereed]

    International conference proceedings

  • Paolo Di Marco, Ryo Kurimoto, Giacomo Saccone, Kosuke Hayashi, Akio Tomiyama

    In the present paper, a study of bubble dynamics in adiabatic conditions (i.e. with no heat and mass transfer) is carried out in order to understand the fundamental physics ruling the evolution of their interface, and open the way to the comprehension of more complex heat and mass transfer issues involving them. An external electric field is applied to the system to investigate the potentiality of this technique to enhance phase separation and heat transfer. A new numerical method for EHD action on a growing bubble has been developed combining VOF and level-set methods. To experimentally validate it, well-defined and simple boundary conditions have been selected: all the forms of heat and mass transfer have been excluded from the system, and an axisymmetric electric field configuration has been chosen in order to adopt a 2-D simulation. In the experimental apparatus a steady bubble stemming from an orifice in a still fluid (FC-72) has been produced, and a dc potential up to 20. kV was applied to a ring-shaped electrode coaxial with the orifice. In this way, in a first instance, all the dynamical effects have been eliminated, and a clear location of the three phase contact line, which is pinned to the orifice, has been defined. The bubble profile obtained from the experiment has been digitized and compared successfully with the outcomes of the numerical method. Furthermore, the study of the local curvature of the interface allowed the development of a new theory of the local electrical stress to be included in the capillary equation, which compares well with experimental data. Finally, the validated numerical method has been used to predict the bubble shape in the absence of gravity, in preparation of microgravity experiments. © 2013 Elsevier Inc.

    Sep. 2013, Experimental Thermal and Fluid Science, 49, 160 - 168, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Countercurrent Flow in a PWR Hot Leg by Using Two-Fluid Model

    MURASE Michio, UTANOHARA Yoichi, YANAGI Chihiro, TAKATA Takashi, YAMAGUCHI Akira, TOMIYAMA Akio

    Jul. 2013, Journal of Energy and Power Engineering, 7, 1215 - 1222, English

    [Refereed]

    Scientific journal

  • Measurement of Bubble Velocity using Spatial Filter Velocimetry

    HOSOKAWA SHIGEO, MATSUMOTO Takaaki, TOMIYAMA Akio

    Springer, Jun. 2013, Experiments in Fluids, 54 (6), 1538, English

    [Refereed]

    Scientific journal

  • Effects of Inlet Condition on Flow Structure of Bubbly Flow in Rectangular Column

    Mohd Hatta, bin Mohd, Akbar, HAYASHI KOSUKE, TOMIYAMA AKIO, LUCAS, Dirk

    Jun. 2013, 8th World Conference on Experimental Heat Transfer, Fluid Mechanics, and Thermodynamics (ExHFT8), USB memory, 8 pages, English

    [Refereed]

    International conference proceedings

  • Void Distribution and Bubble Motion in Bubbly Flows in a 4 X 4 Rod Bundle

    HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    May 2013, 15th International Topical Meeting on Nuclear Reactor Thermal - Hydraulics, NURETH-15, NURETH15 - 244, USB memory, 12 pages, English

    [Refereed]

    International conference proceedings

  • Numerical Simulations of Countercurrent Gas-Liquid Flows in a Vertical Pipe

    MURASE MICHIO, UTANOHARA YOICHI, YANAGI CHIHIRO, TAKATA TAKASHI, YAMAGUCHI AKIRA, TOMIYAMA AKIO

    May 2013, 8th International Conference on Multiphase Flow, ICMF2013, ICMF2013 - 047 (7 pages), English

    [Refereed]

    International conference proceedings

  • NUMERICAL SIMULATION OF BUBBLY FLOWS IN A 4 X 4 ROD BUNDLE USING A MULTI-FLUID MODEL

    HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2013, 15th International Topical Meeting on Nuclear Reactor Thermal - Hydraulics, NURETH-15, NURETH15 - 245, USB memory, 12 pages, English

    [Refereed]

    International conference proceedings

  • Mass Transfer from Single Carbon Dioxide Bubbles in Glycerol-Water Solution

    AOKI JIRO, HOSODA SHOGO, HAYASHI KOSUKE, TOMIYAMA AKIO, HOSOKAWA SHIGEO

    May 2013, 8th International Conference on Multiphase Flow, ICMF2013, ICMF2013 - 229, USB memory, 9 pages, English

    [Refereed]

    International conference proceedings

  • Effects of Shape Oscillation on Mass Transfer from a Taylor Bubble

    HOSODA SHOGO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2013, 8th International Conference on Multiphase Flow, ICMF2013, ICMF2013 - 286, USB memory, 8 pages, English

    [Refereed]

    International conference proceedings

  • Effects of Hydrophilic Particles on Bubble Coalescence in Slurry Bubble Column

    OJIMA SHIMPEI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    May 2013, 8th International Conference on Multiphase Flow, ICMF2013, ICMF2013 - 157, USB memory, 13 pages, English

    [Refereed]

    International conference proceedings

  • Shigeo Hosokawa, Akio Tomiyama

    Turbulence intensities and Reynolds stresses of bubble-induced pseudo turbulence in air-water laminar bubbly flows in a vertical pipe of 20 mm diameter are measured at a low liquid Reynolds number, Re = 900. A pipe made of fluorinated ethylene propylene resin, which has the same refractive index as water, is utilized to enable the LDV measurement of Reynolds stresses. Experimental data show that (1) turbulence kinetic energy of bubble-induced turbulence is proportional to local void fraction, (2) the ratio among axial, radial and azimuthal components of turbulence intensity is 2:1:1, (3) Sato's eddy viscosity model underestimates the Reynolds shear stress of bubble-induced pseudo turbulence, whereas it qualitatively well represents the Reynolds stress distribution, (4) the Reynolds shear stress of bubble-induced turbulence depend not only on velocity gradient but also on gradient of void fraction and (5) the dissipation process of bubble-induced turbulence is analogous to that of shear-induced turbulence. (C) 2013 Elsevier Inc. All rights reserved.

    ELSEVIER SCIENCE INC, Apr. 2013, INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 40, 97 - 105, English

    [Refereed]

    Scientific journal

  • 気液界面の簡易的数値計算法

    DHAR Abhinav, SHIMADA Naoki, TOMIYAMA Akio

    Mar. 2013, 化学工学論文集, 39 (2), 86 - 93, Japanese

    [Refereed]

    Scientific journal

  • Terminal velocities of clean and fully-contaminated drops in vertical pipes

    KURIMOTO, Ryo, HAYASHI, Kosuke, TOMIYAMA, Akio

    Mar. 2013, International Journal of Multiphase Flow, Vol. 49, pp. 8-23

    [Refereed]

    Scientific journal

  • Roberto Rojas, Kosuke Hayashi, Takeshi Seta, Akio Tomiyama

    The applicability of the immersed boundary-finite difference lattice Boltzmann method (IB-FDLBM) to high Reynolds number flows about a circular cylinder is examined. Two-dimensional simulations of flows past a stationary circular cylinder are carried out for a wide range of the Reynolds number, Re, i.e., 1 Re 1 105. An immersed boundary-lattice Boltzmann method (IB-LBM) is also used for comparison. Then free-falling circular cylinders are simulated to demonstrate the feasibility of predicting moving particles at high Reynolds numbers. The main conclusions obtained are as follows: (1) steady and unsteady flows about a stationary cylinder are well predicted with IB-LBM and IB-FDLBM, provided that the spatial resolution is high enough to satisfy the conditions of numerical stability, (2) high spatial resolution is required for stable IB-LBM simulation of high Reynolds number flows, (3) IB-FDLBM can stably simulate flows at very high Reynolds numbers without increasing the spatial resolution, (4) IB-FDLBM gives reasonable predictions of the drag coefficient for 1 Re1105, and (5) IB-FDLBM gives accurate predictions for the motion of free-falling cylinders at intermediate Reynolds numbers.

    Multi-Science Publishing, 01 Mar. 2013, Journal of Computational Multiphase Flows, 5 (1), 27 - 41, English

    [Refereed]

    Scientific journal

  • NUMERICAL ANALYSIS OF THERMAL-HYDRAULICS BY IMMERSED BOUNDARY-LATTICE BOLTZMANN METHOD USING TWO-RELAXATION-TIME

    SETA, Takeshi, UCHIDA, Yosuke, ROJAS, Roberto, HAYASHI, Kosuke, TOMIYAMA, Akio

    Dec. 2012, 計算数理工学論文集, Vol. 12, pp. 37-42, Japanese

    [Refereed]

    Scientific journal

  • Onset of Slugging of Stagnant Liquid at a V-Shaped Elbow in a Pipeline: Experiment and Numerical Simulation

    IRIKURA Motoki, MAEKAWA Munenori, HOSOKAWA Shigeo, TOMIYAMA Akio

    Dec. 2012, Ninth International Conference on Computational Fluid Dynamics in the Minerals and Process Industries, English

    [Refereed]

    International conference proceedings

  • Numerical analysis of thermal-hydraulics by immersed boundary-lattice Boltzmann method using two-relaxation-time

    SETA, Takeshi, UCHIDA, Yosuke, ROJAS, Roberto, HAYASHI, Kosuke, TOMIYAMA, Akio

    Dec. 2012, ICOME2012/JASCOME2012

    International conference proceedings

  • IMMERSED BOUNDARY-FINITE DIFFERENCE LATTICE BOLTZMANN METHOD USING TWO RELAXATION TIMES

    ROJAS, Roberto, SETA, Takeshi, HAYASHI, Kosuke, TOMIYAMA, Akio

    Dec. 2012, 9th International Conference on CFD in the Minerals and Process Industries,, CD-ROM, 6 pages, English

    [Refereed]

    International conference proceedings

  • Experimental Investigation of Stratified Two-Phase Flows in the Hot Leg of a PWR for CFD Validation

    VALLEE Christophe, LUCAS Dirk, TOMIYAMA Akio, MURASE Michio

    Dec. 2012, International Journal of Electricity and Heat Generation, 12, 40 - 46, English

    [Refereed]

    Scientific journal

  • EFFECTS OF NUMERICAL TREATMENT OF VISCOUS AND SURFACE TENSION FORCES ON PREDICTED INTERFACE MOTION

    HAYASHI, Kosuke, TOMIYAMA, Akio

    Dec. 2012, 9th International Conference on CFD in the Minerals and Process Industries,, CD-ROM, 6 pages

    [Refereed]

    International conference proceedings

  • Counter-Current Flow Limitation at Lower Ends of Vertical Pipes

    DOI Taiga, FUJII Yuki, KAWASAKI Ikuo, MURASE Michio, HOSOKAWA Shigeo, TOMIYAMA Akio

    Dec. 2012, 8th Japan-Korea Symposium on Nuclear Thermal Hydraulics ans Safty (NTHAS-8), USB Memory, English

    [Refereed]

    International conference proceedings

  • BUBBLE TRACKING SIMULATION OF BUBBLE-INDUCED PSEUDOTURBULENCE

    Mohd Hatta, bin Mohd, Akbar, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Begell house, Dec. 2012, Multiphase Science and Technology, 24 (3), 197 - 222, DOI: 10.1615/MultScienTec, English

    [Refereed]

    Scientific journal

  • Interface Tracking Simulation of Bubbles in Clean and Contaminated Systems

    HAYASHI, Kosuke, TOMIYAMA, Akio

    Nov. 2012, Korea-Japan CFD Workshop 2012,, 8 pages

    International conference proceedings

  • Development of a Submergible Small Fiber LDV Probe and Its Application to Flows in a 4 x 4 Rod Bundle

    HOSOKAWA Shigeo, MIKIHARA Ikumi, TOMIYAMA Akio, ZHANG Zheng

    Oct. 2012, 7th International Symposium on Multiphase Flow, Heat and Mass Transfer and Energy Conversion, CD-ROM, English

    [Refereed]

    International conference proceedings

  • BUBBLE TRACKING SIMULATION OF BUBBLE-INDUCED PSEUDO TURBULENCE

    Mohd Hatta, bin Mohd, Akbar, Hayashi, Kosuke, Hosokawa, Shigeo, TOMIYAMA, Akio

    Sep. 2012, 6th Japanese-European Two-Phase Flow Group Meeting, USB memory, 10 pages

    [Refereed]

    International conference proceedings

  • Application of Spatial Filter velocimetry to Bubbly Flows

    HOSOKAWA Shigeo, MATSUMOTO Takaaki, TOMIYAMA Akio

    Sep. 2012, 6th Japanese-European Two-phase Flow Group Meeting, USB Memory, English

    [Refereed]

    International conference proceedings

  • Numerical Simulations for Steam-Water CCFL Tests using the 1/3 Scale Rectangular Channel Simulating a PWR Hot Leg

    UTANOHARA Yoichi, KINOSHITA Ikuo, KINOSHITA Ikuo, LUCAS Dirk, VALLEE Christophe, TOMIYAMA Akio

    Aug. 2012, Nuclear Engineering and Design, Vol.249, pp.14-23, English

    [Refereed]

    Scientific journal

  • Measurements of turbulent flows in a 2 × 2 rod bundle

    HOSOKAWA Shigeo, YAMAMOTO Taishi, OKAJIMA Jun, TOMIYAMA Akio

    Aug. 2012, Nuclear Engineering and Design, Vol. 249, pp. 2-13, English

    [Refereed]

    Scientific journal

  • Effects of swirler shape on swirling annular flow in a gas–liquid separator

    MATSUBAYASHI, Toshiki, KATONO, Kenichi, HAYASHI, Kosuke, TOMIYAMA, Akio

    Aug. 2012, Nuclear Engineering and Design, Vol. 249 pp. 63–70

    [Refereed]

    Scientific journal

  • Onset of Slugging of Stagnant Liquid at a V-Shaped Elbow in a Pipeline

    IRIKURA Motoki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2012, Transactions of the Japan Society of Mechanical Engineers, B編, Vol. 78, No. 791, pp. 1292, Japanese

    [Refereed]

    Scientific journal

  • Two-phase swirling flow in a barrel of a steam separator

    MIKA Takeshi, MATSUBAYASHI Toshiki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2012, International Journal of Nuclear Safety and Simulation, Vol. 3, No. 2, pp. 124 - 131, English

    [Refereed]

    Scientific journal

  • Tomographic Spatial Filter Velocimetry for Three-Dimensional Measurement of Fluid Velocity

    HOSOKAWA Shigeo, MATSUMOTO Takaaki, TOMIYAMA Akio

    Jul. 2012, The 16th Symposium on Applications of Laser Techniques to Fluid Mechanics (Lisbon 2012), online CD, English

    [Refereed]

    International conference proceedings

  • Measurements of Bubble Velocity using Spatial Filter Velocimetry

    MATSUMOTO Takaaki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2012, The 16th Symposium on Applications of Laser Techniques to Fluid Mechanics (Lisbon 2012), online CD, English

    [Refereed]

    International conference proceedings

  • Spatial Filter Velocimetry based on Time-Seriese Particle Images

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Jun. 2012, Experiments in Fluids, Vol. 52, No. 6, pp. 1361 - 137, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Mass Transfer From a Taylor Bubble with Shape Oscillation

    HOSODA, Shogo, HAYASHI Kosuke, HOSOKAWA, Shigeo, TOMIYAMA, Akio

    Jun. 2012, International Conference on Numerical Methods in Multiphase Flows, No. 7-1

    International conference proceedings

  • Immersed Boundary-Lattice Boltzmann Method Using Two Relaxation Times

    HAYASHI, Kosuke, ROJAS, Roberto, SETA, Takeshi, TOMIYAMA, Akio

    Jun. 2012, The Journal of Computational Multiphase Flows, Vol. 4, No. 2, pp. 193-209

    [Refereed]

    Scientific journal

  • Evaluation of Turbulence Kinetic Energy Budget in Turbulent Flows by using Photobleaching Molecular Tagging Velocimetry

    HOSOKAWA Shigeo, MIZUMOTO Hiroki, TOMIYAMA Akio

    Jun. 2012, Journal of Fluid Scienece and Technology, Vol. 7, No. 1, pp. 168 - 180, English

    [Refereed]

    Scientific journal

  • EFFECTS OF SURFACTANT ON THE MOTION OF BUBBLES IN LINEAR SHEAR FLOWS

    HAYASHI, Kosuke, KURIMOTO, Ryo, HOSOKAWA, Shigeo, TOMIYAMA, Akio

    Jun. 2012, 2012 Japan-U.S. seminar on Two-Phase flow Dynamics, USB memory, 10 pages

    International conference proceedings

  • Development of A Submergible Small Fiber LDV for Measuring Complex Multiphase Flows

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Jun. 2012, Japan-US Seminer on Two-Phase Flow Dynamics 2012, USB, English

    [Refereed]

    International conference proceedings

  • Study on Flows inside and outside an Air Diffuser for Membrane Bioreactor

    KIRA, Fumihiro, FURUNO, Shinsuke, HAYASHI Kosuke, SAMPEI, Tomoyuki, TOMIYAMA, Akio

    Apr. 2012, Journal of Fluid Science and Technology, Vol. 7, No. 1, pp. 78-88

    [Refereed]

    Scientific journal

  • Mixing of thermally stratified water layer by a free rising wobbling air bubble

    Zun Iztok, PERPAR Matjaz, GREGORC Jurij, HAYASHI Kosuke, TOMIYAMA Akio

    Apr. 2012, Chemical Engineering Science, Vol. 72, pp. 155–171

    [Refereed]

    Scientific journal

  • Countercurrent Flow Limitation at the Junction between the Surge Line and the Pressurizer of a PWR

    DOI, Taiga, FUTATSUGI, Takashi, MURASE, Michio, HAYASHI, Kosuke, HOSOKAWA, Shigeo, TOMIYAMA, Akio

    Apr. 2012, Science and Technology of Nuclear Installations, Vol. 2012, 754724, 10 pages

    [Refereed]

    Scientific journal

  • 加圧溶解型微細気泡発生装置における気泡径、気泡密度と濁度の関係

    TAYA Chihiro, MAEDA Yasunari, HOSOKAWA Shigeo, TOMIYAMA Akio, ITO Yoshihiro, SHIBATA Naoki

    Mar. 2012, 混相流, Vol. 25, No. 5, pp. 407 - 414, Japanese

    [Refereed]

    Scientific journal

  • Turbulence Kinetic Energy Budget in Bubbly Flows in a Vertical Duct

    HOSOKAWA Shigeo, SUZUKI Takashi, TOMIYAMA Akio

    Mar. 2012, Experiments in Fluids, Vol. 57, No. 3, pp. 719-728, D, English

    [Refereed]

    Scientific journal

  • Size Distributions of Micro-bubbles Generated by a Pressurized Dissolution Method

    TAYA Chihiro, MAEDA Yasunari, HOSOKAWA Shigeo, TOMIYAMA Akio, ITO Yoshihiro

    Mar. 2012, AIP Conference Proceedings, Volume 1428, 2012, pp. 199 - 2, English

    [Refereed]

    International conference proceedings

  • Interface Tracking Simulation of Mass Transfer from a Dissolving Bubble

    HAYASHI Kosuke, TOMIYAMA Akio

    Mar. 2012, Journal of Computational Multiphase Flows, 3(4), 247-261

    [Refereed]

    Scientific journal

  • Evaluation of Turbulence Kinetic Energy Budget in Turbulent Flows by using a Photobleaching Molecular Tagging Velocimetry

    HOSOKAWA Shigeo, MIZUMOTO Hiroki, SUZUKI Takashi, TOMIYAMA Akio

    Mar. 2012, AIP Conference Proceedings, Volume 1428, 2012, pp. 295 - 3, English

    [Refereed]

    International conference proceedings

  • Effects of surfactant on terminal velocity of a Taylor bubble in a vertical pipe

    HAYASHI Kosuke, TOMIYAMA Akio

    Mar. 2012, International Journal of Multiphase Flow, Vol. 39, pp. 78-87

    [Refereed]

    Scientific journal

  • Countercurrent Air-Water Flow in a Scale-Down Model of a Pressurizer Surge Line

    FUTATSUGI Takashi, YANAGI Chihiro, MURASE Michio, HOSOKAWA Shigeo, TOMIYAMA Akio

    Mar. 2012, Science and Technology of Nuclear Installations, Vol. 2012, Article ID 174838,, English

    [Refereed]

    Scientific journal

  • VOF Calculations of Countercurrent Gas-Liquid Flow in a PWR Hot Leg

    MURASE Michio, TOMIYAMA Akio, KINOSHITA Ikuo, UTANOHARA Yoichi, YANAGI Chihiro, TAKATA Takashi, YAMAGUCHI Akira

    2012, Science and Technology of Nuclear Installations, Vol.2012, doi:10.1155/2012/935, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Size Effects on Countercurrent Flow Limitation in PWR Hot Leg Models

    KINOSHITA Ikuo, MURASE Michio, TOMIYAMA Akio

    2012, Science and Technology of Nuclear Installations, Vol.2012, doi:10.1155/2012/907, English

    [Refereed]

    Scientific journal

  • Experimental Characterisation of the Interfacial Structure during Counter-Current Flow Limitation in a Model of the Hot Leg of a PWR

    VALLEE Christophe, NARIAI Toshifumi, FUTATSUGI Takashi, TOMIYAMA Akio, LUCAS Dirk, MURASE Michio

    2012, Science and Technology of Nuclear Installations, Vol.2012, doi:10.1155/2012/298, English

    [Refereed]

    Scientific journal

  • Correlation for Countercurrent Flow Limitation in a PWR Hot Leg

    MURASE Michio, TOMIYAMA Akio, LUCAS Dirk, KINOSHITA Ikuo, UTANOHARA Yoichi, YANAGI Chihiro

    2012, Journal of Nuclear Science and Technology, Vol.49, No.4, pp.398-408, English

    [Refereed]

    Scientific journal

  • Liquid Mixing in a Bubble Column

    Naoki Shimada, Rina Saiki, Abhinav Dhar, Kei Mizuta, Akio Tomiyama

    In most of the bubble column designs, it is assumed that the liquid phase is well mixed and spatial distributions of molar concentrations of all components are uniform. However, liquid mixing occurs in actual bubble columns. The performance of a bubble column strongly depends on the liquid mixing induced by bubbles in the column. The above-mensioned assumptions therefore lead to errors in the optimum column design. However, only a few quantitative investigations have been carried out on two-phase turbulence and liquid mixing. In this study, numerical simulations of liquid mixing in a bubble column were carried out and the results obtained were compared with those of experiments. Time-dependent tracer concentrations were measured for test columns 0.3 m in diameter. The height of the columns was 1 m. Bubbles were supplied by using two types of spargers, ring spargers and a perforated plate. A hybrid method, NP2-3D, that is based on a combination of multi-fluid and interface tracking models was used to simulate the flow. In a two-phase turbulence model, the linear superposition of bubble-induced turbulence and shear-induced turbulence was assumed. Numerical were found to be good predictions of the effects of the column diameter and gas inlet on the liquid mixing in the column.

    SOC CHEMICAL ENG JAPAN, 2012, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 45 (9), 632 - 638, English

    [Refereed]

    Scientific journal

  • Evaluation of Turbulence Kinetic Energy Budget in Turbulent Flows by using a Photobleaching Molecular Tagging Velocimetry

    MIZUMOTO Hiroki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Dec. 2011, Transactions of the Japan Society of Mechanical Engineers, B編,第77巻, 784号, pp. 2263-2272, Japanese

    [Refereed]

    Scientific journal

  • Immersed Boundary-Finite Difference Lattice Boltzmann Method for Liquid-Solid Two-Phase Flows

    ROJAS Roberto, SETA Takeshi, HAYASHI Kosuke, TOMIYAMA Akio

    Dec. 2011, Journal of Fluid Science and Technology, 6(6), 1051-1064

    [Refereed]

    Scientific journal

  • On the role of the lateral lift force in poly-dispersed bubbly flows

    LUCAS, Dirk, TOMIYAMA Akio

    Nov. 2011, International Journal of Multiphase Flow, Vol. 37, Iss.9, pp. 1178-1190

    [Refereed]

    Scientific journal

  • Multiscale Simulation of Dispersed Flow in Bubble Columns

    TOMIYAMA Akio, OJIMA Shinpei, HAYASHI Kosuke, HOSOKAWA Shigeo

    Oct. 2011, Proc. of 1st International Symposium on Multiscale Multiphase Process Engineering (MMPE), CD-ROM (6 pages)

    International conference proceedings

  • Size Distributions of Micro-bubbles Generated by a Pressurized Dissolution Method

    TAYA Chihiro, MAEDA Yasunari, HOSOKAWA Shigeo, TOMIYAMA Akio, ITO Yoshihiro

    Sep. 2011, Proc. the 7th International Symposium on Measurement Techniques for Multiphase Flows, USB Memory, English

    [Refereed]

    International conference proceedings

  • Mass transfer from a dissolving carbon dioxide bubble in glycerol-water solution

    HOSODA, Shogo, HAYASHI Kosuke, TOMIYAMA Akio

    Sep. 2011, International Conference on Advanced Technology in Experimental Mechanics 2011

    International conference proceedings

  • Experimental Characterisation of the Interfacial Structure During Counter-Current Flow Limitation in a Model of the Hot Leg of a PWR

    VALLEE Christophe, NARIAI Toshifumi, FUTATSUGI Takashi, TOMIYAMA Akio, LUCAS Dirk, MURASE Michio

    Sep. 2011, Proc. of 14th International Topical Meeting on Nuclear Reactor Thermalhydraulics (NURETH-14), No. NURETH14-175, CD-ROM (14 p

    [Refereed]

    International conference proceedings

  • Evaluation of Turbulence Kinetic Energy Budget in Turbulent Flows by using a Photobleaching Molecular Tagging Velocimetry

    MIZUMOTO Hiroki, HOSOKAWA Shigeo, SUZUKI Takashi, TOMIYAMA Akio

    Sep. 2011, Proc. the 7th International Symposium on Measurement Techniques for Multiphase Flows, USB Memory, English

    [Refereed]

    International conference proceedings

  • Counter-current flow limitation at the junction between the surge line and the pressurizer of a PWR

    FUTATSUGI, Takashi, NARIAI, Toshifumi, HAYASHI, Kosuke, TOMIYAMA Akio, YANAGI, Chihiro, MURASE, Michio

    Sep. 2011, Proc. of 14th International Topical Meeting on Nuclear Reactor Thermalhydraulics (NURETH-14), No. NURETH14-057, CD-ROM (12 p

    [Refereed]

    International conference proceedings

  • Assessment of turbulence models for bubbly flow in a bubble column

    SATO, Hiroyasu, Mohd Hatta Bin Mohd, Akbar, HAYASHI, Kosuke, TOMIYAMA Akio

    Sep. 2011, International Conference on Advanced Technology in Experimental Mechanics 2011

    International conference proceedings

  • Spatial Filter Velocimetry based on Time-series Particle Images

    HOSOKAWA Shigeo, SAKAMOTO Hiroki, TOMIYAMA Akio

    Jul. 2011, Proc. the ASME-JSME-KSME Joint Fluids Engineering Conference 2011, USB Memory, English

    [Refereed]

    International conference proceedings

  • Numerical Simulation of Bubbles Contaminated with Soluble Surfactant

    KURIMOTO Ryo, HAYASHI Kosuke, TOMIYAMA Akio

    Jul. 2011, Proc. of ASME-JSME-KSME joint Fluids Engineering Conference 2011, AJKFED2011-04019, 10 pages

    [Refereed]

    International conference proceedings

  • Interface tracking simulation of mass transfer from a dissolving bubble

    HAYASHI Kosuke, TOMIYAMA Akio

    Jul. 2011, Proc. of ASME-JSME-KSME joint Fluids Engineering Conference 2011, AJKFED2011-04007, 9 pages

    [Refereed]

    International conference proceedings

  • Influence of dissolved gas concentration on diameter and number density of micro-bubbles

    MAEDA Yasunari, TAYA Chihiro, HOSOKAWA Shigeo, TOMIYAMA Akio, ITO Yoshihiro, SHIBATA Naoki

    Jul. 2011, Proc. the ASME-JSME-KSME Joint Fluids Engineering Conference 2011, USB Memory, English

    [Refereed]

    International conference proceedings

  • Interface tracking and multi-fluid simulation of bubbly flows in bubble columns

    TOMIYAMA Akio, HAYASHI Kosuke

    Jun. 2011, 8th International Conference on COMPUTATIONAL FLUID DYNAMICS in the Oil & Gas, Metallurgical and Process Industries

    International conference proceedings

  • Hybrid Simulation of Gas-Liquid and Gas-Liquid-Solid Bubbly Flows in Bubble Columns

    TOMIYAMA Akio

    Jun. 2011, Proceedings of the Gas-Liquid and Gas-Liquid-Solid Reactor Engineering Congress (Plenary lecture)

    International conference proceedings

  • Interface tracking simulation of dissolving bubbles and of contaminated bubbles and drops

    TOMIYAMA Akio, HAYASHI Kosuke

    May 2011, 49th European Two-Phase Flow Group Meeting

    International conference proceedings

  • Comparison of Counter-Current Flow Limitation Experiments performed in Two Different Models of the Hot Leg of a Pressurized Water Reactor with Rectangular Cross-Section

    VALLEE Christophe, SEIDEL Tobias, LUCAS Dirk, TOMIYAMA Akio, MURASE Michio

    May 2011, ASME Journal of Engineering for Gas Turbine and Power, Vol.133, Issue 5, pp.052917 1-, English

    [Refereed]

    Scientific journal

  • K. Hayashi, R. Kurimoto, A. Tomiyama

    A scaling analysis based on the field equations for two phases and the jump conditions at the interface is carried out to deduce a balance of forces acting on a Taylor drop rising through stagnant liquid in a vertical pipe. The force balance is utilized to deduce a functional form of an empirical correlation of terminal velocity of the Taylor drop. Undetermined coefficients in the correlation are evaluated by making use of available correlations for two limiting cases, i.e. extremely high and low Reynolds number Taylor bubbles in large pipes. Terminal velocity data obtained by interface tracking simulations are also used to determine the coefficients. The proposed correlation expresses the Froude number Fr as a function of the drop Reynolds number Re-D, the Eotvos number Eo(D) and the viscosity ratio mu*. Comparisons between the correlation, simulations and experimental data confirm that the proposed correlation is applicable to Taylor drops under various conditions, i.e., 0.002 < Re-D < 4960, 4.8 < Eo(D) < 228, 0 <= mu* <= 70, 1 < N < 14700, -12 < log M < 4, and d/D < 1.6, where N is the inverse viscosity number, M the Morton number, d the sphere-volume equivalent drop diameter and D the pipe diameter. (C) 2010 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Apr. 2011, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 37 (3), 241 - 251, English

    [Refereed]

    Scientific journal

  • Countercurrent Gas-Liquid Flow in a Rectangular Channel Simulating a PWR Hot Leg (3) (Evaluation of Effects of Fluid Properties using VOF Method)

    KINOSHITA Ikuo, MURASE Michio, NARIAI Toshifumi, TOMIYAMA Akio

    Mar. 2011, 混相流, Vol. 24, No. 4, pp. 445-452, Japanese

    [Refereed]

    Scientific journal

  • Mass Transfer from a Bubble in a Vertical Pipe

    HOSODA, Shogo, SAKATA, Ryosuke, HAYASHI, Kosuke, TOMIYAMA, Akio

    Mar. 2011, ASME/JSME 8th Thermal Engineering joint Conference, AJTEC2011-44089, 9 pages

    [Refereed]

    International conference proceedings

  • Numerical Simulation using CFD Software of Countercurrent Gas-Liquid Flow in a PWR Hot Leg under Reflux Condensation

    UTANOHARA Yoichi, KINOSHITA Ikuo, MURASE Michio, Minami Noritoshi, NARIAI Toshifumi, TOMIYAMA Akio

    2011, Nuclear Engineering and Design, Vol.241, pp.1643-1655, English

    [Refereed]

    Scientific journal

  • Effects of Liquid Properties on CCFL in a Scaled-Down Model of a PWR Hot Leg

    KINOSHITA Ikuo, NARIAI Toshifumi, TOMIYAMA Akio, LUCAS Dirk, MURASE Michio

    2011, Journal of Power and Energy Systems, Vol.5, No.3, pp.316-329, English

    [Refereed]

    Scientific journal

  • Countercurrent Gas-Liquid Flow in a PWR Hot Leg with Air-Water Flow in a 1/15 Scale Model

    MINAMI Noritoshi, MURASE Michio, UTANOHARA Yoichi, KINOSHITA Ikuo, TOMIYAMA Akio

    2011, Journal of Energy and Power Engineering, Vol.5, pp.495-503, English

    [Refereed]

    Scientific journal

  • MAEDA Yasunari, HOSOKAWA Shigeo, TAYA Chihiro, TOMIYAMA Akio, YAMAGUCHI Shigeyuki, ITO Yoshihiro

    Dec. 2010, 混相流, Vol. 24, No. 4, pp. 462-469, Japanese

    [Refereed]

    Scientific journal

  • Numerical Verification of a Simplified Model for Vapor Bubble Lift-Off from a Hydrophlic Heated Flat-Wall

    OKAWA Tomio, HAYASHI Kosuke, TOMIYAMA Akio

    Dec. 2010, Nuclear Engineering and Design, Vol. 240, pp. 3942-3948

    [Refereed]

    Scientific journal

  • Countercurrent Gas Liquid Flow in a PWR Hot Leg during Reflux Condensation

    MURASE Michio, MINAMI Noritoshi, NAGAE Takashi, TOMIYAMA Akio

    Dec. 2010, International Journal of Nuclear Safety and Simulation, Vol. 1, No. 4, pp. 291-306

    [Refereed]

    Scientific journal

  • Velocity Distributions of Turbulent Flows in a 2x2 rod bundle

    HOSOKAWA Shigeo, OKAJIMA Jun, YAMAMOTO Taishi, TOMIYAMA Akio

    Nov. 2010, Proc. 2010 ANS Winter Meeting, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Measurements of turbulent flows in a 2x2 Rod bundle

    OKAJIMA Jun, HOSOKAWA Shigeo, YAMAMOTO Taishi, TOMIYAMA Akio

    Oct. 2010, The 8th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-8), CD-ROM, English

    [Refereed]

    International conference proceedings

  • Effect of Swirler Shape on Swirling Annular Flow in a Gas-Liquid Separator

    KATAOKA Hironobu, SHINKAI Yusuke, MATSUBAYASHI Yusuke, TOMIYAMA Akio

    Oct. 2010, 8th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-8), N8P0108, CD-ROM

    [Refereed]

    International conference proceedings

  • Counter-Current Flow Limitation in a Scale-Down Model of a PWR Hot Leg

    NARIAI Toshifumi, TOMIYAMA Akio, VALLEE Christophe, LUCAS Dirk, MURASE Michio

    Oct. 2010, 8th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-8), N8P0109, CD-ROM

    [Refereed]

    International conference proceedings

  • Cavitation in Nozzles of Plain Orifice Atomizers with Various Length-to-Diameter Ratios

    SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    Oct. 2010, Atomization and Sprays, Vol. 20, Iss. 6, pp. 513-524, English

    [Refereed]

    Scientific journal

  • Interface Tracking simulation of mass transfer from a dissolving bubble in a vertical pipe

    HAYASHI Kosuke, TOMIYAMA Akio

    Sep. 2010, 8th Japan-UK Seminar on Multiphase Flows

    International conference proceedings

  • Void Fraction in a Four by Four Rod Bundle Under a Stagnant Condition

    KAMEI Akihiro, HOSOKAWA Shigeo, TOMIYAMA Akio, KINOSHITA Ikuo, MURASE Michio

    Aug. 2010, Journal of Power and Energy Science, Vol. 4, No. 2, pp. 315-326, English

    [Refereed]

    Scientific journal

  • Turbulence Kinetic Energy Budget in Bubbly Flows in a Vertical Duct

    HOSOKAWA Shigeo, SUZUKI Takashi, TOMIYAMA Akio

    Jul. 2010, Proc. 15th International Symposium on Application of Laser Techniqes to Fluid Mechanics, Lisbon, USB Memory, English

    [Refereed]

    International conference proceedings

  • Effects of Bubbles on Turbulence Properties in a Duct Flow

    HOSOKAWA Shigeo, SUZUKI Takashi, TOMIYAMA Akio

    Jul. 2010, Multiphase Science and Technology, Vol. 22, Issue 3, pp. 211-232, English

    [Refereed]

    Scientific journal

  • Dimensional Analysis of Terminal Velocities of a Taylor Bubble in Vertical Pipe

    HAYASHI Kosuke, KURIMOTO Ryo, TOMIYAMA Akio

    Jul. 2010, Multiphase Science and Technology, Vol. 22, Issue 3, pp. 197-210

    [Refereed]

    Scientific journal

  • Effects of Bubbles on Turbulent Flows in Vertical Channels

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Jun. 2010, Proc. International Conference on Multiphase Flow 2010 (ICMF 2010): Keynote Lecture, USB Memory, English

    International conference proceedings

  • Agitation of thermally stratified water layer by free rising wobbling air bubble

    ZUN Iztok, PERPAR Matjaz, GREGORC Jurij, HAYASHI Kosuke, TOMIYAMA Akio

    Jun. 2010, 48th European Two-Phase Flow Group Meeting 2010, ETPFGM'10

    International conference proceedings

  • Effect of entrained air bubbles on micro bubbles generated by a pressurized dissolution method

    HOSOKAWA Shigeo, TANAKA Kenzo, Maeda Yasunari, TOMIYAMA Akio, YAMAGUCHI Shigeyuki, ITO Yoshihiro

    May 2010, Transactions of the Japan Society of Mechanical Engineers, B編,第76巻, 765号, pp. 763-770, Japanese

    [Refereed]

    Scientific journal

  • Terminal velocity of a Taylor drop in a vertical pipe

    HAYASHI Kosuke, Ryo Kurimoto, TOMIYAMA Akio

    May 2010, Proc. of 7th International Conference on Multiphase Flow, ICMF2010, 13 pages

    [Refereed]

    International conference proceedings

  • Terminal velocity of a single drop in a vertical pipe in clean and fully-contaminated systems

    KURIMOTO Ryo, HAYASHI Kosuke, TOMIYAMA Akio

    May 2010, Proc. of International Conference on Multiphase Flow, ICMF2010, 11 pages

    [Refereed]

    International conference proceedings

  • LES-Based Bubble Tracking Simulation of Turbulent Cavitation Flow in Injector Nozzle

    SOU Akira, GOSHIMA Daisuke, KINUGASA Tomoyuki, HAYASHI Kosuke, TOMIYAMA Akio

    May 2010, Proceedings of 7th International Conference on Multiphase Flow, No. 2-1-2, English

    [Refereed]

    International conference proceedings

  • OHTA, Motoki, HOSOKAWA, Shigeo, HAYASHI, Kosuke, TOMIYAMA, Akio

    Mar. 2010, Japanese Journal of Multiphase Flow, Vol. 23, No. 5, pp. 547-554, Japanese

    [Refereed]

    Scientific journal

  • Kosuke Hayashi, Ryo Kurimoto, Akio Tomiyama

    Interface tracking simulations of single drops rising through a vertical pipe are carried out using three coordinate systems, i.e. cylindrical, general curvilinear and Cartesian coordinates, to investigate the effects of coordinate system and spatial resolution on the accuracy of predictions. Experiments of single drops in a vertical pipe are also conducted to obtain experimental data for comparisons with simulations. The drop shape observed are spheroidal and deformed spheroidal at low values of the diameter ratio, λ, of the sphere-volume equivalent diameter of a drop to the pipe diameter, whereas they take bullet-shapes at large λ. The conclusions obtained are as follows: (1) the effects of coordinate system on drop shape are small at low λ. At large λ, the effects are also small for drops in a low viscosity system, whereas non-physical shape distortion takes place when the Cartesian coordinates are used with low spatial resolution for drops in a high viscosity system, and (2) the drop terminal velocity and the velocity profile in the liquid film between a bullet-shaped drop and a pipe wall are well predicted using all the coordinate systems tested even at low spatial resolution.

    01 Mar. 2010, Journal of Computational Multiphase Flows, 2 (1), 47 - 57, English

    [Refereed]

    Scientific journal

  • Countercurrent Gas-Liquid Flow in a PWR Hot Leg under Reflux Cooling (II) Numerical Simulation of 1/15th Scale Air-Water Tests

    MINAMI Noritoshi, MURASE Michio, TOMIYAMA Akio

    Feb. 2010, Journal of Nuclear Science and Technology, Vol.47, No.2, pp.149-155, English

    [Refereed]

    Scientific journal

  • Countercurrent Gas-Liquid Flow in a PWR Hot Leg under Reflux Cooling (I) Air-Water Tests for 1/15th Scale-Down Model of a PWR Hot Leg

    MINAMI Noritoshi, NISHIWAKI Daisuke, NARIAI Toshifumi, TOMIYAMA Akio, MURASE Michio

    Feb. 2010, Journal of Nuclear Science and Technology, Vol.47, No.2, pp.142-148, English

    [Refereed]

    Scientific journal

  • Study on Counter-Current Flow in a PWR Hot Leg under Reflux Cooling

    MURASE Michio, TOMIYAMA Akio, MINAMI Noritoshi

    2010, Proc. of the 18th International Conference on Nuclear Engineering, 9 pages, CD-ROM

    [Refereed]

    International conference proceedings

  • Numerical Simulation of Countercurrent Gas-Liquid Flow in a PWR Hot Leg under Reflux Cooling

    KINOSHITA Ikuo, MURASE Michio, UTANOHARA Yoichi, MINAMI Noritoshi, TOMIYAMA Akio

    2010, Journal of Nuclear Science and Technology, Vol. 47, No. 10, pp. 963-972

    [Refereed]

    Scientific journal

  • Numerical Calculations for Steam-Water CCFL Tests Using the 1/3rd Scale Rectangular Channel Simulating a PWR Hot Leg

    KINOSHITA Ikuo, MURASE Michio, UTANOHARA Yoichi, LUCAS Dirk, VALLE Christophe, TOMIYAMA Akio

    2010, Proc. of the 8th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-8), N8P0044, 13 pages, CD-ROM

    [Refereed]

    International conference proceedings

  • Numerical Calculations for Air-Water Tests in Different-Scale Models of a PWR Hot Leg

    MURASE Michio, KINOSHITA Ikuo, UTANOHARA Yoichi, LUCAS Dirk, VALLE Christophe, TOMIYAMA Akio

    2010, Proc. of the 18th International Conference on Nuclear Engineering, 9 pages, CD-ROM

    [Refereed]

    International conference proceedings

  • Hybrid Simulation of Bubbly Flow and its Application to Poly-Dispersed Flow

    TOMIYAMA Akio

    2010, The 2nd Brazilian Meeting on Multiphase Flow

    International conference proceedings

  • Comparison of CCFL Experiments Performed in Two Different Models of the Hot Leg of a PWR with Rectangular Cross-Section

    VALLEE Christoph, SEIDEL Tobias, LUCAS Dirk, TOMIYAMA Akio, MICHIO Murase

    2010, Proc. of the 18th International Conference on Nuclear Engineering, 10 pages, CD-ROM

    [Refereed]

    International conference proceedings

  • Bubble Coalescence in a Slurry Bubble Column

    OBATA Satoshi, OJIMA Shinpei, HAYASHI Kosuke, TOMIYAMA Akio

    2010, The 8th Japan-UK Seminar on Multiphase Flow

    International conference proceedings

  • An Evolving Numerical Method for Designing Slurry Bubble Column Reactors

    TANAKA, Masahiro, HAYASHI, Kosuke, TOMIYAMA, Akio

    Jan. 2010, Kagaku-Kogaku, 36-1, 17-24, Japanese

    [Refereed]

    Scientific journal

  • Numerical Simulation of Poly-Dispersed Bubbly Flows in Bubble Columns using a Multi-Fluid Model

    TANAKA, Masahiro, HAYASHI, Kosuke, TOMIYAMA, Akio

    Nov. 2009, Transaction of the Japanese Society of Mechanical Engineers, 75-759, pp.2182-2189, Japanese

    [Refereed]

    Scientific journal

  • Modeling and Simulation of Bubbly Pipe Flow with Mass Transfer

    TOMIYAMA Akio

    Nov. 2009, Proc. ASME Int. Mechanical Eng. Congress & Exposition, p.1, English

    International conference proceedings

  • Multi-Fluid Simulation of Turbulent Bubbly Pipe Flows

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Oct. 2009, Chemical Engineering Science, Vol. 64, pp. 5308 - 5318, English

    [Refereed]

    Scientific journal

  • Application of Photobleaching Molecular Tagging Velocimetry to Turbulent Bubbly Flow in a Square Duct

    HOSOKAWA Shigeo, FUKUNAGA Takayuki, TOMIYAMA Akio

    Oct. 2009, Experiments in Fluids, Vol. 47, pp. 745 - 754, English

    [Refereed]

    Scientific journal

  • Pressure Drop in Two-Phase Swirling Flow in a Steam Separator

    KATAOKA Hironobu, SHINKAI Yusuke, TOMIYAMA Akio

    Sep. 2009, Proc. 13th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics, N13P1180, pp.1011, English

    [Refereed]

    International conference proceedings

  • ZHANG Zheng, HOSOKAWA Shigeo, HAYASHI Kosuke, TOMIYAMA Akio

    Sep. 2009, Journal of Power and Energy Systems, Vol. 3, No. 2, pp. 393 - 404, English

    [Refereed]

    Scientific journal

  • Numerical Calculations on Countercurrent Gas-Liquid Flow in a PWR Hot Leg (2) Steam-Water Flow under PWR Plant Conditions

    KINOSHITA Ikuo, UTANOHARA Yoichi, MURASE Michio, MINAMI Noritoshi, TOMIYAMA Akio

    Sep. 2009, Proc. 13th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics, N13P1040, pp.1-9, English

    [Refereed]

    International conference proceedings

  • Numerical Calculations on Countercurrent Gas-Liquid Flow in a PWR Hot Leg (1) Air-Water Flow in a 1/15th Scale-Model

    MINAMI Noritoshi, UTANOHARA Yoichi, KINOSHITA Ikuo, MURASE Michio, TOMIYAMA Akio

    Sep. 2009, Proc. 13th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics, N13P1038, pp.1-10, English

    [Refereed]

    International conference proceedings

  • Effects of Swirler Shape on Two-Phase Swirling Flow in a Steam Separator

    SHINKAI Yusuke, KATAOKA Hironobu, TOMIYAMA Akio

    Sep. 2009, Proc. 13th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics, N13P1182, pp.1-10, English

    [Refereed]

    International conference proceedings

  • Effects of Interfacial Friction Correlations on Numerical Calculations for Countercurrent Gas-Liquid Flow in a PWR Hot Leg

    UTANOHARA Yoichi, KINOSHITA Ikuo, MURASE Michio, MINAMI Noritoshi, TOMIYAMA Akio

    Sep. 2009, Proc. 13th Int. Topical Meeting on Nuclear Reactor Thermal Hydraulics, N13P1101, English

    [Refereed]

    International conference proceedings

  • Effects of Bubbles on Turbulence Properties in a Duct Flow

    HOSOKAWA Shigeo, SUZUKI Takashi, TOMIYAMA Akio

    Sep. 2009, 5th European-Japanese Two-Phase Flow Group Meeting, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Dissolution of Carbon Dioxide Bubbles in Clean and Contaminated Systems

    TOMIYAMA, Akio, ABE, Satoru, HAYASHI, Kosuke, HOSOKAWA, Shigeo

    Sep. 2009, 5th EuropeanTwo-Phase Flow Group Meeting, CD-ROM, 9 pages, English

    [Refereed]

    International conference proceedings

  • Dimensional Analysis of Terminal Velocityof a Taylor Bubble in a Vertical Pipe

    HAYASHI Kosuke, KURIMOTO Ryo, TOMIYAMA Akio

    Sep. 2009, 5th EuropeanTwo-Phase Flow Group Meeting, CD-ROM, 6 pages, English

    [Refereed]

    International conference proceedings

  • Distribution of Carbon Dioxide Bubbles in Clean and Contaminated Waters

    TOMIYAMA Akio, ABE Satoru

    Jul. 2009, Proc. 6th Int. Symp. Multiphase Flow, Heat Transfer and Energy Conversion, pp.1-12, English

    [Refereed]

    International conference proceedings

  • Dimensionless Numbers on Cavitation in a Nozzle of a Plain Orifice Atomizer

    SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2009, Proceedings of 11th International Conference on Liquid Atomization and Spray Systems (ICLASS 2009), ICLASS2009-019, pp. 1-7, English

    [Refereed]

    International conference proceedings

  • A Drag Correlation of Fluid Particles Rising Through Stagnant Liquids in Vertical Pipes at Intermediate Reynolds Numbers

    HAYASHI Kosuke, TOMIYAMA Akio

    Jun. 2009, Chemical Engineering Science, Vol. 64, Issue 12, pp. 3019-30

    [Refereed]

    Scientific journal

  • Progress in Computational Bubble Dynamics

    TOMIYAMA Akio

    May 2009, Proc. Int. Workshop on Multiphase Flows, Simulation, Experiment and Application, pp.1-15, English

    International conference proceedings

  • Counter-Current Two-Phase Flow in a Scale-Down Model of a PWR Hot Leg

    NARIAI Toshifumi, TOMIYAMA Akio

    May 2009, Proc. Int. Workshop on Multiphase Flows, Simulation, Experiment and Application, pp.1-12, English

    [Refereed]

    International conference proceedings

  • A Numerical Experiment of Consecutive Reactions in a Bubble Column

    SHIMADA Naoki, SAIKI Rina, TOMIYAMA Akio

    Apr. 2009, Kagaku Kogaku Ronbunshu, Vol.35, No.4, pp.339-2009, Japanese

    [Refereed]

    Scientific journal

  • OHTA Motoki, KAMEI Akihiro, MIZUTANI Yoshitaka, HOSOKAWA Shigeo, TOMIYAMA Akio

    Mar. 2009, Progress in Multiphase Flow Research, Vol. IV, pp. 61-68, Japanese

    [Refereed]

    Scientific journal

  • Swirling Annular Flow in a Steam Separator

    KATAOKA Hironobu, SHINKAI Yusuke, HOSOKAWA Shigeo, TOMIYAMA Akio

    Mar. 2009, Trans. ASME, Journal of Engineering for Gas Turbines and Power,, Vol. 131, Issue 3, 032904, English

    [Refereed]

    Scientific journal

  • Measurement of Micro Bubbles Generated by a Pressurized Dissolution Method

    HOSOKAWA Shigeo, TANAKA Kenzo, TOMIYAMA Akio, MAEDA Yasunari, YAMAGUCHI Shigeyuki, ITO Yoshihiro

    Mar. 2009, Journal of Physics: Conference Series, Volume 147, 2009, 012016, English

    [Refereed]

    International conference proceedings

  • Pressure Drop in Two-Phase Swirling Flow in a Steam Separator

    KATAOKA Hironobu, SHINKAI Yusuke, TOMIYAMA Akio

    2009, Journal of Power and Energy Systems, Vol.3, No.2, pp.382-391, English

    [Refereed]

    Scientific journal

  • Hybrid Multiphase-Flow Simulation of Bubble-Driven Flow in Complex Geometry Using an Immersed Boundary Approach

    TANAKA Masahiro, HAYASHI Kosuke, TOMIYAMA Akio

    2009, Multiphase Science and Technology, Vol. 21, No.1-2, pp. 141-155

    [Refereed]

    Scientific journal

  • Effects of Swirler Shape on Two-Phase Swirling Flow in a Steam Separator

    KATAOKA Hironobu, SHINKAI Yusuke, TOMIYAMA Akio

    2009, Journal of Power and Energy Systems, Vol.3, No.2, pp.347-355, English

    [Refereed]

    Scientific journal

  • Countercurrent Gas-Liquid Flow in a Rectangular Channel Simulating a PWR Hot Leg (2) (Analytical Evaluation of Countercurrent Flow Limitation)

    MINAMI Noritoshi, Murase Michio, NISHIWAKI Daisuke, TOMIYAMA Akio

    Dec. 2008, Japanese Journal of Multiphase Flow, 22巻, 4号, pp. 413-422, English

    [Refereed]

    Scientific journal

  • MINAMI Noritoshi, NISHIWAKI Daisuke, KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, MURASE Michio

    Dec. 2008, Japanese Journal of Multiphase Flow, 22巻, 4号, pp. 403-412, Japanese

    [Refereed]

    Scientific journal

  • Measurement of Micro Bubbles Generated by a Pressurized Dissolution Method

    HOSOKAWA Shigeo, TANAKA Kenzo, TOMIYAMA Akio, MAEDA Yasunari, YAMAGUCHI Shigeyuki, ITO Yoshiyasu

    Dec. 2008, The 6th International Symposium on Measurement Techniques for Multiphase Flows, Paper No. 027, English

    [Refereed]

    International conference proceedings

  • Modeling and Simulation of Poly-Dispersed Flows

    TOMIYAMA Akio

    Nov. 2008, Proc. ASME Int. Mech. Engng. Congress & Exposition, CD-ROM Paper No. IMECE2008-665, English

    International conference proceedings

  • Void Fraction in a Four by Four Rod Bundle Under a Stagnant Condition

    KAMEI Akihiro, MIZUTANI Yoshitaka, HOSOKAWA Shigeo, TOMIYAMA Akio, MURASE Michio

    Oct. 2008, The 7th International Topical Meeting on Nuclear Ractor Thermal Hydraulics, Operation and Safety (NUTHOS-7), CD-ROM, Paper 155, English

    [Refereed]

    International conference proceedings

  • Numerical Analyses of Countercurrent Air-Water Flow in a Circular Tube Simulating PWR Hot Leg

    MINAMI Noritoshi, MURASE Michio, UTANOHARA Yoichi, TOMIYAMA Akio

    Oct. 2008, Proc. 11th Int. Topical Mtg. Nuclear Reactor Thermal Hydraulics, Operation and Safety, CD-ROM, pp.1-14, English

    [Refereed]

    International conference proceedings

  • Counter-Current Air-Water Flow in a Scale-Down Model of a PWR Hot Leg

    NISHIWAKI Daisuke, TOMIYAMA Akio, HOSOKAWA Shigeo, MINAMI Noritoshi, MURASE Michio

    Oct. 2008, The 7th International Topical Meeting on Nuclear Ractor Thermal Hydraulics, Operation and Safety (NUTHOS-7), CD-ROM, Paper 154, English

    [Refereed]

    International conference proceedings

  • Counter-Current Air-Water Flow in a Scale-Down Model of a PWR Hot Leg

    NiSHIWAKI Daisuke, TOMIYAMA Akio, HOSOKAWA Shigeo, MINAMI Noritoshi, MURASE Michio

    Oct. 2008, 7th International Topical Meeting on Nuclear Ractor Thermal Hydraulics, Operation and Safety (NUTHOS-7), CD-ROM, Paper 154, English

    [Refereed]

    International conference proceedings

  • Measurement of Micro Bubbles Generated by a Pressurized Dissolution Method

    HOSOKAWA Shigeo, TANAKA Kenzo, TOMIYAMA Akio, MAEDA Yasunari, YAMAGUCHI Shigeyuki, ITO Yoshiyasu

    Sep. 2008, US-Japan Seminar on Two-Phase Flow, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Hybrid Multiphase Flow Simulation of Bubble-Driven Flow in Complex Geometry using an Immersed Boundary Approach

    TANAKA Masahiro, GOTO Jun, TOMIYAMA Akio

    Sep. 2008, Proc. 11th Int. Conf. Multiphase Flow in Industrial Plants, pp.13-21, English

    [Refereed]

    International conference proceedings

  • Hybrid Computational Multiphase Fluid Dynamics Method and its Application to Bubble Column

    TOMIYAMA Akio

    Sep. 2008, Proc. 11th Int. Conf. Multiphase Flow in Industrial Plants, pp.XVII-XXIV, English

    International conference proceedings

  • Flamelet movements in lean and rich methane-air and propane-air turbulent premixed flames

    HASHIMOTO Hideki, SOU Akira, TOMIYAMA Akio, FURUKAWA Junichi, WILLIAMS A Forman

    Aug. 2008, Transactions of the Japan Society of Mechanical Engineers, Vol. 74, No. 744, Ser. B, pp., Japanese

    [Refereed]

    Scientific journal

  • SOU Akira, Muhammad Ilham Maulana, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2008, Journal of Fluid Science and Technology, Vol. 3, No. 5, pp. 633-644, English

    [Refereed]

    Scientific journal

  • SOU Akira, Muhammad Ilham Maulana, ISOZAKI Kenji, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2008, Journal of Fluid Science and Technology, Vol. 3, No. 5, pp. 622-632, English

    [Refereed]

    Scientific journal

  • ABE Satoru Abe, OKAWA Hideaki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2008, Journal of Fluid Science and Technology, Vol. 3, No. 5, pp. 667-677, English

    [Refereed]

    Scientific journal

  • Single Drops Rising Through Stagnant Liquids in a Vertical Pipe

    HAYASHI Kosuke, YOSHIKAWA Yasuki, SOU Akira, TOMIYAMA Akio

    Jul. 2008, Proc. 5th International Conference on Transport Phenomena in Multiphase Systems, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Measurements of Turbulence Properties using Photo Bleaching Molecular Tagging Velocimetry

    HOSOKAWA Shigeo, FUKUNAGA Takayuki, TOMIYAMA Akio

    Jul. 2008, 14th International Symposium on Application of Laser Techniqes to Fluid Mechanics, Lisbon, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Cavitation in a Nozzle of an Atomizer and Its Effects on Liquid Jet

    SOU Akira, Muhammad Ilham Ma, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2008, Proc. 5th International Conference on Transport Phenomena in Multiphase Systems, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Effects of Inlet Bubble Diameter on Bubbly Flow in a Bubble Column under High Gas Volume Flux Condition

    MAEKAWA Munenori, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jun. 2008, Transactions of the Japan Society of Mechanical Engineers, Vol.74, No. 742, Ser. B, pp. 1, Japanese

    [Refereed]

    Scientific journal

  • KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira, CHAKI Masao

    Jun. 2008, Progress in Multiphase Flow Research, Vol. 3, pp. 67-74, Japanese

    [Refereed]

    Scientific journal

  • Effects of Water Contamination on Dissolution of a Carbon Dioxide Bubble in a Vertical Pipe

    ABE Satoru, OKAWA Hideaki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jun. 2008, Fifth International Conference on Transport Phenomena in Multiphase Systems, English

    [Refereed]

    International conference proceedings

  • Swirling Annular Flow in a Steam Separator

    KATAOKA Hironobu, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    May 2008, Proc. Proceedings of the 16th International Conference on Nuclear Engineering, CD-ROM, ICONE16-48077, English

    [Refereed]

    International conference proceedings

  • Motion of Small Bubbles Near a Grid Spacer in a Two by Three Rod Bundle

    ZHANG Zheng, SUZUKI Kana, HOSOKAWA Shigeo, TOMIYAMA Akio

    May 2008, 16th International Conference on Nuclear Engineering (ICONE-16), ICONE16‑48468, English

    [Refereed]

    International conference proceedings

  • ZHANG Zheng, SUZUKI Kana, HOSOKAWA Shigeo, TOMIYAMA Akio

    May 2008, Journal of Fluid Science and Technology, Vol. 3, No. 1, pp. 172-182, English

    [Refereed]

    Scientific journal

  • Experiments on Air-Water Countercurrent Flow in a Rectangular Duct Simulating PWR Hot Leg

    MINAMI Noritoshi, NISIWAKI Daisuke, KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, MURASE Michio

    May 2008, 16th International Conference on Nuclear Engineering (ICONE-16), ICONE16‑48113, English

    [Refereed]

    International conference proceedings

  • KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira, CHAKI Masao

    Apr. 2008, Journal of Power and Energy Systems, Vol. 2, No. 4, pp. 1120-1131, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Isothermal and Thermal Two-Phase Flows using Phase-Field Modeling

    TAKADA Naoki, TOMIYAMA Akio

    2008, International Journal of Modern Physics C, Vol.37, No.1, pp.79-89, English

    [Refereed]

    Scientific journal

  • Numerical Analyses for Counter Current Air-Water Tests with a Reduced Model of PWR Hot Leg using VOF Model

    MURASE Michio, MINAMI Noritoshi, UTANOHARA Yoichi, TOMIYAMA Akio

    2008, Proc. 6th Japan-Korea Symp. Nuclear Thermal Hydraulics and Safety, CD-ROM, pp.1-8, English

    [Refereed]

    International conference proceedings

  • Evaluation of Two-Phase Flow Characteristics in Steam Separator by using a CFD Code

    CHAKI Masao, KATONO Kenichi, KATAOKA Hironobu, TOMIYAMA Akio

    2008, Proc. Int. Congress on Advances in Nuclear Power Plants, pp.1824-1831, English

    [Refereed]

    International conference proceedings

  • Development of Three-Dimensional One-way Bubble Tracking Method for Boiling Flow

    TAMAI Hidesada, TOMIYAMA Akio

    2008, Journal of Power and Energy Systems, Vol.2, No.4, pp.295-305, English

    [Refereed]

    Scientific journal

  • Bubble Wake Disturbance of a Stratified Liquid Temperature Layer

    PERPAR M, Zun Iztok, Gregorc J, TOMIYAMA Akio

    2008, Proc. 46the European Two-Phase Flow Group Meeting, p.1, English

    International conference proceedings

  • A Numericsl Study on the Mechanism of Vapor Bubble Lift-off from a Flat Plate

    OKAWA Tomio, HAYASHI Kosuke, TOMIYAMA Akio

    2008, Proc. 6th Japan-Korea Symp. Nuclear Thermal Hydraulics and Safety, CD-ROM, pp.1-8, English

    [Refereed]

    International conference proceedings

  • HAYASHI Kosuke, SOU Akira, TOMIYAMA Akio

    Dec. 2007, Journal of Fluid Science and Technology, Vol. 2, No. 2, pp. 490-501, English

    [Refereed]

    Scientific journal

  • MAEKAWA Munenori, SHIMADA Naoki, SOU Akira, TOMIYAMA Akio

    Dec. 2007, Journal of Fluid Science and Technology, Vol. 2, No. 2, pp. 502-512, English

    [Refereed]

    Scientific journal

  • Diameters of Bubbles Released from Single Holes

    MAEKAWA Munenori, HOSOKAWA Shigeo, TOMIYAMA Akio

    Nov. 2007, Transactions of the Japan Society of Mechanical Engineers, B編, 73巻, 735号, pp. 2220-2226, Japanese

    [Refereed]

    Scientific journal

  • A Three-Dimensional PIV Using Intensity Gradients of a Two-Color Laser Beam

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Oct. 2007, Multiphase Science and Technology, Vol. 19, No. 3, pp. 269-285, English

    [Refereed]

    Scientific journal

  • (Inveted Lecture) Mechanism of Atomization Enhancement by Cavitation in a Nozzle

    SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    Oct. 2007, Proc. of Annual Conference of Institute for Liquid Atomization and Spray Systems -Korea 2007, pp. 9-14, English

    [Invited]

    International conference proceedings

  • Motion of Single Drops in Linear Shear Flows

    Win Myint, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2007, Proceedings of 5th Joint ASME/JSME Fluids Engineering Conference, CD-ROM, Paper No.FEDSM2007-374, English

    [Refereed]

    International conference proceedings

  • Akira Sou, Shigeo Hosokawa, Akio Tomiyama

    Cavitation in two-dimensional (2D) nozzles and liquid jet in the vicinity of the nozzle exit were visualized using high-speed cameras to investigate the effects of cavitation on liquid jet under various conditions of cavitation and Reynolds numbers sigma and Re. Liquid velocity in the nozzle was measured using a laser Doppler velocimetry to examine the effects of cavitation on the flow in the nozzle and liquid jet. As a result, the following conclusions were obtained: (1) cavitation in the nozzles and liquid jet can be classified into the four regimes: (no cavitation, wavy jet), (developing cavitation, wavy jet), (super cavitation, spray) and (hydraulic flip, flipping jet), (2) liquid jet near the nozzle exit depends on cavitation regime, (3) cavitation and liquid jet are not strongly affected by Re but by a, and (4) strong turbulence induced by the collapse of cavitation clouds near the exit plays an important role in ligament formation. (c) 2007 Elsevier Ltd. All rights reserved.

    PERGAMON-ELSEVIER SCIENCE LTD, Aug. 2007, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 50 (17-18), 3575 - 3582, English

    [Refereed]

    Scientific journal

  • Dissolution of a Carbon Dioxide Bubble in a Vertical Pipe

    ABE Satoru, OKAWA Hideaki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2007, Proceedings of 5th Joint ASME/JSME Fluids Engineering Conference, CD-ROM, Paper No.FEDSM2007-374, English

    [Refereed]

    International conference proceedings

  • Two-Phase Swirling Flow in a Gas-Liquid Separator

    KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira, CHAKI Masao

    Jul. 2007, Proc. 6th International Conference on Multiphase Flow, CD-ROM, Paper No. S6_Wed_C_40, English

    [Refereed]

    International conference proceedings

  • Two-Phase Swirling Flow Analysis of a Steam Separator

    KATONO Kenichi, CHAKI Masao, KATAOKA Hironobu, TOMIYAMA Akio

    Jul. 2007, Proc. International Conference on Multiphase Flow 2007 (ICMF 2007), CD-ROM, Paper No. S6_9, pp.1-8, English

    [Refereed]

    International conference proceedings

  • Numerical Simulation of Single Drops in a Vertical Pipe Using Various Coordinate Systems

    HIROKAWA Keishun, HAYASHI Kosuke, SOU Akira, TOMIYAMA Akio, TAKADA Naoki

    Jul. 2007, Proc. 5th Joint ASME/JSME Fluids Engineering Conference, CD-ROM, FEDSM2007-37491, English

    [Refereed]

    International conference proceedings

  • Numerical Prediction of Bubbly Flow in a Bubble Column with Chemisorption

    SHIMADA Naoki, TOMIYAMA Akio, OZAKI Tatsuya

    Jul. 2007, Proc. International Conference on Multiphase Flow 2007 (ICMF 2007), CD-ROM, Paper No. S6_Tue_D_28,, English

    [Refereed]

    International conference proceedings

  • Multi-Fluid Simulation of Turbulent Bubbly Pipe Flows

    HOSOKAWA Shigeo, SOU Akira, TOMIYAMA Akio

    Jul. 2007, Proc. International Conference on Multiphase Flow 2007 (ICMF 2007), CD-ROM, Paper No. S6_Thu_B_52, English

    [Refereed]

    International conference proceedings

  • Cavitation in Cylindrical Nozzles and Two-Dimensional Nozzles

    SOU Akira, Muhammad Ilham Maulana, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2007, Proc. International Conference on Multiphase Flow 2007 (ICMF 2007), CD-ROM, Paper No S4_Mon_C_5, English

    [Refereed]

    International conference proceedings

  • Cavitation in a Nozzle and Its Effects on Liquid Jet Atomization

    SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2007, Proc. Japan-UK Mini-Seminar on Multiphase Flow 2007, CD-ROM, pp. 1-21., English

    International conference proceedings

  • MIZUTANI Yoshitaka, TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira, KUDO Yoshiro, MISHIMA Kaichiro

    Jun. 2007, Journal of Nuclear Science and Technology, Vol. 44, No. 6, pp. 1-8, English

    [Refereed]

    Scientific journal

  • Multi-Fluid and Particle-Tracking Methods for Predicting Poly-Dispersed Flows (Keynote Lecture)

    TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira

    May 2007, Proc. 45th European Two-Phase Flow Group Meeting, p. 2, English

    [Refereed][Invited]

    International conference proceedings

  • ABE Satoru, NOZAWA Satoshi, HOSOKAWA Shigeo, TOMIYAMA Akio

    Apr. 2007, Progress in Multiphase Flow Research, Vol. 2, pp. 9-16, Japanese

    [Refereed]

    Scientific journal

  • OGAWA Kohei, Win Myint, HOSOKAWA Shigeo, TOMIYAMA Akio

    Apr. 2007, Progress in Multiphase Flow Research, Vol. 2, pp. 55-62, Japanese

    [Refereed]

    Scientific journal

  • Win Myint, HOSOKAWA Shigeo, TOMIYAMA Akio

    Apr. 2007, Journal of Fluid Science and Technology, Vol. 2, No. 1, pp. 184-195, English

    [Refereed]

    Scientific journal

  • TAKADA Naoki, TOMIYAMA Akio

    Mar. 2007, Progress in Multiphase Flow Research, Vol.II, pp.173-180, Japanese

    [Refereed]

    Scientific journal

  • Measurements of Rising Velocity of a Small Bubble in a Stagnant Fluid in One- and Two-Component Systems

    CELATA Gian Piero, DANNIBALE Francesco, DI MARCO Paolo, MEMOLI Gianlucca, TOMIYAMA Akio

    2007, Experimental Thermal and Fluid Science, Vol.31, pp.609-623, English

    [Refereed]

    Scientific journal

  • Mass Transfer in Carbon Dioxide - Water Bubbly Pipe Flow (Keynote Lecture)

    TOMIYAMA Akio, ABE Satoru, HOSOKAWA Shigeo

    2007, Proc. 18th Int. Symp. Transport Phenomena, pp.215-223, English

    International conference proceedings

  • Interface Tracking Simulation of Bubbles and Drops in Complex Geometries

    HAYASHI Kosuke, TOMIYAMA Akio

    2007, Multiphase Science and Technology, Vol.19, No.2, pp.121-140, English

    [Refereed]

    Scientific journal

  • Dissolution of Carbon Dioxide Bubbles in a Vertical Pipe (Plenary Lecture)

    TOMIYAMA Akio, ABE Satoru

    2007, Proc. 25th UIT National Heat Transfer Conference (CD-ROM), pp.1-8, English

    Scientific journal

  • MINAGAWA Hisato, SHAKUTSUI Hideaki, TOMIYAMA Akio

    2007, Journal of Fluid Science and Technology, Vol.2, No.1, English

    [Refereed]

    Scientific journal

  • Motion of Small Bubbles in High-Speed Flows in a Vertical Duct Containing an Obstacle

    Zhang Zheng, Shigeo Hosokawa, Hironobu Kataoka, Yasushi Makino, TOMIYAMA Akio

    Jan. 2007, Transactions of the Japan Society of Mechanical Engineers, B編, 73巻, 725号, pp. 162-168, Japanese

    [Refereed]

    Scientific journal

  • Motion of Small Bubbles near an Obstacle Placed in a Square Duct

    ZHENG Zhang, SUZUKI Kana, MAKINO Yaushi, HOSOKAWA Shigeo, TOMIYAMA Akio

    Dec. 2006, Proc. 5th International Symposium on Measurement Techniques for Multiphase Flows (5th ISMTMF), Vol. 1, pp. 45-50, English

    [Refereed]

    International conference proceedings

  • A Three-Dimensional PIV using Intensity Gradients of a Two-Color Laser Beam

    HOSOKAWA Shigeo, TOMIYAMA Akio, SAJI Akihiro

    Dec. 2006, 5th International Symposium on Measurement Techniques for Multiphase Flows (5th ISMTMF), Vol. 1, pp. 518-525, English

    [Refereed]

    International conference proceedings

  • Numerical Prediction of Heterogeneous Bubbly Flow Using a Multi-Fluid Model

    MAEKAWA Munenori, SHIMADA Naoki, SOU Akira, TOMIYAMA Akio

    Nov. 2006, 日本機械学会論文集, Vol. 72, No. 723, (B), pp. 268, Japanese

    [Refereed]

    Scientific journal

  • SOU Akira, TOMIYAMA Akio, HOSOKAWA Shigeo, NIGORIKAWA Shinji, MAEDA Tatsutoshi

    Nov. 2006, JSME International Journal, Vol. 49, No. 4, Ser. B, pp. 12, English

    [Refereed]

    Scientific journal

  • Qualitative Validity of Volume Tracking Simulation of Bubble Motion with Low Spatial Resolution

    HAYASHI Kosuke, SOU Akira, TOMIYAMA Akio

    Oct. 2006, 日本機械学会論文集, Vol. 72, No. 722, (B), pp. 241, Japanese

    [Refereed]

    Scientific journal

  • A Numerical Method for Two-Phase Flow Based on a Phase-Field Model

    TAKADA Naoki, TOMIYAMA Akio

    Oct. 2006, JSME Int. J. Ser. B, Vol.49, No.3, pp.636-643, English

    [Refereed]

    Scientific journal

  • HAYASHI Kosuke, TAKADA Naoki, TOMIYAMA Akio

    Sep. 2006, Japanese Journal of Multiphase Flow, 20巻3号, pp.244-251, Japanese

    [Refereed]

    Scientific journal

  • Interface Tracking Simulation of Bubbles and Drops in Complex Geometries

    HAYASHI, Kosuke, TOMIYAMA, Akio

    Sep. 2006, 4th Japanese-European Two-Phase Flow Group Meeting, CD-ROM (8 pages)

    [Refereed]

    International conference proceedings

  • Interface Tracking Simulation of Bubbles and Drops in Complex Geometries

    HAYASHI Kosuke, TOMIYAMA Akio

    Sep. 2006, Proc. 4th Japanese-European Two-Phase Flow Group Meeting, pp.1-7, English

    [Refereed]

    Scientific journal

  • HOSOKAWA Shigeo, TOMIYAMA Akio

    Sep. 2006, Journal of Fluid Science and Technology, Vol. 1, No. 2, pp. 94-104, English

    [Refereed]

    Scientific journal

  • A Three-Dimensional PIV using Intensity Gradients of a Two-Color Laser Beam

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Sep. 2006, 4th Europien-Japanese Two-Phase Flow Group Meeting, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Win Myint, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2006, Journal of Fluid Science and Technology, Vol. 1, No. 2, pp. 72-81, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Cavitating Flow in a Nozzle by One-Way Bubble Tracking Method

    Muhammad Ilham Maulana, SOU Akira, TOMIYAMA Akio

    Aug. 2006, Proc. 15th Indonesian Scientific Conference in Japan, CD-ROM, F0105, English

    [Refereed]

    International conference proceedings

  • Effects of Cavitation in a Nozzle on Liquid Jet Atomization

    SOU Akira, Muhammad Ilham Maulana, HOSOKAWA Shigeo, TOMIYAMA Akio

    Aug. 2006, Proc. 10th International Conference on Liquid Atomization and Spray Systems (ICLASS 2006), CD-ROM, ICLASS06-043, pp. 1-7, English

    [Refereed]

    International conference proceedings

  • Two-Phase Flow patterns in a Four by Four Rod Bundle

    MIZUTANI Yoshitaka, HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2006, Proc. 14th International Conference on Nuclear Engineering (ICONE-14), CD-ROM, Paper No. ICONE14-8933, English

    [Refereed]

    International conference proceedings

  • Numerical Simulation of Heterogeneous Bubbly Flow in a Bubble Column

    MAEKAWA Munenori, SHIMADA Naoki, KINOSHITA Koji, SOU Akira, TOMIYAMA Akio

    Jul. 2006, Proc. ASME Fluids Engineering Division Summer Meeting 2006, CD-ROM, FEDSM2006-98178, English

    [Refereed]

    International conference proceedings

  • A Volume Tracking Method Based on Non-Uniform Subcells and Continuum Surface Force Model Using a Local Level Set Function

    HAYASHI Kosuke, SOU Akira, TOMIYAMA Akio

    Jul. 2006, Computational Fluid Dynamics Journal, Vol. 15, Iss. 2, pp. 225-232, English

    [Refereed]

    Scientific journal

  • A Hybrid Method for Simulating Flows including Fluid Particles

    MAEDA Akiyoshi, SOU Akira, TOMIYAMA Akio

    Jul. 2006, Proc. ASME Fluids Engineering Division Summer Meeting 2006, CD-ROM, FEDSM2006-98156, English

    [Refereed]

    International conference proceedings

  • SAKODA Kenichi, SOU Akira, TOMIYAMA Akio

    Apr. 2006, Progress in Multiphase Flow Research, 1, pp. 163-170, Japanese

    [Refereed]

    Scientific journal

  • TAKADA Naoki, MISAWA Masaki, TOMIYAMA Akio

    Apr. 2006, Progress in Multiphase Flow, 1, Japanese

    [Refereed]

    Scientific journal

  • SOU Akira, Muhammad Ilham Maulana, HOSOKAWA Shigeo, TOMIYAMA Akio

    Apr. 2006, Progress in Multiphase Flow Research, Vol. 1, pp. 65-70, Japanese

    [Refereed]

    Scientific journal

  • Modeling and Hybrid Simulation of Bubbly Flow

    TOMIYAMA Akio, SAKODA Kenichi, HAYASHI Kosuke, SOU Akira, SHIMADA Naoki, HOSOKAWA Shigeo

    Mar. 2006, Multiphase Science and Technology, Vol.18, No.1, pp.73-110, English

    [Refereed]

    Scientific journal

  • Cavitation in a Two-Dimensional Nozzle and Liquid Jet Atomization (2nd Report, LDV Measurement of Liquid Velocity in a Nozzle)

    SOU Akira, TOMIYAMA Akio, HOSOKAWA Shigeo, NIGORIKAWA Shinji, MAEDA Tatsutoshi

    Feb. 2006, 日本機械学会論文集(B編), Vol. 72, No. 714, pp. 521-527, Japanese

    [Refereed]

    Scientific journal

  • Cavitation in a Two-Dimensional Nozzle and Liquid Jet Atomization (1st Report, Ultra-High Speed Visualization)

    SOU Akira, TOMIYAMA Akio, HOSOKAWA Shigeo, NIGORIKAWA Shinji, MATSUMOTO Yoichiro

    Feb. 2006, 日本機械学会論文集(B編), Vol. 72, No. 714, pp. 513-520., Japanese

    [Refereed]

    Scientific journal

  • Still Struggling with Computational Bubble Dynamics

    TOMIYAMA Akio

    2006, Proc. Int. Seminar on Multiphase Flow Phenomena, pp.1-7, English

    Scientific journal

  • Interface Tracking Simulation of Two-Phase Flows by Phase-Field Method

    TAKADA Naoki, TOMIYAMA Akio

    2006, Proc. ASME Joint U.S.-European Fluids Engineering Summer Meeting, pp.1-6, English

    [Refereed]

    Scientific journal

  • Effects of Inlet Bubble Size on Poly-Dispersed Bubbly Flow in a Bubble Column

    TOMIYAMA Akio, SOU Akira, HOSOKAWA Shigeo

    2006, Proc. 44th European Two-Phase Flow Group Meeting, pp.1-8, English

    [Refereed]

    International conference proceedings

  • Effect of Gas Injection Mode and Purity of Liquid on Bubble Rising in Two-Component Systems

    CELATA Gian Piero, CUMO Maurizio, D ANNIBALE Francesco, DI MARCO Paolo, TOMIYAMA Akio, ZOVINI Chiara

    2006, Experimental Thermal and Fluid Science, Vol.31, Issue 1, pp.37-53, English

    [Refereed]

    Scientific journal

  • Application of Interface-Tracking Method based on Phase-Field Model to Numerical Analysis of Free Surface Flow

    TAKADA Naoki, TOMIYAMA Akio

    2006, Theoretical and Applied Mechanics Japan, Vol.55, pp.149-156, English

    [Refereed]

    Scientific journal

  • A Phase-Field Method for Interface-Tracking Simulation of Two-Phase Flows

    TAKADA Naoki, MISAWA Masaki, TOMIYAMA Akio

    2006, Mathematics and Computers in Simulation, Vol.72, Issues 2-6, pp.220-226, English

    [Refereed]

    Scientific journal

  • A Hybrid Method for Predicting Dispersed Gas-Liquid and Liquid-Liquid Multi-Phase Flows

    SAKODA Kenichi, SOU Akira, TOMIYAMA Akio

    Dec. 2005, 日本機械学会論文集(B編), Vol. 71, No. 712, pp. 2884-289, Japanese

    [Refereed]

    Scientific journal

  • Application of a Two-Phase Flow Model based on Local Relative Velocity to Solid-Liquid Two-Phase Flows with Coarse Particles

    MINAGAWA Hisato, SHAKUTSUI Hideaki, 冨山 明男

    Sep. 2005, Transactions of the Japan Society of Mechanical Engineers, Ser. B, Vol.71, No.709, pp.2264-2271, Japanese

    [Refereed]

    Scientific journal

  • Toward Hybrid Simulation of Bubbly Flow (Invited Lecture)

    TOMIYAMA Akio, SAKODA Kenichi, HAYASHI Kosuke

    Sep. 2005, Proc. Int. Minisymposium on Challenger and Adavances in Flow SImulation and Modeling, p.276, English

    International conference proceedings

  • Dissolution of Carbon Dioxide in a CO2-Water Bubbly Upflow in a Vertical Pipe

    TOMIYAMA Akio, SHIMA Toshihide, HOSOKAWA Shigeo, SOU Akira

    Sep. 2005, Proc. Japan-UK Mini-Seminar on Multiphase Flow, pp.1-5, English

    International conference proceedings

  • LDV Measurement of Cavitating Flows in a Two-Dimensional Nozzle

    SOU Akira, TOMIYAMA Akio, HOSOKAWA Shigeo, NIGORIKAWA Shinji, MATSUMOTO Yoichiro

    Jun. 2005, Proc. International Symposium on Heat and Mass Transfer in Spray Systems, CD-ROM, #29, pp. 1-10., English

    International conference proceedings

  • A Volume Tracking Method based on Advanced Subgrid Counting Algorithm

    HAYASHI Kosuke, Win Myint, SOU Akira, TOMIYAMA Akio

    Jun. 2005, Proc. 2005 ASME Fluids Engineering Division Summer Meeting, CD-ROM, FEDSM2005-77396, English

    [Refereed]

    International conference proceedings

  • Molecular Tagging Velocimetry based on Photobleaching Reaction for Measuring Liquid Velocity and Velocity Gradients

    HOSOKAWA Shigeo, TOMIYAMA Akio

    May 2005, Proc. 13th International Conference on Nuclear Engineering, (CD-ROM), (CD-ROM), 1-10, English

    [Refereed]

    International conference proceedings

  • Measurement of Two-Phase Flow Patterns in a Four by Four Rod Bundle

    TOMIYAMA Akio, SOU Akira, HOSOKAWA Shigeo, MITSUHASHI Masao, NODA Kohei, TSUBO Yasushi, MISHIMA Kaichiro, KUDO Yoshiro

    May 2005, Proc. 13th International Conference on Nuclear Engineering, pp.1-8, English

    [Refereed]

    International conference proceedings

  • Computational Multiphase Fluid Dynamics for Gas-Liquid Systems (Keynote Lecture)

    TOMIYAMA Akio

    May 2005, Proc. 43rd European Two-Phase Flow Group Meeting, pp.1, English

    International conference proceedings

  • Numerical Simulation of Liquid Jet Deformation Based on Hybrid Combination of Interface Tracking and Bubble Tracking Methods

    SOU Akira, TOMIYAMA Akio

    Apr. 2005, Multiphase Science and Technology, Vol. 17, No. 1, pp. 23-41, English

    [Refereed]

    Scientific journal

  • Image Processing of Bubble Shape and Motion Based on Curvature Evaluation From Bubble Image

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Apr. 2005, Proc. 6th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ExHTF6), 1-8, English

    [Refereed]

    International conference proceedings

  • 島田 直樹, 冨山 明男

    2005, 化学工学論文集, 31-1,15-24, Japanese

    [Refereed]

    Scientific journal

  • Naoki Shimada, Akio Tomiyama, Munenori Maekawa, Tetsuya Suzuta, Tatsuya Ozaki

    An (N+2)-field model proposed in our previous study (Shimada and Tomiyama, 2005) was modified for application to compressible bubbly flows with chemisorption by taking into account the dependence of phase densities on components. Then, a numerical method for solving the modified (N+2)-field model was developed. The proposed method was verified through a sample calculation, i.e., a simulation of a bubbly flow with chemisorption in a rectangular vessel. Predictictions were compared with experiments. As a result, it was confirmed that the proposed method gave good predictions for the time evolutions of pH and gas holdup and for natural convection induced by the heat of reaction. Copyright © 2005 The Society of Chemical Engineers, Japan.

    2005, Kagaku Kogaku Ronbunshu, 31 (6), 377 - 387, Japanese

    [Refereed]

    Scientific journal

  • Cavitation and Internal Flow in a Two-Dimensional Injector Nozzle

    SOU Akira, TOMIYAMA Akio, HOSOKAWA Shigeo, NIGORIKAWA Shinji, MATSUMOTO Yoichiro

    Dec. 2004, Proc.6th US-Japan Seminar on Two-Phase Flow Dynamics, 1, 217-225, English

    [Refereed]

    International conference proceedings

  • A Volume Tracking Method for Multi-Phase Flow Simulation (Improvement of an Interface Reconstruction Method)

    宋 明良, 林 公祐, 冨山 明男

    Oct. 2004, 日本機械学会論文集(B編), 70-698, 2538-2544, Japanese

    [Refereed]

    Scientific journal

  • Effect of Bebble Size on a BebblePlume and Bubbly Flow in a Bubble Column

    MAEKAWA Munenori, TOMIYAMA Akio, KAGEYAMA Masato, YOSHIDA Satoru, SOU Akira, Zun Iztok

    Sep. 2004, 3rd Int.Symp.on Two-Phase Flow Modelling and Experimenntation, CD-ROM, English

    [Refereed]

    International conference proceedings

  • Visualization of Cavitation in a Two-Dimensional Nozzle and Liquid Jet

    SOU Akira, TOMIYAMA Akio, HOSOKAWA Shigeo, NIGORIKAWA Shinji, MATSTUMOTO Yoichiro

    May 2004, Proc. 5th International Conference on Multiphase Flow, Paper №479, pp.1-12, English

    [Refereed]

    International conference proceedings

  • 正方形ダクト内単一気泡の形状と上昇速度に関する研究

    中原 裕介, 冨山 明男, 細川 茂雄

    Feb. 2004, 日本機械学会論文集(B編), Vol.70,No.690,pp.356-362, Japanese

    [Refereed]

    Scientific journal

  • 統計熱力学的界面モデルを用いたせん断流中における液滴挙動の数値シミュレーション

    高田 尚樹, 冨山 明男

    2004, 日本機械学会論文集(B編), 70-699,2712-2720, Japanese

    [Refereed]

    Scientific journal

  • 三次元One-Way気泡追跡法に基づく未発達気泡・スラグ流の予測(第2報:実験結果と計算結果の比較)

    玉井 秀定, 冨山 明男

    2004, 日本機械学会論文集(B編), 70-692,888-895, Japanese

    [Refereed]

    Scientific journal

  • 鉛直円管内低粒子濃度固気二相流の乱流変調に及ぼす相関相対速度の影響

    細川 茂雄, 冨山 明男

    2004, 混相流, 18-3,255-262, Japanese

    [Refereed]

    Scientific journal

  • Turbulence modification in gas-liquid and solid-liquid despersed two-phase pipe flows

    HOSOKAWA Shigeo, TOMIYAMA Akio

    2004, International Jounal of Heat and Fluid Flow, 25-3,489-498, English

    [Refereed]

    Scientific journal

  • PHASE-FIELD MODELに基づく二相流数値計算手法

    高田 尚樹, 冨山 明男

    2004, 日本機械学会論文集(B編), 71-701,117-124, Japanese

    [Refereed]

    Scientific journal

  • Modelong and Hybrid Simulation of Bubbly Flow(Keynote Lecture)

    TOMIYAMA Akio, SAKODA Kenichi, HAYASHI Kosuke, SOU Akira, SHIMADA Naoki, HOSOKAWA Shigeo

    2004, Proc.6th US-Japan Seminar on Two-Phase Flow Dynamics, 1,1-16, English

    [Refereed]

    International conference proceedings

  • Modecular tagging velocimetry based on photobleaching feaction and it's application to flows around single fluid particles

    HOSOKAWA Shigeo, TOMIYAMA Akio

    2004, Multiphase Science and Technology, 16-4,335-353, English

    [Refereed]

    Scientific journal

  • Effect of Gas-Injection Mode and Purity of Liquid on Bubble Rising in Two-Component Systems

    Gian Piero Celata, Maurizio Cumo, Francesco D'Annibale, Paolo Di Marco, TOMIYAMA Akio, Chiara Zovini

    2004, Proc.5th Int.Conf.on Multiphase Flow(CD-ROM), 1-12, English

    [Refereed]

    International conference proceedings

  • Current Status of Generalized Boiling Transition Model Development Applicable to a Wide Variety of Fuel Bundle Geometry

    NINOKATA Hisashi, SADATOMI Michio, OKAWA Tomio, SERIZAWA Akimi, MISHIMA Kaichiro, KOSHIZUKA Seiichi, TOMIYAMA Akio, YAMAMOTO Yasushi, KUDO Yoshiro, HOTTA Akitoshi, NISHIDA Koji, SHIRAKAWA Noriyuki

    2004, Proc.6th Int.Conf.on Nuclear Thermal Hydraulics,Opereations and Safety(CD-ROM),Nara,Japan, P-ID:N6P363,1-18, English

    [Refereed]

    International conference proceedings

  • An image processing method for evaluating interface Curvature and its application to gas-liquid bubble flower in a vertical pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio

    2004, Proc.6th US-Japan Seminar on Two-Phase Flow Dynamics, 1,199-205, English

    [Refereed]

    International conference proceedings

  • 気泡塔内気泡流数値予測に必要となる相関式の感度解析

    島田 直樹, 冨山 明男, Iztok Zun, 浅野 浩幸

    Nov. 2003, 化学工学論文集, Vol.29,No.6,pp.778-786, Japanese

    [Refereed]

    Scientific journal

  • Two-Way Bubble Tracking Simulation of Void Wave Ceneration in a Bubbly Pipe Flow.

    TOMIYAMA Akio, SAKODA Kenichi, TAKADA Naoki

    Oct. 2003, Comp. Fluid Dynamics, J., Vol.12,No.3,pp.482-490, English

    [Refereed]

    Scientific journal

  • Numerical Simulation of Drops in a Shear Flow by a Lattice-Boltzmann Binary Fluid Model.

    TAKADA Naoki, TOMIYAMA Akio, HOSOKAWA Shigeo

    Oct. 2003, Comp. Fluid Dynamics, J., Vol.12,No.3,pp.475-481, English

    [Refereed]

    Scientific journal

  • 鉛直管内単一気泡の形状と上昇速度に関する研究

    中原 裕介, 冨山 明男

    Sep. 2003, 日本機械学会論文集(B編), Vol.69,No.685,pp.2002-2009, Japanese

    [Refereed]

    Scientific journal

  • The Wake Effect on the Rising Velocity of Small Bubbles.

    Gian Piero Celata, Marurizio Cumo, Francesco D'Annibale, TOMIYAMA Akio

    Sep. 2003, Proc. 3rd European-Japanese Two-Phase Flow Group Meeting., CD-ROM, English

    [Refereed]

    International conference proceedings

  • Numerical Simulation of Liquid Jet Deformation Based on Hybrid Combination of Interface and Bubble Tracking Methods.

    SOU Akira, TOMIYAMA Akio

    Sep. 2003, Proc. 3rd European-Japanese Two-Phase Flow Group Meeting., CD-ROM, English

    [Refereed]

    International conference proceedings

  • Bubble Rising Velocity in Two-Component Systems.

    Gian Piero Celata, Francesco D'Annibale, Paolo Di Marco, Walter Grassi, Gianlucca Memoli, TOMIYAMA Akio

    Sep. 2003, Proc. 3rd European-Japanese Two-Phase Flow Group Meeting., CD-ROM, English

    [Refereed]

    International conference proceedings

  • Lattice Boltzmann Simulation of Drops in a Shear Flow.

    TAKADA Naoki, TOMIYAMA Akio, HOSOKAWA Shigeo

    Jul. 2003, Proc. 4th ASMER-JSME Joint Fluids Engineering Conf., CD-ROM, English

    [Refereed]

    International conference proceedings

  • Application of Number Density Transport Equation to the Recovery of Consistency in Multi-Fluid Model.

    TOMIYAMA Akio, SHIMADA Naoki, ASANO Hiroyuki

    Jul. 2003, Proc. 4th ASMER-JSME Joint Fluids Engineering Conf., CD-ROM, English

    [Refereed]

    International conference proceedings

  • Influence of Electric Field on Single Gas-Bubble Growth and Detachment in Microgravity.

    Paolo Di Marco, Walter Grassi, Gianlucca Memoli, TAKAMASA Tomiji, TOMIYAMA Akio, HOSOKAWA Shigeo

    Apr. 2003, Int. J. Multiphase Flow, Vol.29,pp.559-578, English

    [Refereed]

    Scientific journal

  • Shapes and Rising Velocities of Single Bubbles rising through an Inner Subchannel

    TOMIYAMA Akio, NAKAHARA Yusuke, ADACHI Yoshihiro, HOSOKAWA Shigeo

    Mar. 2003, Journal of Nuclear Science and Technology, Vol. 40, No. 3, pp.136-142, English

    [Refereed]

    Scientific journal

  • An Interface Tracking Method based on Volume Tracking in Micro Cells embedded in Regular Computational Cells

    TOMIYAMA Akio, NAKAHARA Yusuke, HOSOKAWA Shigeo

    Mar. 2003, CFD Journal, Vol. 11. No. 4, pp. 411-419, English

    [Refereed]

    Scientific journal

  • 壁面近傍を上昇する単一非球形気泡に働く横方向力

    細川 茂雄, 冨山 明男

    2003, 日本機械学会論文集(B編), 69巻686号,pp.2214-2220, Japanese

    [Refereed]

    Scientific journal

  • 下降ー上昇傾斜管のV字部において発生する液体スラグの特性

    細川 茂雄, 冨山 明男

    2003, 日本機械学会論文集(B編), 69巻686号,pp.2214-2220, Japanese

    [Refereed]

    Scientific journal

  • Turbulence modification in gas-liquid and solid-liquid dispersed two-phase pipe flows.

    HOSOKAWA Shigeo, TOMIYAMA Akio

    2003, Turbulence and Shear Flow Phenomena-2003(TSFP-3), Vol.1,pp.191-196, English

    [Refereed]

    International conference proceedings

  • TOMIYAMA Akio, NAKAHARA Yusuke, ADACHI Yoshihiro, HOSOKAWA Shigeo

    2003, Journal Nuclear Science and Technology, 40(3), 330-341, English

    Scientific journal

  • HOSOKAWA Shigeo, MORIYAMA S, TOMIYAMA Akio, TAKADA N

    2003, Journal of Nuclear Science and Technology., Vol.40,No.10,pp.755-763, English

    [Refereed]

    Scientific journal

  • Measurement of Liquid Velocity around Single Bubbles Using Photobleaching.

    HOSOKAWA Shigeo, TOMIYAMA Akio

    2003, 3rd European-Japanese Two Phase Flow Group Meeting 2003, CD-ROM, English

    [Refereed]

    International conference proceedings

  • An Interface Tracking Method based on Volume Tracking in Micro Cells embadded in Regular Computational Cells

    TOMIYAMA Akio, NAKAHARA Yusuke, HOSOKAWA Shigeo

    2003, Computational Fluid Dynamics Journal, 11(4), 411-419, English

    Scientific journal

  • Two-way Bubble Tracking Simulation of Void Wave Generation in a Bubbly Pipe Flow

    TOMIYAMA Akio, SAKODA Kenichi, HOSOKAWA Shigeo

    Nov. 2002, Proc. 5th JSME-KSME Fluid Engineering Conference, English

    [Refereed]

    International conference proceedings

  • Lattice Boltzmann simulation of two-phase fluid motion

    TAKADA Naoki, TOMIYAMA Akio, HOSOKAWA Shigeo

    Nov. 2002, Proc. 5th JSME-KSME Fluid Engineering Conference, English

    [Refereed]

    International conference proceedings

  • Interface Tracking Simulation of Large Bubbles in Vertical Conduits

    TOMIYAMA Akio, NAKAHARA Yusuke, ADACHI Yoshihiro, HOSOKAWA Shigeo

    Nov. 2002, Proc. 5th JSME-KSME Fluid Engineering Conference, English

    [Refereed]

    International conference proceedings

  • Bubble-induced pseudo turbulence in a vertical pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio, KONDO Yuichi

    Nov. 2002, Proc. 5th JSME-KSME Fluid Engineering Conference, English

    [Refereed]

    International conference proceedings

  • Shape and Rising Velocities of Single Bubbles rising through an Inner Subchannel

    TOMIYAMA Akio, NAKAHARA Yusuke, ADACHI Yoshihiro, HOSOKAWA Shigeo

    Oct. 2002, Proc. Third Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety, NTHAS3, English

    [Refereed]

    International conference proceedings

  • PIV Measurement of Pressure Distributions about Single Bubbles

    HOSOKAWA Shigeo, MORIYAMA Satoshi, TOMIYAMA Akio, TAKADA Naoki

    Oct. 2002, Proc. Third Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety, NTHAS3, English

    [Refereed]

    International conference proceedings

  • Terminal Velocity of Single Bubbles in Surface Tension Force Dominant Regime

    TOMIYAMA Akio, Gian Piero Celata, HOSOKAWA Shigeo, YOSHIDA Satoru

    Sep. 2002, International Journal of Multiphase Flow, Vol. 28, Issue 9, pp. 1497-151, English

    [Refereed]

    Scientific journal

  • Interface Slip on Gas-Liquid Stratified Interface

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Jul. 2002, Transactions of the Japan Society of Mechanical Engineers, B編, 68巻,671号, pp.218-223, Japanese

    [Refereed]

    Scientific journal

  • Simulation of Interface Deformation in Shear Flow Using Binary Fluid Lattice Boltzmann Model

    TAKADA Naoki, TOMIYAMA Akio, HOSOKAWA Shigeo

    Jul. 2002, Proc. ASME FED Summer Meeting, 2002, FEDSM2002-31150, English

    [Refereed]

    International conference proceedings

  • Lateral Migration of Single Bubbles due to the Presence of Wall

    HOSOKAWA Shigeo, TOMIYAMA Akio, HAMADA Tomoki, MISAKI Shinji

    Jul. 2002, Proc. ASME FED Summer Meeting, 2002, FEDSM2002-31148, English

    [Refereed]

    International conference proceedings

  • Transverse Migration of Single Bubbles in Simple Shear Flows

    TOMIYAMA Akio, TAMAI Hidesada, Iztok Zun, HOSOKAWA Shigeo

    Jun. 2002, Chemical Engineering Science, Vol. 57, Issue 11, pp. 1849-18, English

    [Refereed]

    Scientific journal

  • Terminal Velocity of Single Bubbles in Infinite Stagnant Liquid

    TOMIYAMA Akio, HOSOKAWA Shigeo, YOSHIDA Satoru, Gian Piero Celata

    Oct. 2001, Proc. Conference on Transport Phenomena with Moving Boundaries, English

    [Refereed]

    International conference proceedings

  • 鉛直管内気液二相スラグ流における大気泡長さ、液体スラグ長さ、スラグユニット長さ並びにスラグ周期の推算式

    SAKAGUCHI Tadashi, HAMAGUCHI Hachiro, SHAKUTSUI Hideaki, TOMIYAMA Akio, MINAGAWA Hisato, HOSOKAWA Shigeo

    Sep. 2001, Japanese Journal of Multiphase Flow, Vol.15, No.3, pp.288-295, Japanese

    [Refereed]

    Scientific journal

  • Turbulence modification and Reynolds stresses in dispersed two-phase flows in vertical pipes

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Sep. 2001, Proc. U.K.- Japan Seminar on Two-phase Flow, English

    [Refereed]

    International conference proceedings

  • Surface Tension Force Dominant Regime Of Single Bubbles Rising Through Stagnant Liquids

    TOMIYAMA Akio, YOSHIDA Satoru, HOSOKAWA Shigeo

    Sep. 2001, Proc. U.K.- Japan Seminar on Two-phase Flow, English

    [Refereed]

    International conference proceedings

  • Detailed velocity measurement in the vicinity of stratified gas-liquid interface between gas and liquid phases using LDV

    HOSOKAWA Shigeo, ISHIDA Ken, TOMIYAMA Akio

    Aug. 2001, Proc. 3rd International Conference on Measurement Techniques for Multiphase Flows, pp. 158-164, English

    [Refereed]

    International conference proceedings

  • Velocity and Pressure Distributions around Large Bubbles rising through a Vertical Pipe

    TAMAI Hidesada, TOMIYAMA Akio, HOSOKAWA Shigeo

    Jun. 2001, Proc. International Conference on Multiphase Flow 2001, No.493, English

    [Refereed]

    International conference proceedings

  • Turbulence Modification of Gas-Liquid-Solid Three-Phase Bubbly Flow in a Vertical Pipe

    SHAKUTSUI Hideaki, SUYAMA Hiroshi, Ohashi Takakazu, HOSOKAWA Shigeo, TOMIYAMA Akio, SAKAGUCHI Tadashi

    Jun. 2001, Proc. International Conference on Multiphase Flow 2001, No.828, English

    [Refereed]

    International conference proceedings

  • Three-Dimensional Simulation of Bubble Motion by Lattice Boltzmann Method

    TAKADA Naoki, TOMIYAMA Akio, HOSOKAWA Shigeo

    Jun. 2001, Proc. ASME FED Summer Meeting, 2001, FEDSM2001-18179, English

    [Refereed]

    International conference proceedings

  • Terminal velocity of Single Bubbles in Surface Tension Dominant Regime

    TOMIYAMA Akio, Gian Piero Celata, HOSOKAWA Shigeo, YOSHIDA Satoru

    Jun. 2001, Proc. 39th European Two-Phase Flow Group Meeting, English

    [Refereed]

    International conference proceedings

  • Simulation of Two-Phase Fluid Motion by Lattice Boltzmann Method

    TAKADA Naoki, TOMIYAMA Akio, HOSOKAWA Shigeo

    Jun. 2001, Proc. International Conference on Multiphase Flow 2001, No.507, English

    [Refereed]

    International conference proceedings

  • Interface slip on a stratified gas-liquid interface

    HOSOKAWA Shigeo, TOMIYAMA Akio, ISHIDA Ken

    Jun. 2001, Proc. ASME FED Summer Meeting, 2001, FEDSM2001-18185, English

    [Refereed]

    International conference proceedings

  • Influence of electric field on single gas-bubble growth and detachment in microgravity

    Paolo Di Marco, Walter Grassi, HOSOKAWA Shigeo, Gianluca Memoli, TAKAMASA Tomoji, TOMIYAMA Akio

    Jun. 2001, Proc. 39th European Two-Phase Flow Group Meeting, English

    [Refereed]

    International conference proceedings

  • Correlations for Large Bubble Length, Liquid Slug Length, Slug Unit Length and Slug Period of Gas-Liquid Two-Phase Slug Flow in Vertical Pipes

    SAKAGUCHI Tadashi, HAMAGUCHI Hachiro, SHAKUTSUI Hideaki, TOMIYAMA Akio, MINAGAWA Hisato, HOSOKAWA Shigeo

    Jun. 2001, Proc. International Conference on Multiphase Flow 2001, No. 745, English

    [Refereed]

    International conference proceedings

  • Simulation of Bubble Motion under Gravity by Lattice Boltzmann Method

    TAKADA Naoki, MISAWA Masaki, TOMIYAMA Akio, HOSOKAWA Shigeo

    May 2001, Journal of Nuclear Science and Technology, Vol.38, No.5, pp. 330-341, English

    [Refereed]

    Scientific journal

  • Terminal Velocities of Single Spherical Particles Falling in a Water-Filled Vertical Pipe

    HOSOKAWA Shigeo, HAMADA Tomoyuki, TOMIYAMA Akio

    Dec. 2000, Transactions of the Japan Society of Mechanical Engineers, B編, 66巻,652号, pp.31-36, Japanese

    [Refereed]

    Scientific journal

  • LDV Measurement of Reynolds Stresses in Gas-Liquid Two-Phase Bubbly Flow in a Vertical Pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio, TAKESAKA Kenji, KONDO Yuichi

    Oct. 2000, Proc. 2nd Japan-korea Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS2), pp.247-252, English

    [Refereed]

    International conference proceedings

  • Influence of Frictional Pressure Gradient on Lateral Migration of Single Bubbles

    HAMADA Tomoyuki, HOSOKAWA Shigeo, MATSUI Shinji, TOMIYAMA Akio

    Oct. 2000, Space Forum (International Journal for Space Policy, Science & Technology for Industrial Applications), Vol. 6, pp. 65-74, English

    [Refereed]

    Scientific journal

  • Evaluation of Relative Velocity Between Single Bubble and Liquid in horizontal Turbulent Pipe Flow

    HAMADA Tomoyuki, HOSOKAWA Shigeo, TOMIYAMA Akio

    Oct. 2000, Proc. 4th JSME-KSME Thermal Engineering Conference, Vol.2, pp.599-604, English

    [Refereed]

    International conference proceedings

  • Characteristics of liquid Slug Generated at V-Shaped Elbows Between Inclined Pipes

    HOSOKAWA Shigeo, TOMIYAMA Akio, TORII Takeshi, MANABE Ryo

    Sep. 2000, Proc. 2nd European-Japanese Two-Phase Flow Group Meeting, English

    [Refereed]

    International conference proceedings

  • Measurement of Turbulence Structure in Dispersed Two-Phase Flows in a Vertical Pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Jun. 2000, Proc. Japan-US Seminar on Two-Phase Flow Dynamics, English

    [Refereed]

    International conference proceedings

  • Lattice Boltzmann Simulations of Bubble Flow

    TAKADA Naoki, MISAWA Masashi, TOMIYAMA Akio, HOSOKAWA Shigeo

    Jun. 2000, Proc. ASME Fluid Engineering, Summer Meeting, FEDSM11276, English

    [Refereed]

    International conference proceedings

  • Experimental Observation of Coalescence between Planar Bubbles

    HOSOKAWA Shigeo, TAKANO Masashi, TOMIYAMA Akio

    Jun. 2000, Proc. ASME Fluid Engineering, Summer Meeting, FEDSM11274, English

    [Refereed]

    International conference proceedings

  • Turbulence Modification in Dispersed Two-phase flow in a Vertical Pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Oct. 1999, Proc. Asian Symposium on Multiphase Flow, pp.63-68, English

    [Refereed]

    International conference proceedings

  • Terminal Velocities of Single Spherical Particles Falling in a Water-Filled Vertical Pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio, HAMADA Tomoyuki

    May 1999, Proc. Two-Phase Flow Modelling & Experimentation, Vol.2, pp.845-850, English

    [Refereed]

    International conference proceedings

  • Spatial Evolution of Developing Air-Water Bubble Flow in a Vertical Pipe

    TOMIYAMA Akio, TAMAI Hidesada, SHIMOMURA Hiroshi, HOSOKAWA Shigeo

    May 1999, Proc. Two-Phase Flow Modelling & Experimentation, Vol.2, pp.1027-1034, English

    [Refereed]

    International conference proceedings

  • Measurement of Transverse Migration of Single Bubbles in a Couette Flow

    TOMIYAMA Akio, Iztok Zun, TAMAI Hidesada, HOSOKAWA Shigeo, Okuda Takeo

    May 1999, Proc. Two-Phase Flow Modelling & Experimentation, Vol.2, pp.941-948, English

    [Refereed]

    International conference proceedings

  • Turbulence Modification Due to Bubbles and Particles in Dispersed Two-Phase Upflow in a Vertical Pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio

    Apr. 1999, Proc. 7th Int. Conf. on Nuclear Engineering, ICONE-7242, English

    [Refereed]

    International conference proceedings

  • Onset of Slugging of a residual stagnant liquid at a V-shaped portion of a pipeline

    MANABE Ryo, TOMIYAMA Akio, HOSOKAWA Shigeo, TORII Takeshi, HASEGAWA Masanobu

    Feb. 1999, Proc. of elce’99 (ASME 75th Anniversary conference, Energy Sources Technology Conference and Exhibition), English

    [Refereed]

    International conference proceedings

  • Influence of Frictional Pressure Gradient on Lateral Migration of Single Bubbles

    HAMADA Tomoyuki, HOSOKAWA Shigeo, TOMIYAMA Akio, MATSUI Shinji, SAKAGUCHI Tadashi

    Oct. 1998, Proc. Drop Tower Days in Hokkaido, pp. 40-42, English

    [Refereed]

    International conference proceedings

  • Turbulence Modification due to the Third Phase to Gas-Liquid and Liquid-Solid Two-Phase Flow

    SHAKUTSUI Hideaki, TOMIYAMA Akio, HOSOKAWA Shigeo, SAKAGUCHI Tadashi

    Jun. 1998, Proc. 3rd Int. Conf. on Multiphase Flow, English

    [Refereed]

    International conference proceedings

  • Influences of Relative Velocity on Turbulent Intensity in Gas-Solid Two-Phase Flow in a Vertical Pipe

    HOSOKAWA Shigeo, TOMIYAMA Akio, MORIMURA Masaru, FUJIWARA Shinya, SAKAGUCHI Tadashi

    Jun. 1998, Proc. 3rd Int. Conf. on Multiphase Flow, English

    [Refereed]

    International conference proceedings

  • Unintrusive Measurement of Phase Density Function and Velocity

    HOSOKAWA Shigeo, TOMIYAMA Akio, TAKESAKA Kenji, SAKAGUCHI Tadashi

    May 1998, Proc. European-Japanese Two-Phase Flow Group Meeting, English

    [Refereed]

    International conference proceedings

  • Three Dimensional Distribution of Liquid Velocity of Gas-Liquid Two-Phase Slug Flow in Horizontal Pipes

    HOSOKAWA Shigeo, SAKAGUCHI Tadashi, TOMIYAMA Akio, HAMADA Kazuaki, MANABE Ryo

    Sep. 1997, Proc. 2nd Japanese-GermanSymp. on Multi-Phase Flow, pp. 97-106, English

    [Refereed]

    International conference proceedings

  • Measurement of Flow Field Around a Solid Particle Using Photochromic Dye

    HOSOKAWA Shigeo, TOMIYAMA Akio, MIZUSHIMA Seijiro, SAKAGUCHI Tadashi

    Jun. 1997, Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1997, Vol. 1, pp. 51-58, English

    [Refereed]

    International conference proceedings

  • Lateral Migration of Single Bubbles in a Laminar Duct Flow under Normal and Micro Gravity Conditions

    SAKAGUCHI Tadashi, TOMIYAMA Akio, Iztok Zun, HOSOKAWA Shigeo

    Jun. 1997, Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1998, English

    [Refereed]

    International conference proceedings

  • 狭平行平板内静止液中単一空気泡の終端速度と抗力係数

    TOMIYAMA Akio, HOSOKAWA Shigeo, EBARA Masahiko, MIYAMAGA Yoshiharu, KAWAKUBO Yoshio, KINOTO Hiroshi

    Jun. 1996, 混相流, 第10巻第2号, pp. 146 - 154, Japanese

    [Refereed]

    Scientific journal

MISC

  • 時空間フィルタ流速計による界面近傍の流れの計測

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本流体力学会, Oct. 2017, ながれ, 36 (5), 303 - 308, Japanese

    [Refereed][Invited]

    Introduction scientific journal

  • 時空間フィルタ流速計による単一液滴に作用する界面せん断応力の評価

    HOSOKAWA SHIGEO, KITAHATA KYOSUKE, HAYASHI KOSUKE, TOMIYAMA AKIO

    日本流体力学会, Dec. 2014, ながれ, 33 (6), 509 - 512, Japanese

    [Refereed][Invited]

    Report scientific journal

  • フォトブリーチング分子タグ法による乱れエネルギ収支の評価

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会流体工学部門, Dec. 2013, 日本機械学会流体工学部門「今この論文が熱い!」, Japanese

    [Invited]

    Introduction other

  • 三次元One-Way気泡追跡法に基づく未発達気泡・スラグ流の予測(第1報:モデル及び計算例)

    玉井 秀定, 冨山 明男

    2004, 日本機械学会論文集(B編), 70-692,880-887, Japanese

    [Refereed]

    Others

  • The Wake Effect on the Rising Velocity of Small Bubbles

    Gian Piero Celata, Maurizio Cumo, Francesco D' Annibale, Tomiyama Akio

    2004, 42nd European Two-Phase Flow Group Meeting,Jenova,Italy, 1-10, English

    [Refereed]

    Others

  • The Wake Effect on Bubble Rising Velocity in One-Component Systems

    Gian Piero Celata, Maurizio Cumo, Francesco D'Annibale, TOMIYAMA Akio

    2004, Int.J.Multiphase Flow, 30,939-961, English

    [Refereed]

    Others

  • Effect of Gas Injection Mode and Purity of Liquid on Bubble Rising in Two-Component Systems

    Gian Piero Celata, Maurizio Cumo, Francesco D' Annibale, Paolo Di Marco, Tomiyama Akio, Chiara Zovini

    2004, 42nd European Two-Phase Flow Group Meeting,Jenova,Italy, 1-15, English

    [Refereed]

    Others

  • Drag, Lift and Virtual Mass Forces acting on a Single Bubble

    Tomiyama Akio

    2004, 3rd Int.Symp.on Two-Phase Flow Modelling and Experimentation(CD-ROM),Pisa,Italy, 1-10, English

    [Refereed]

    Others

  • Bubble Rising Velocity in One and Two-Component Systems

    Gian Piero Celata, Francesco D' Annibale, Paolo Di Marco, Water Grassi, Gianlucca Memori, Tomiyama Akio

    2004, 42nd European Two-Phase Flow Group Meeting,Jenova,Italy, English

    [Refereed]

    Others

  • A Simple Method for Evaluating Fluctuating Bubble velicity and its Application to a Hybrid Bubble Tracking Method

    Tomiyama Akio, SAKODA Kenichi, Gian Piero Celata, Iztok Zun

    2004, 3rd Int.Symp.on Two-Phase Flow Modelling and Experimentation(CD-ROM),Pisa,Italy, 1-10, English

    [Refereed]

    Others

Books etc

  • 微細気泡の最新技術 Vol.2

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    Others, エヌ・ティー・エス, Aug. 2014, Japanese, ISBN: 9784860434076

    Scholarly book

  • Handbook of Gas-Liquid Two-Phase Flow Technology 2nd Ed.

    TOMIYAMA Akio

    Joint work, CORONA Publishing Co., Ltd., Jun. 2006, Japanese

    Scholarly book

  • 数値流体力学ハンドブック

    小林 敏雄, 松本 洋一郎, 冨山 明男

    Joint work, 丸善, 2003, Japanese

    Scholarly book

  • 混相流計測法/日本原子力学会編

    小泉 安郎, 冨山 明男, その他共著者

    Joint work, 森北出版, 2003, Japanese

    Scholarly book

Presentations

  • Three-Dimensional Flow Characteristics around a Bulge Structure in a Cavity Swept by a Viscoelastic Fluids

    SUZUKI Hiroshi, KAWATA Masaki, HIDEMA Ruri, HOSOKAWA Shigeo, HAYASHI Kosuke, TOMIYAMA Akio

    Annual European Rheology Conference 2019 (AERC 2019), Apr. 2019, English, Portorož, Slovenia, International conference

    Oral presentation

  • 単一液滴に作用する力の実験的分析

    SHIGEKANE GAKU, HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    第95期日本機械学会流体工学部門講演会, Nov. 2018, Japanese, 日本機械学会, Muroran, Domestic conference

    Poster presentation

  • 可溶性界面活性剤により汚染された球形液滴の数値シミュレーション

    HAYASHI KOSUKE, SAKAI KOHEI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本流体力学会年会2018, Sep. 2018, Japanese, 大阪大学, Domestic conference

    Oral presentation

  • 上端シャープエッジ鉛直管における気液二相対向流の界面及び壁面摩擦係数

    SHIMAMURA TAKEYUKI, GODA RAITO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, MURASE MICHIO, NISHIDA KOJI, TOMIYAMA AKIO

    混相流シンポジウム2018, Aug. 2018, Japanese, 仙台, Domestic conference

    Oral presentation

  • 鉛直円管内単一二酸化炭素気泡の物質移動に及ぼすアルコールと電解質の相互作用の影響

    HIROTA YUTAKA, HORI YOHEI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2018, Aug. 2018, Japanese, 仙台, Domestic conference

    Oral presentation

  • Generation of micro-bubbles by means of subcooled boiling

    HOSOKAWA SHIGEO, YOSHIDA MASATAKA, TOMIYAMA AKIO, MAEDA YASUNARI, AKITA TOMOHIRO

    混相流シンポジウム2018, Aug. 2018, Japanese, 日本混相流学会, Sendai, Domestic conference

    Oral presentation

  • U字管内気液二相流の圧力損失に及ぼす液相粘度の影響

    HAYASHI KOSUKE, SUZUKI DAIKI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2018, Aug. 2018, Japanese, 仙台, Domestic conference

    Oral presentation

  • Effect of Micro-Bubbles on Heat Transfer During Quenching of High Temperature Sphere

    HOSOKAWA SHIGEO, FUKUDA RYU, TOMIYAMA AKIO, TOSHIMA MASATAKE

    第23回動力・エネルギー技術シンポジウム, Jun. 2018, Japanese, 日本機械学会動力エネルギーシステム部門, Ube, Domestic conference

    Oral presentation

  • Generation method of micro-bubbles by means of cyclic heating

    YOSHIDA MASATAKA, HOSOKAWA SHIGEO, TOMIYAMA AKIO, MAEDA YASUNARI

    混相流シンポジウム2017, Aug. 2017, Japanese, 日本混相流学会, Tokyo, Domestic conference

    Oral presentation

  • 気泡による微細粒子輸送に関する研究

    KANG JYUNGYU, HAYASHI KOSUKE, TOMIYAMA AKIO, TAGUCHI KENJI, TSUKAGUCHI YUICHI

    混相流シンポジウム2017, Aug. 2017, Japanese, 東京, Domestic conference

    Oral presentation

  • 鉛直円管内旋回気液二相流の圧力損失に関する研究

    FUNAHASHI HAYATO, KINOSHITA HIROHITO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2017, Aug. 2017, Japanese, 東京, Domestic conference

    Oral presentation

  • U字管内気液二相流の圧力損失に関する研究

    SUZUKI DAIKI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2017, Aug. 2017, Japanese, 東京, Domestic conference

    Oral presentation

  • 二相流数値計算検証のための実験計測

    HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    日本機械学会研究分科会RC270第3回分科会, Dec. 2016, Japanese, 日本機械学会, Tokyo, Domestic conference

    Nominated symposium

  • 時空間フィルタ流速計による界面活性剤の吸着を伴う液滴の測定

    HOSOKAWA SHIGEO, MASUKURA YUYA, HAYASHI KOSUKE, TOMIYAMA AKIO

    第94期日本機械学会流体工学部門講演会, Nov. 2016, Japanese, Domestic conference

    Oral presentation

  • Turbulence Kinetic Energy Budget in Bubbly Upflow in a Vertical Duct

    IWAI RYOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本流体力学会年会2016, Sep. 2016, Japanese, 日本流体力学会, Nagoya, Domestic conference

    Oral presentation

  • 塔径及び初期液位が気泡塔内平均ボイド率に及ぼす影響

    内田 賢吾, 橋田 昌明, 佐々木 翔平, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2016, Aug. 2016, Japanese, Domestic conference

    Oral presentation

  • 静止液中単一気泡の形状に及ぼす界面活性剤の影響に関する研究

    竹川 稔彦, 青山 昌平, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2016, Aug. 2016, Japanese, Domestic conference

    Oral presentation

  • Shapes of single bubbles in infinite stagnant liquids contaminated with surfactant

    TAKEGAWA TOSHIHIKO, AOYAMA SHOHEI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2016, Aug. 2016, Japanese, Domestic conference

    Oral presentation

  • 鉛直円管内電解質水溶液中単一二酸化炭素気泡の物質移動に関する研究

    堀 陽平, 青木 二郎, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2016, Aug. 2016, Japanese, Domestic conference

    Oral presentation

  • U字管内気液二相流の圧力損失に関する研究

    宮地 祥人, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO, 舘山 将也, 廣津 誠, 竹田 信宏

    混相流シンポジウム2016, Aug. 2016, Japanese, Domestic conference

    Oral presentation

  • 散気管内外の流れに散気孔の周方向角度が及ぼす影響

    SATO RYO, MIYAYOSHI TATSUYA, HAYASHI KOSUKE, TOMIYAMA AKIO

    日本機械学会関西支部第91期定時総会講演会, pp. 129-132, Mar. 2016, Japanese, 大阪, Domestic conference

    Oral presentation

  • 埋め込み境界-熱流動格子ボルツマン法における熱流束境界条件の精度に及ぼす二緩和時間衝突則の影響

    SETA TAKESHI, HAYASHI KOSUKE, TOMIYAMA AKIO

    第29回数値流体力学シンポジウム, Dec. 2015, Japanese, 九州大学筑紫キャンパス, Domestic conference

    Oral presentation

  • Reduction of the Temperature Jump in the Immersed Boundary-Thermal Lattice Boltzmann Method

    SETA TAKESHI, HAYASHI KOSUKE, TOMIYAMA AKIO

    American Physical Society 68th Annual DFD Meeting, Nov. 2015, English, Boston,Massachusetts, U.S.A., International conference

    Oral presentation

  • Turbulence Properties of Bubbly Flow in a 2x2 Rod Bundle

    HOSOKAWA SHIGEO, TSUDA MITSUHIKO, OGAWA YUMA, TOMIYAMA AKIO

    第93期日本機械学会流体工学部門講演会, Nov. 2015, Japanese, 日本機械学会流体工学部門, Tokyo, Domestic conference

    Oral presentation

  • Spatiotemporal Filter Velocimetry and Its Applications

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会2015年度年次大会, Sep. 2015, Japanese, 日本機械学会, Sapporo, Domestic conference

    [Invited]

    Nominated symposium

  • 境界適合型時空間フィルタ流速計と界面活性剤濃度評価の試み

    HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    日本機械学会研究分科会RC263第6回分科会, Sep. 2015, Japanese, 日本機械学会, Tokyo, Domestic conference

    Nominated symposium

  • Study on adsorption of surfactant at interface of a spherical drop

    MASUKURA YUYA, HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    日本流体力学会年会2015, Sep. 2015, Japanese, 日本流体力学会, Tokyo, Domestic conference

    Oral presentation

  • 二緩和時間衝突則に基づく埋め込み境界法を適用した熱流動格子ボルツマン法

    SETA TAKESHI, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2015, Aug. 2015, Japanese, 高知工科大学, Domestic conference

    Oral presentation

  • Evaluation of Marangoni Stress Acting on a Single Contaminated Spherical Drop

    MASUKURA YUYA, HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2015, Aug. 2015, Japanese, Kochi, Domestic conference

    Oral presentation

  • 一様せん断流中単一気泡に働く揚力に関する研究

    AOYAMA SHOHEI, TAKEGAWA TOSHIHIKO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2015, Aug. 2015, Japanese, 高知, Domestic conference

    Oral presentation

  • サブクール水中における蒸気凝縮音に関する研究

    IKEUCHI KAZUTAKA, TATEYAMA MASAYA, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO, HIROTSU MAKOTO, TAKEDA NOBUHIRO

    混相流シンポジウム2015, Aug. 2015, Japanese, 高知, Domestic conference

    Oral presentation

  • Effects of liquid-separation components on two-phase swirling flow in a steam separator

    KATONO KENICHI, FUNAHASHI HAYATO, HOSOKAWA SHIGEO, HAYASHI KOSUKE, TOMIYAMA AKIO

    第20回動力・エネルギー技術シンポジウム, Jun. 2015, Japanese, 日本機械学会動力エネルギーシステム部門, Sendai, Domestic conference

    Oral presentation

  • Turbulence Characteristics of Gas-Liquid Two-Phase Bubbly Flow in a 2x2 Rod Bundle

    TSUDA MITSUHIKO, OGAWA YUMA, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    第21回動力・エネルギー技術シンポジウム, Jun. 2015, Japanese, 日本機械学会動力エネルギーシステム部門, Yokohama, Domestic conference

    Oral presentation

  • Velocity distribution of gas-liquid two-phase bubble flow in a 2x2 rod bundle

    TSUDA MITSUHIKO, OGAWA YUMA, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    第20回動力・エネルギー技術シンポジウム, Jun. 2015, Japanese, 日本機械学会動力エネルギーシステム部門, Sendai, Domestic conference

    Oral presentation

  • 冷却材喪失事故時の格納容器内温度シミュレーションモデルの検証;(2)空気及び蒸気吹込み実験

    野末 貴大, 藤井 雄基, HAYASHI KOSUKE, 細川 茂雄, 冨山 明男, 歌野原 陽一, 山本 泰功, 村瀬 道雄

    日本原子力学会 春の大会 2015, Mar. 2015, Japanese, 茨城, Domestic conference

    Oral presentation

  • Reduction of the velocity slips by the immersed boundary-lattice Boltzmann method

    SETA TAKESHI, ROJAS ROBERT, HAYASHI KOSUKE, TOMIYAMA AKIO

    日本機械学会流体工学部門講演会, Oct. 2014, Japanese, 富山, Domestic conference

    Oral presentation

  • 鉛直ダクト内気泡流における乱れエネルギ収支計測

    KARASAWA HIROKI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    第92期流体工学部門講演会, Oct. 2014, Japanese, 日本機械学会, 富山県富山市, Domestic conference

    Oral presentation

  • 時空間フィルタ流速計による単一液滴に作用する界面せん断応力の評価

    HOSOKAWA SHIGEO, KITAHATA KYOSUKE, HAYASHI Kosuke, TOMIYAMA AKIO

    日本流体力学会年会2014, Sep. 2014, Japanese, 日本流体力学会, 宮城県仙台市, Domestic conference

    Oral presentation

  • 時空間フィルタ流速計による界面近傍速度測定

    HOSOKAWA SHIGEO, KITAHATA KYOSUKE, HAYASHI Kosuke, TOMIYAMA AKIO

    理論応用力学講演会, Sep. 2014, Japanese, 日本学術会議, 東京都, Domestic conference

    Oral presentation

  • 非一様電場におけるオリフィスからの気泡成長

    KURIMOTO RYO, DI MARCO PAOLO, MINAGAWA HISATO, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2014, E151, USB Memory (2 pages), Jul. 2014, Japanese, 札幌, Domestic conference

    Oral presentation

  • 固体壁に付着した液滴に及ぼす界面活性剤の影響に関する研究

    KITANO MASAAKI, ABHINAV DHAR, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2014, A311, USB Memory (2 pages), Jul. 2014, Japanese, 札幌, Domestic conference

    Oral presentation

  • 加圧溶解型微細気泡発生法におけるサブミクロン気泡の発生

    BABA YUJI, HOSOKAWA SHIGEO, TOMIYAMA AKIO, ITO Yoshihiro, MAEDA Yasunari

    混相流シンポジウム2014, Jul. 2014, Japanese, 日本混相流学会, Sapporo, Domestic conference

    Oral presentation

  • 汚れ系における気泡の界面追跡計算と物質移動

    HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2014, B331, USB Memory (2 pages), Jul. 2014, Japanese, 札幌, Domestic conference

    Keynote oral presentation

  • スラリー気泡塔内平均ボイド率に及ぼす初期液位の影響

    SASAKI SHOHEI, OJIMA SHIMPEI, HAYASHI KOSUKE, TOMIYAMA AKIO

    混相流シンポジウム2014, A311, USB Memory (2 pages), Jul. 2014, Japanese, Domestic conference

    Oral presentation

  • スラリー気泡塔における気泡合体に粒子径が及ぼす影響

    OJIMA SHIMPEI, SASAKI SHOHEI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    混相流シンポジウム2014, B232, USB Memory (2 pages), Jul. 2014, Japanese, 札幌, Domestic conference

    Oral presentation

  • U字ベンドにおける空気水系気液二相流の圧力損失に関する研究

    KOBAYASHI SHINGO, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO, 廣津 誠, 舘山 将也, 竹田 信宏

    混相流シンポジウム2014, B223, USB Memory (2 pages), Jul. 2014, Japanese, 札幌, Domestic conference

    Oral presentation

  • 2x2ロッドバンドル内気液二相流の液相速度測定

    OGAWA YUMA, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    The 19th National Symposium on Power and Energy Systems (SPES2014), Jun. 2014, Japanese, 日本機械学会, Fukio, Domestic conference

    Oral presentation

  • 散気管内外の流れに及ぼす液相粘度の影響

    SAMPEI TOMOYUKI, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO, HLWAN MOE ZAW

    日本機械学会関西支部定時総会・講演会2014, Mar. 2014, Japanese, 大阪府立大学, Domestic conference

    Oral presentation

  • 一様せん断流中単一気泡に働く揚力に関する研究 (第2 報 数値計算)

    HAMADA TAKESHI, MATSUNAGA AKIRA, HAYASHI KOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会関西支部定時総会・講演会2014, Mar. 2014, Japanese, 大阪府立大学, Domestic conference

    Oral presentation

  • 一様せん断流中単一気泡に働く揚力に関する研究(第 1 報 実験)

    MATSUNAGA Akira, HAMADA Takeshi, HOSOKAWA SHIGEO, HAYASHI Kosuke, TOMIYAMA AKIO

    日本機械学会 関西支部第89期定時総会講演会, Mar. 2014, Japanese, 日本機械学会関西支部, 大阪, Domestic conference

    Oral presentation

  • リフラックス冷却における蒸気発生器U字管での熱流体挙動(7)逆U字管での凝縮実験

    NOZUE Takahiro, FUJII YUKI, DOI TAIGA, HOSOKAWA SHIGEO, TOMIYAMA AKIO, KUSUNOKI Kiyoshi, MURASE MICHIO

    日本原子力学会2014年春の大会, Mar. 2014, Japanese, 日本原子力学会, 東京, Domestic conference

    Oral presentation

  • 流速測定における新しいアプローチ—Imaging Spatial Filter Velocimetry (iSFV)—

    HOSOKAWA SHIGEO, TOMIYAMA Akio

    関西伝熱セミナー, Sep. 2013, Japanese, 神戸, Domestic conference

    [Invited]

    Invited oral presentation

  • 空間フィルタ流速計による単一液滴内外速度の測定

    KITAHATA KYOSUKE, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本流体力学会年会2013, Sep. 2013, Japanese, 日本流体力学会, 東京, Domestic conference

    Oral presentation

  • 気水分離器内旋回二相流に関する研究 (2) ピックオフリングの改良

    TAMAU Hayato, MIKA Takeshi, HOSOKAWA SHIGEO, TOMIYAMA Akio

    日本原子力学会2013年秋の大会, Sep. 2013, Japanese, 日本原子力学会, 八戸, Domestic conference

    Oral presentation

  • 気水分離器内旋回二相流に関する研究 (1) 流動と分離特性

    MIKA Takeshi, TAMAU Hayato, HOSOKAWA SHIGEO, TOMIYAMA Akio

    日本原子力学会2013年秋の大会, Sep. 2013, Japanese, 日本原子力学会, 八戸, Domestic conference

    Oral presentation

  • リフラックス冷却における蒸気発生器U字管での熱流体挙動(4)下端CCFL蒸気・水実験

    FUJII Yuki, DOI Taiga, HOSOKAWA SHIGEO, TOMIYAMA Akio, KAWASAKI Ikuo, MURASE Michio

    日本原子力学会2013年秋の大会, Sep. 2013, Japanese, 日本原子力学会, 八戸, Domestic conference

    Oral presentation

  • 散気管内外の流れに液相粘性が及ぼす影響に関する研究

    HAYASHI Kosuke, SAMPEI Tomoyuki, TOMIYAMA Akio, FURUNO Shinsuke, KIRA Fumihiro

    混相流シンポジウム2013, Aug. 2013, Japanese, 日本混相流学会, 長野, Domestic conference

    Oral presentation

  • 気泡塔内ボイド率・液相速度分布の計測と数値予測

    OJIMA Shinpei, MIKIHARA Ikumi, HOSOKAWA SHIGEO, TOMIYAMA Akio

    混相流シンポジウム2013, Aug. 2013, Japanese, 日本混相流学会, 長野, Domestic conference

    Oral presentation

  • 加圧溶解法により生成した微細気泡の経時変化

    FUJIMOTO Shudai, ISHI Kazuya, HOSOKAWA SHIGEO, TOMIYAMA Akio, ITO Yoshihiro, MAEDA Yasunari

    混相流シンポジウム2013, Aug. 2013, Japanese, 日本混相流学会, 長野, Domestic conference

    Oral presentation

  • 鉛直円管内CO2気泡周りの濃度分布計測

    HOSODA Shogo, AOKI Jiro, HAYASHI Kosuke, HOSOKAWA Shigeo, TOMIYAMA Akio

    混相流シンポジウム2013, Aug. 2013, Japanese, 日本混相流学会, 長野, Domestic conference

    Oral presentation

  • 分子タグ法と空間フィルタ流速計の融合による気泡流の速度計測

    HOSOKAWA SHIGEO, IKEDA Satoshi, TOMIYAMA AKIO

    第62回理論応用力学講演会, Mar. 2013, Japanese, 日本学術会議, 東京, Domestic conference

    Oral presentation

  • 粘性力及び表面張力の評価法が界面運動の数値予測に及ぼす影響

    HAYASHI KOSUKE, TOMIYAMA AKIO

    第62回理論応用力学講演会, Mar. 2013, Japanese, 東京工業大学, Domestic conference

    Oral presentation

  • 空間フィルタ流速計による液滴速度の測定

    KITAHATA KYOSUKE, MATSUMOTO TAKAAKI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会 関西支部第88期定時総会講演会, Mar. 2013, Japanese, 日本機械学会関西支部, 大阪, Domestic conference

    Oral presentation

  • リフラックス冷却における蒸気発生器U字管での熱流体挙動(2) 鉛直管下端における気液対向流制限に関する研究

    FUJII YUKI, DOI TAIGA, HOSOKAWA SHIGEO, TOMIYAMA AKIO, KAWASAKI IKUO, MURASE MICHIO

    日本原子力学会2013年春の大会, Mar. 2013, Japanese, 日本原子力学会, 大阪, Domestic conference

    Oral presentation

  • V字管内のスラッギング現象に関する研究

    IRIKURA MOTOKI, MAEKAWA MUNENORI, HOSOKAWA SHIGEO, TOMIYAMA AKIO

    化学工学会第78年会, Mar. 2013, Japanese, 化学工学会, 大阪, Domestic conference

    Oral presentation

  • 空間フィルタ流速計による3D3C速度計測

    HOSOKAWA SHIGEO, TOMIYAMA AKIO

    日本機械学会研究分科会RC254第3回分科会, Dec. 2012, Japanese, 日本機械学会, Kobe, Domestic conference

    Oral presentation

  • Effects of Shape Oscillation and Surfactant on Mass Transfer from Wobbling and Taylor Bubbles (Invited Lecture)

    TOMIYAMA Akio

    DFG Workshop on Transport Processes at Fluidic Interface, Oct. 2012, English, Frankfurt,Germany, International conference

    [Invited]

    Invited oral presentation

  • Effects of surfactant on the lift force acting on bubbles in linear shear flows

    HAYASHI, Kosuke, MATSUNAGA, Akira, HAMADA, Takeshi, TOMIYAMA, Akio

    JSMF Annual Meeting 2012, Aug. 2012, Japanese, 日本混相流学会, Kashiwa, Domestic conference

    Oral presentation

  • Reduction of boundary slip from the immersed boundary-lattice Boltzmann method by two-relaxation-time

    SETA, Takeshi, ROJAS, Roberto, HAYASHI, Kosuke, TOMIYAMA, Akio

    JSMF Annual Meeting 2012, Aug. 2012, Japanese, 日本混相流学会, Kashiwa, Domestic conference

    Oral presentation

  • Immersed Boundary-Finite Difference Lattice Boltzmann Method Using Two Relaxation Times

    ROJAS, Roberto, SETA, Takeshi, HAYASHI, Kosuke, TOMIYAMA, Akio

    JSMF Annual Meeting 2012, Aug. 2012, Japanese, 日本混相流学会, Kashiwa, Domestic conference

    Oral presentation

  • Study on Two-Phase Swirling Flow in a Gas-Liquid Separator

    MIKA Takeshi, MATSUBAYASHI Toshiki, HOSOKAWA Shigeo, TOMIYAMA Akio

    The 17th National Symposium on Power and Energy Systems (SPES 2012), Jun. 2012, Japanese, 日本機械学会動力・エネルギー部門, Fukuoka, Domestic conference

    Oral presentation

  • Turbulent liquid flow in a rod bundle

    KOGA Syunichi, YAMAMOTO Taishi, HOSOKAWA Shigeo, TOMIYAMA Akio

    The 17th National Symposium on Power and Energy Systems (SPES 2012), Jun. 2012, Japanese, 日本機械学会動力・エネルギー部門, Fukuoka, Domestic conference

    Oral presentation

  • Study on bubbly flow in a four by four rod bundle

    HOSOKAWA Shigeo, MURAMATSU Yuya, TADA Ryo, HAYASHI Kosuke, TOMIYAMA Akio

    The 17th National Symposium on Power and Energy Systems (SPES 2012), Jun. 2012, Japanese, 日本機械学会動力・エネルギー部門, Fukuoka, Domestic conference

    Oral presentation

  • 小型挿入型光ファイバLDVの開発

    UCHIDA Takuma, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部第87期定時総会講演会, Mar. 2012, Japanese, 日本機械学会, Osaka, Domestic conference

    Oral presentation

  • 分子タグ法と空間フィルタ流速計による速度場の詳細測定

    HOSOKAWA Shigeo, TOMIYAMA Akio

    JAXA第7回学際領域における分子イメージングフォーラム, Nov. 2011, Japanese, JAXA, Tokyo, Domestic conference

    Invited oral presentation

  • ボアスコープを用いた空間フィルタ流速計による流速測定

    HOSOKAWA Shigeo, MATSUMOTO Takaaki, TOMIYAMA Akio, TAKEMORI Toshikazu

    日本機械学会熱工学コンファレンス2011, Oct. 2011, Japanese, 日本機械学会, Hamamatsu, Domestic conference

    Oral presentation

  • 鉛直矩形ダクト内気泡乱流における乱れエネルギ収支

    HOSOKAWA Shigeo, MIZUMOTO Hiroki, TOMIYAMA Akio

    日本流体力学会年会2011, Sep. 2011, Japanese, 日本流体力学会, Tokyo, Domestic conference

    Oral presentation

  • Basic study of flow inside a diffuser for membrane bioreactor

    KIRA Fumihiro, KAWAGISHI Tomiki, FURUNO Shinsuke, SAMPEI Tomoyuki, HAYASHI Kosuke, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • Dissolution process of a high Schmidt and low Reynolds numbers

    HOSODA Shogo, HAYASHI Kosuke, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • 空間フィルタ流速計による気泡速度の測定

    HOSOKAWA Shigeo, SATO Hiroyasu, MATSUMOTO Takaaki, HAYASHI Kosuke, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 日本混相流学会, Kyoto, Domestic conference

    Oral presentation

  • Interface tracking simulation of bubbles with adsorption and desorption of soluble surfactant

    HAYASHI Kosuke, KURIMOTO Ryo, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 日本混相流学会, 京都, Domestic conference

    Oral presentation

  • 加圧溶解法で生成したマイクロバブルの気泡径分布

    MAEDA Yasunari, TAYA Chihiro, HOSOKAWA Shigeo, TOMIYAMA Akio, ITO Yoshihiro, SHIBATA Naoki

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 日本混相流学会, Kyoto, Domestic conference

    Oral presentation

  • Effects of particle size and concentration on bubble coalescence in slurry bubble column

    OJIMA Shinpei, OBATA Satoshi, HAYASHI Kosuke, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • Countercurrent flow limitation at the upper end of PWR pressurizer surge line

    YANAGI Chihiro, FUTATSUGI Takashi, HAYASHI Kosuke, TOMIYAMA Akio, KINOSHITA Ikuo, MURASE Michio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • Countercurrent gas-liquid flow in a PWR hot leg (2) (VOF calculations for 1/15-scale tests)

    MURASE Michio, KINOSHITA Ikuo, YANAGI Chihiro, UTANOHARA Yoichi, TAKATA Takashi, YAMAGUCHI Akira, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • Countercurrent gas-liquid flow in a PWR hot leg (2) (VOF calculations for full-scale conditions)

    UTANOHARA Yoichi, MURASE Michio, KINOSHITA Ikuo, YANAGI Chihiro, TAKATA Takashi, YAMAGUCHI Akira, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • Countercurrent gas-liquid flow in a PWR hot leg (1)

    KINOSHITA Ikuo, MURASE Michio, UTANOHARA Yoichi, LUCAS Dirk, VALLE Christophe, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 京都, Domestic conference

    Oral presentation

  • 4x4ロッドバンドル内気液二相気泡流に関する研究

    MURAMATSU Yuya, HOSOKAWA Shigeo, HAYASHI Kosuke, TOMIYAMA Akio

    JSMF Annual Meeting 2011, Aug. 2011, Japanese, 日本混相流学会, Kyoto, Domestic conference

    Oral presentation

  • 2×2ロッドバンドル内乱流の速度分布

    YAMAMOTO Taishi, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会動力エネルギーシンポジウム, Jun. 2011, Japanese, 日本機械学会, Suita, Domestic conference

    Oral presentation

  • 乱流における速度の詳細計測

    HOSOKAWA Shigeo, TOMIYAMA Akio

    日本混相流学会混相流フォーラム関西・混相流の産業利用研究分科会講演会, Jun. 2011, Japanese, 日本混相流学会, Osaka, Domestic conference

    Invited oral presentation

  • 界面追跡法に基づく気液間物質輸送の数値計算

    SAKATA, Ryosuke, HOSODA, Shogo, HAYASHI, Kosuke, TOMIYAMA, Akio

    日本機械学会関西支部 第86期定時総会講演会, Mar. 2011, Japanese, 日本機械学会関西支部, 京都, Domestic conference

    Oral presentation

  • Advances in Interface Tracking Method for Hear and Mass Transfers

    HAYASHI Kosuke, TOMIYAMA Akio, ZUN Iztok

    14th Organized Multiphase Flow Forum 2010, Nov. 2010, Japanese, The Japan Society for Multiphase Flow, Sapporo, Hokkaido, Domestic conference

    [Invited]

    Invited oral presentation

  • 分子タグ法の混相流への適用

    HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会第88期流体工学部門講演会, Oct. 2010, Japanese, 日本機械学会, Yonezawa, Domestic conference

    Invited oral presentation

  • 時系列デジタル画像を用いた空間フィルタ流速計

    SAKAMOTO Hiroki, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会年次大会講演会, Sep. 2010, Japanese, 日本機械学会, Nagoya, Domestic conference

    Oral presentation

  • 鉛直ダクト内気泡流における乱れエネルギ収支

    HOSOKAWA Shigeo, SUZUKI Takashi, TOMIYAMA Akio

    日本流体力学会年会2010, Sep. 2010, Japanese, 日本流体力学会, Sapporo, Domestic conference

    Oral presentation

  • リフラックス冷却時におけるホットレグでの気液対向流挙動:VOF法によるCCFL特性への流体物性値の影響評価

    KINOSHITA Ikuo, MURASE Michio, NARIAI Toshifumi, TOMIYAMA Akio

    日本原子力学会 2010秋の大会, Sep. 2010, Japanese, 札幌, Domestic conference

    Oral presentation

  • フォトブリーチング分子タグ法による気泡乱流の計測

    HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会年次大会講演会, Sep. 2010, Japanese, 日本機械学会, Nagoya, Domestic conference

    Invited oral presentation

  • Numerical simulation of bubbly flow in slurry using multi-fluid model

    OBATA, Satoshi, HAYASHI, Kosuke, TOMIYAMA, Akio

    JSMF Annual Meeting 2010, Jul. 2010, Japanese, Hamamatsu, Domestic conference

    Oral presentation

  • 加圧溶解法より発生した微細気泡の気泡径・数密度に関する研究

    TAYA Chihiro, HOSOKAWA Shigeo, TOMIYAMA Akio, MAEDA Yasunari, YAMAGUCHI Shigeyuki, ITO Yoshihiro

    JSMF Annual Meeting 2010, Jul. 2010, Japanese, 日本混相流学会, Hamamatsu, Domestic conference

    Oral presentation

  • Study on Counter-Current Flows in Scale Down Model of a PWR Surge Line

    FUTATSUGI, Takashi, NARIAI Toshifumi, TOMIYAMA Akio, KINOSHITA Ikuo, MURASE Michio

    JSMF Annual Meeting 2011, Jul. 2010, Japanese, 日本混相流学会, 浜松, Domestic conference

    Oral presentation

  • A correlation of terminal velocity for Taylor drops in vertical pipes

    KURIMOTO, Ryo, HAYASHI, Kosuke, TOMIYAMA, Akio

    JSMF Annual Meeting 2010, Jul. 2010, Japanese, Hamamatsu, Domestic conference

    Oral presentation

  • Countercurrent Gas Liquid Flow in a Rectangular Channel Simulating a PWR Hot Leg(2)

    MURASE Michio, KINOSHITA Ikuo, MINAMI Noritoshi, NARIAI Toshifumi, FUTATSUGI Takashi, TOMIYAMA Akio

    JSMF Annual Meeting 2010, Jul. 2010, Japanese, 日本混相流学会, 浜松, Domestic conference

    Oral presentation

  • Countercurrent Gas Liquid Flow in a Rectangular Channel Simulating a PWR Hot Leg(1)

    KINOSHITA Ikuo, MURASE Michio, UTANOHARA Yoichi, TOMIYAMA Akio

    JSMF Annual Meeting 2010, Jul. 2010, Japanese, 日本混相流学会, 浜松, Domestic conference

    Oral presentation

  • 気泡誘起擬似乱れに関する研究

    KATO Hirotoshi, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部第85期定時総会講演会, Mar. 2010, Japanese, 日本機械学会, Kobe, Domestic conference

    Oral presentation

  • リフラックス冷却時におけるホットレグでの気液対向流挙動 (11)FZD での蒸気・水実験に対する数値計算

    木下 郁男, 村瀬 道雄, 歌野原 陽一, LUCAS Dirk, VALLEE Christophe, 冨山 明男

    日本原子力学会2010春の大会, Mar. 2010, Japanese, 水戸, Domestic conference

    Oral presentation

  • リフラックス冷却時におけるホットレグでの気液対向流挙動 (10)FZD での空気・水実験に対する数値計算

    村瀬 道雄, 木下 郁男, 歌野原 陽一, LUCAS Dirk, VALLEE Christophe, 冨山 明男

    日本原子力学会2010春の大会, Mar. 2010, Japanese, 水戸, Domestic conference

    Oral presentation

  • PWR加圧器サージ管における気液対向流に関する研究

    成相 俊文, 冨山 明男, 南 則敏, 村瀬 道雄

    日本原子力学会2010春の大会, Mar. 2010, Japanese, 水戸, Domestic conference

    Oral presentation

  • Large Eddy Simulation of Cavitating Turbulent Flow in a Nozzle

    GOSHIMA Daisuke, SOU Akira, HAYASHI Kosuke, TOMIYAMA Akio

    18th Symposium on Atomization (ILASS-Japan), Dec. 2009, Japanese, 日本液体微粒化学会, Kyushu University, Domestic conference

    Oral presentation

  • 気液二相気泡流における乱流特性

    HOSOKAWA Shigeo, TOMIYAMA Akio, HOSOKAWA Shigeo

    Organized Multiphase Flow Forum 2009, Nov. 2009, Japanese, 日本混相流学会, Nagoya, Domestic conference

    Invited oral presentation

  • 鉛直ダクト内乱流の乱れエネルギ収支に及ぼす気泡の影響

    SUZUKI Takashi, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSME Fluids Engineering Conference 2009, Nov. 2009, Japanese, 日本機械学会, Nagoya, Domestic conference

    Oral presentation

  • フォトブリーチング分子タグ法による気泡乱流の計測

    HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部流体工学懇話会, Nov. 2009, Japanese, 日本機械学会, Kobe, Domestic conference

    Oral presentation

  • 気泡流の光学計測

    HOSOKAWA Shigeo, TOMIYAMA Akio

    化学工学会第41回秋季大会, Sep. 2009, Japanese, 化学工学会, Hiroshima University, Domestic conference

    Invited oral presentation

  • リフラックス冷却時におけるホットレグでの気液対向流挙 (9)実機条件に対する数値計算

    村瀬 道雄, 木下 郁男, 歌野原 陽一, 南 則敏, 成相 俊文, 冨山 明男

    日本原子力学会2009秋の大会, Sep. 2009, Japanese, 仙台, Domestic conference

    Oral presentation

  • リフラックス冷却時におけるホットレグでの気液対向流挙 (8)矩形流路実験に対するVOF 計算

    村瀬 道雄, 歌野原 陽一, 木下 郁男, 南 則敏, 冨山 明男

    日本原子力学会2009秋の大会, Sep. 2009, Japanese, 仙台, Domestic conference

    Oral presentation

  • Pressure Drops in Rod Bundle with Partial Length Rods

    OHTA Motoki, HAYASHI Kosuke, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2009, Aug. 2009, Japanese, 日本混相流学会, Kumamoto, Domestic conference

    Oral presentation

  • Heat Transfer Enhancement by Air Bubble Rising through Thermally Stratified Layer

    HAYASHI Kosuke, PERPAR Matjaz, ZUN Iztok, TOMIYAMA Akio

    JSMF Annual Meeting 2009, Aug. 2009, Japanese, 日本混相流学会, Kumamoto, Domestic conference

    Oral presentation

  • 気水分離器内旋回気液二相流の圧力損失評価

    片岡 宏庸, 新海 勇介, 冨山 明男

    日本混相流学会年会講演会, Aug. 2009, Japanese, 熊本, Domestic conference

    Oral presentation

  • 加圧溶解型微細気泡生成法における液相流束および溶存気体量が気泡径・数密度に及ぼす影響

    HOSOKAWA Shigeo, TANAKA Kenzo, TOMIYAMA Akio, MAEDA Yasunari, YAMAGUCHI Shigeyuki, ITO Yoshihiro

    JSMF Annual Meeting 2009, Aug. 2009, Japanese, 日本混相流学会, Kumamoto, Domestic conference

    Oral presentation

  • Terminal velocities of single large drops rising through a vertical pipe

    YOSHIKAWA Yasuki, KURIMOTO Ryo, HAYASHI Kosuke, TOMIYAMA Akio

    JSMF Annual Meeting 2009, Aug. 2009, Japanese, 日本混相流学会, Kumamoto, Domestic conference

    Oral presentation

  • Cavitating Flow in a Nozzle of a Pressure Atomizer

    GOSHIMA Daisuke, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2009, Aug. 2009, Japanese, 日本混相流学会, Kumamoto, Domestic conference

    Oral presentation

  • スワラー形状が気水分離器内旋回二相流に及ぼす影響

    新海 勇介, 片岡 宏庸, 冨山 明男

    日本混相流学会年会講演会2009, Aug. 2009, Japanese, 熊本, Domestic conference

    Oral presentation

  • PWRホットレグでの気液対向流 ((3)数値計算とCCFL特性の比較)

    南 則敏, 村瀬 道雄, 歌野原 陽一, 西脇 大祐, 冨山 明男

    日本混相流学会年会講演会2009, Aug. 2009, Japanese, 熊本, Domestic conference

    Oral presentation

  • PWRホットレグでの気液対向流 ((2)数値計算と水位分布の比較)

    村瀬 道雄, 南 則敏, 歌野原 陽一, 成相 俊文, 西脇 大祐, 冨山 明男

    日本混相流学会年会講演会2009, Aug. 2009, Japanese, 熊本, Domestic conference

    Oral presentation

  • PWRホットレグでの気液対向流 ((1)水位分布の測定)

    成相 俊文, 冨山 明男, 村瀬 道雄

    日本混相流学会年会講演会2009, Aug. 2009, Japanese, 熊本, Domestic conference

    Oral presentation

  • フォトブリーチング分子タグ法による速度と速度勾配の同時測定

    HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会RC237「先端的熱流体計測法に関する研究分科会」, May 2009, Japanese, 日本機械学会, Nagoya University, Domestic conference

    Oral presentation

  • 一様せん断流中単一液滴に作用する力に関する研究

    HIGASHINO Hiroyuki, ISHII Daiki, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部第84期定時総会講演会, Mar. 2009, Japanese, 日本機械学会, Osaka, Domestic conference

    Oral presentation

  • ダクト内気泡乱流場の乱れエネルギー収支

    FUKUNAGA Takayuki, SUZUKI Takashi, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部第84期定時総会講演会, Mar. 2009, Japanese, 日本機械学会, Osaka, Domestic conference

    Oral presentation

  • Effect of Nozzle Length on Cavitation in a Nozzle and a Liquid Jet

    ISOZAKI Kenji, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    17th Symposium on Atomization, Dec. 2008, Japanese, 日本液体微粒化学会, Yokohama, Domestic conference

    Oral presentation

  • 気泡乱流場における乱れエネルギー収支の計測

    HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部秋季技術交流フォーラム, Oct. 2008, Japanese, 日本機械学会, Kyoto, Domestic conference

    Oral presentation

  • PWRホットレグを模擬した矩形流路での気液対向流(流動状態の数値解析)

    MINAMI Noritoshi, MURASE Michio, UTANOHARA Yoichi, TOMIYAMA Akio, HOSOKAWA Shigeo

    日本混相流学会年会講演会2008, Aug. 2008, Japanese, 日本混相流学会, Aizu, Domestic conference

    Oral presentation

  • PWRホットレグを模擬した矩形流路での気液対向流(運動量式に基づくCCFL特性の計算)

    MURASE Michio, MINAMI Noritoshi, NISHIWAKI Daisuke, TOMIYAMA Akio, HOSOKAWA Shigeo

    日本混相流学会年会講演会2008, Aug. 2008, Japanese, 日本混相流学会, Aizu, Domestic conference

    Oral presentation

  • Gas-Liquid Two-Phase Flow in a Rod Bundle with Partial Length Rods

    MIZUTANI Yoshitaka, HOSOKAWA Shigeo, SOU Akira, TOMIYAMA Akio

    日本混相流学会年会講演会2008, Aug. 2008, Japanese, 会津, Domestic conference

    Oral presentation

  • Numerical Simulation of Bubble Coalescence in Bubbly Flows

    KANG Hyungha, SOU Akira, TOMIYAMA Akio

    混相流学会年会講演会2008, Aug. 2008, Japanese, 会津, Domestic conference

    Oral presentation

  • マイクロバブルの気泡径に及ぼす混入気泡の影響

    TANAKA Kenzo, HOSOKAWA Shigeo, TOMIYAMA Akio, YAMAGUCHI Shigeyuki, MAEDA Yasunari, ITO Yoshiyasu

    日本混相流学会年会講演会2008, Aug. 2008, Japanese, 日本混相流学会, Aizu, Domestic conference

    Oral presentation

  • A Three-Dimensional PIV using Intensity Gradients of a Two-Color Laser Sheet

    SAJI Akihiro, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部 第83期定時総会講演会, Mar. 2008, Japanese, 日本機械学会, Osaka, Domestic conference

    Oral presentation

  • Dimensionless Index for Cavitation in Nozzles of Various Geometries

    Muhammad Ilham Maulana, ISOZAKI Kenji, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    第16回微粒化シンポジウム, Dec. 2007, English, Osaka, Domestic conference

    Oral presentation

  • Two-Phase Swirling Flow in a Gas-Liquid Separator

    KATAOKA Hironobu, NISHIWAKI Daisuke, TOMIYAMA Akio, HOSOKAWA Shigeo, CHAKI Masao

    JSMF Annual Meeting 2007, Jun. 2007, Japanese, 日本混相流学会, Sapporo, Domestic conference

    Oral presentation

  • Experimental Study of Counter-Current Flow in a Hot Leg of PWR

    NISHIWAKI Daisuke, KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, SASAKI Yasuhiro, MINAMI Noritoshi

    JSMF Annual Meeting 2007, Jun. 2007, Japanese, 日本混相流学会, Sapporo, Domestic conference

    Oral presentation

  • Dissolution of Single Carbon Dioxide Bubbles in a Vertical Pipe

    OKAWA Hideaki, ABE Satoru, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2007, Jun. 2007, Japanese, 日本混相流学会, Sapporo, Domestic conference

    Oral presentation

  • Measurements of Turbulent Bubbly Flow using Photobleaching Molecular Tagging Velocimetry

    HOSOKAWA Shigeo, FUKUNAGA Takayuki, KOBAYASHI Atsuki, TOMIYAMA Akio

    JSMF Annual Meeting 2006, Jun. 2007, Japanese, 日本混相流学会, Hokkaido, Domestic conference

    Oral presentation

  • Effects of nozzle shape and size on cavitation and liquid jet atomization

    SOU Akira, Muhammad Ilham Maulana, ISOZAKI Kenji, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2007, Jun. 2007, Japanese, 日本混相流学会, Sapporo, Domestic conference

    Oral presentation

  • Research on Hyper ABWR Plants of Extended Core Power Density: Experimental Study on Characteristics of Two-Phase Flow in a Steam Separator

    KATAOKA Hironobu, NISHIWAKI Daisuke, TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira, CHAKI Masao

    2007 Annual Meeting of AESJ, Mar. 2007, Japanese, 日本原子力学会, Nagoya, Domestic conference

    Oral presentation

  • Multi-Fluid Simulation of Turbulent Bubbly Pipe Flows

    HASHIMOTO Shohei, HOSOKAWA Shigeo, TOMIYAMA Akio, SOU Akira

    日本機械学会関西支部第82期定時総会講演会, Mar. 2007, Japanese, 日本機械学会, Osaka, Domestic conference

    Oral presentation

  • Measurement of Turbulent Duct Flow using a Photobleaching Molecular Tagging Method

    KOBAYASHI Atsuki, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会関西支部第82期定時総会講演会, Mar. 2007, Japanese, 日本機械学会, Osaka, Domestic conference

    Oral presentation

  • Counter-current flow in a hot leg of PWR

    NISHIWAKI Daisuke, KATAOKA Hironobu, TOMIYAMA Akio, HOSOKAWA Shigeo, SASAKI Yasuhiro, MINAMI Noritoshi

    2007 Annual Meeting of AESJ, Mar. 2007, Japanese, Nagoya, Domestic conference

    Oral presentation

  • フェーズフィールド界面追跡法による二相流数値シミュレーション

    TAKADA, Naoki, HIROKAWA, Keishun, HAYASHI, Kosuke, TOMIYAMA, Akio

    日本流体力学会第20回数値流体力学シンポジウム, CO-ROM (6 pages), Dec. 2006, Japanese, 日本流体力学会, 名古屋, Domestic conference

    Oral presentation

  • Research on Hyper ABWR Plants of Extended Core Power Density (7) Experimental Study on Characteristics of Two-Phase Flow in a Steam Separator

    KATAOKA Hironobu, NISHIWAKI Daisuke, TOMIYAMA Akio, HOSOKAWA Shigeo, SOU Akira, CHAKI Masao

    2006 Fall Meeting of AESJ, Oct. 2006, Japanese, 日本原子力学会, Hokkaido, Domestic conference

    Oral presentation

  • Mechanism of Liquid Jet Atomization by Cavitation in a Nozzle

    SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    オーガナイズド混相流フォーラム(OMF2006), Oct. 2006, Japanese, Miyagi, Domestic conference

    [Invited]

    Invited oral presentation

  • Measurement of Micro-Bubbles Generated in a Two-Dimensional Nozzle

    KOEDA Ryoichi, HOSOKAWA Shigeo, TOMIYAMA Akio, ROKUSHIMA Kazumasa, YAMAGUCHI Shigeyuki, MAEDA Yasunari

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, 日本混相流学会, Kanazawa, Domestic conference

    Oral presentation

  • Effects of Cavitation in 2D Nozzle on Liquid Jet Atomization

    MAEDA Tatsutoshi, Maulana Muhammad Ilham, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, 日本混相流学会, Kanazawa, Domestic conference

    Oral presentation

  • Research on Hyper ABWR Plants of Extended Core Power Density (4) (Experimental Study on Characteristics of Two-Phase Flow in a Small Scale Steam Separator Model)

    KATAOKA Hironobu, HOSOKAWA Shigeo, TOMIYAMA Akio, CHAKI Masao, MURASE Michio

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, 日本混相流学会, Kanazawa, Domestic conference

    Oral presentation

  • Numerical Simulation of Heterogeneous Bubbly Flow in a Bubble Column

    KINOSHITA Kouji, MAEKAWA Munenori, SHIMADA Naoki, SOU Akira, TOMIYAMA Akio

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, 日本混相流学会, Kanazawa, Domestic conference

    Oral presentation

  • Bubble Dissolution of CO2-Water Two-Phase Bubbly Flow in a Vertical Pipe

    NOZAWA Satoshi, ABE Satoru, HOSOKAWA Shigeo, SOU Akira, TOMIYAMA Akio

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, Kanazawa, Domestic conference

    Oral presentation

  • Influence of Obstacle on Bubble Motion in High Speed Flows in a Vertical Duct

    ZHENG Zhang, MAKINO Yasushi, KATAOKA Hironobu, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, 日本混相流学会, Kanazawa, Domestic conference

    Oral presentation

  • Study on Lift Force Acting on Single Drops in Linear Shear Flow

    OGAWA Kohei, Win Myint, HAYASHI Kosuke, HOSOKAWA Shigeo, TOMIYAMA Akio

    JSMF Annual Meeting 2006, Aug. 2006, Japanese, Kanazawa, Domestic conference

    Oral presentation

  • Verification of Numerical Method for a Flow with Density Distribution

    SOU Akira, MAEDA Akiyoshi, HOSOKAWA Shigeo, TOMIYAMA Akio

    34th Symposium on Visualization, Jul. 2006, Japanese, 可視化情報学会, Tokyo, Domestic conference

    Oral presentation

  • Influence of Ambient Gas Density on Unsteady Spray Injected from a Swirl Injector

    HOSOKAWA Shigeo, SOU Akira, Muhammad Ilham Maulana, TOMIYAMA Akio

    34th Symposium on Visualization, Jul. 2006, Japanese, 可視化情報学会, Tokyo, Domestic conference

    Oral presentation

  • 二相流シミュレーションの界面移流・再構成計算に対するカーン‐ヒリヤード方程式の適用性の検討

    TAKADA, Naoki, HIROKAWA, Keishun, HAYASHI, Kosuke, TOMIYAMA, Akio

    日本計算工学会第11回計算工学講演会, pp. 415-416, Jun. 2006, Japanese, 日本計算工学会, 大阪, Domestic conference

    Oral presentation

  • Diameter and Velocity Measurements of Micro Bubbles

    AKAGAWA Junichi, HOSOKAWA Shigeo, TOMIYAMA Akio, ROKUSHIMA Kazumasa, YAMAGUCHI Shigeyuki, MAEDA Yasunari

    日本機械学会流体工学部門講演会2005, Oct. 2005, Japanese, Kanazawa, Domestic conference

    Oral presentation

  • Effect of Surrounding Gas Density on Spray Characteristics of Swirl Injector

    NOMURA Ryosuke, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本機械学会流体工学部門講演会, Oct. 2005, Japanese, 金沢, Domestic conference

    Oral presentation

  • Terminal Velocities of Single Drops in Stagnant Liquids

    WIN Myint, TOMIYAMA Akio, HOSOKAWA Shigeo

    日本流体力学会年会2005, Sep. 2005, English, Tokyo, Domestic conference

    Oral presentation

  • 広範囲の燃料格子仕様に適用する汎用沸騰遷移解析手法に関する技術開発(2)-サブチャンネル内流動様式の測定-

    TSUBO Yasushi, MIZUTANI Yoshitaka, HOSOKAWA Shigeo, TOMIYAMA Akio, MISHIMA Kaichiro, KUDO Yoshiro

    日本原子力学会2005年秋の大会, Sep. 2005, Japanese, Aomori, Domestic conference

    Oral presentation

  • Effects of Turbulent Cavitation Flow in a Two-Dimensional Nozzle on Liquid Atomization

    SOU Akira, NIGORIKAWA Shinji, MAEDA Tatsutoshi, TOMIYAMA Akio, HOSOKAWA Shigeo

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • Development of a Hybrid Method for Dispersed Multi-Phase Flows

    SAKODA Kenichi, SOU Akira, TOMIYAMA Akio

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • 二相流界面追跡シミュレーションのためのフェーズフィールド法

    TAKADA Naoki, MISAWA Masaki, TOMIYAMA Akio

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • Motion of Small Bubbles in High-Speed Flows in a Vertical Duct containing an Obstacle

    ZHANG Zheng, KATAOKA Hironobu, MAKINO Yasushi, TOMIYAMA Akio, HOSOKAWA Shigeo

    日本機械学会第18回計算力学講演会, Aug. 2005, Japanese, Ibaragi, Domestic conference

    Oral presentation

  • 強制対流サブクール沸騰中における蒸気泡挙動の数値解析

    OKAWA Tomio, TOMIYAMA Akio, KATAOKA Isao, MORI Michitsugu

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • Influence of Liquid Phase Turbulence on Relative Velocity between Bubbles and Liquid

    HOSOKAWA Shigeo, HASHIMOTO Shohei, TOMIYAMA Akio

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, Tokyo, Domestic conference

    Oral presentation

  • Numerical Simulation of Heterogeneous Bubbly Flow in a Bubble Column

    MAEKAWA Munenori, KAKUZAWA Masahiro, KINOSHITA Kouji, SOU Akira, TOMIYAMA Akio

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • Gas-Liquid Two-Phase Flow Pattern in a Rod Bundle

    MIZUTANI Yoshitaka, TSUBO Yasushi, MISHIMA Kaichiro, KUDO Yoshiro, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, 東京, Domestic conference

    Oral presentation

  • Simultaneous measurement of velocity and velocity gradient using photobleaching molecular tagging velocimetry

    AKAGAWA Junichi, KOBAYASHI Atsuki, 細川 茂雄, 冨山 明男

    日本混相流学会年会講演会2005, Aug. 2005, Japanese, Tokyo, Domestic conference

    Oral presentation

  • Simultaneous measurement of velocity and velocity gradient using photobleaching molecular tagging velocimetry

    HOSOKAWA Shigeo, AKAGAWA Junichi, TOMIYAMA Akio

    第33回可視化情報シンポジウム, Jul. 2005, Japanese, Tokyo, Domestic conference

    Oral presentation

  • 表面張力評価へのカーン‐ヒリヤード方程式の応用

    HAYASHI, Kosuke, TAKADA, Naoki, TOMIYAMA, Akio

    日本機械学会第18回計算力学講演会, pp. 805-806, 2005, Japanese, 日本機械学会, 筑波, Domestic conference

    Oral presentation

  • ノズル内キャビテーション流れの可視化とLDV計測

    宋 明良, 濁川 慎司, 冨山 明男, 細川 茂雄, 松本 洋一郎

    第13回微粒化シンポジウム, Dec. 2004, Japanese, 日本液体微粒化学会, 東京, Domestic conference

    Oral presentation

  • 二酸化炭素-水系鉛直管内気泡流に関する研究

    嶋 敏秀, 白井 正貴, 冨山 明男, 細川 茂雄, 宋 明良

    日本混相流学会年会講演会, 2004, Japanese, 日本混相流学会, 岡山大学, Domestic conference

    Oral presentation

  • 集合体内二層流流動様式遷移条件評価式の開発

    三島 嘉一郎, 冨山 明男, 工藤 義朗, 白川 典幸

    日本原子力学会春の年会, 2004, Japanese, 日本原子力学会, 岡山大学, Domestic conference

    Oral presentation

  • 改良SCA法による液体粒子の界面追跡計算

    林 公祐, Win Myint, 宋 明良, 冨山 明男

    日本混相流学会年会講演会, 2004, Japanese, 日本混相流学会, 岡山大学, Domestic conference

    Oral presentation

  • 鉛直円管内気液二相気泡乱流における気泡運動に関する研究

    藤墳 哲平, 細川 茂雄, 冨山 明男

    日本混相流学会年会講演会, 2004, Japanese, 日本混相流学会, 岡山大学, Domestic conference

    Oral presentation

  • インジェクタのノズル内キャビテーションと液体噴流の可視化

    濁川 慎司, 宋 明良, 冨山 明男, 細川 茂雄, 松本 洋一郎

    日本混相流学会年会講演会, 2004, Japanese, 日本混相流学会, 岡山大学, Domestic conference

    Oral presentation

  • Terminal Velocities of Single Drops rising through Stagnant Liquids

    Win Myint, MATSUMOTO Daisuke, SOU Akira, HOSOKAWA Shigeo, TOMIYAMA Akio

    日本混相流学会年会講演会, 2004, English, 日本混相流学会, 岡山大学, International conference

    Oral presentation

  • 2波長の光強度勾配を用いた3次元粒子画像流速計の開発

    細川 茂雄, 今井 健二郎, 冨山 明男

    第32回可視化情報シンポジウム, 2004, Japanese, 可視化情報学会, 工学院大学, Domestic conference

    Oral presentation

  • 粒子画像流速測定法を用いた気泡周りの圧力評価

    今井 健二郎, 細川 茂雄, 冨山 明男

    日本混相流学会年会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 微粒化ノズル内キャビテーション流れと液体噴流の微粒化

    宋 明良, 林 公祐, 新田 真一, 冨山 明男

    日本混相流学会年会講演会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 非均質気泡プルームに関する研究

    吉田 悟, 島田 直樹, 冨山 明男, 細川 茂雄

    日本混相流学会年会講演会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 混相流数値解析における格子ボルツマン法の界面モデルに関する検討

    高田 尚樹, 冨山 明男

    日本機械学会第16回計算力学講演会, 2003, Japanese, 日本機械学会計算力学部門, 神戸大学工学部, Domestic conference

    Oral presentation

  • 気泡追跡法による気泡揺動運動予測の試み

    迫田 健一, 宋 明良, 冨山 明男

    日本混相流学会年会講演会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 簡素化界面再構築法に基づく界面追跡法

    宋 明良, 林 公祐, 冨山 明男

    日本機械学会第16回計算力学講演会, 2003, Japanese, 日本機械学会計算力学部門, 神戸大学工学部, Domestic conference

    Oral presentation

  • 界面追跡法による気液二相流数値予測の試み

    林 公祐, 宋 明良, 冨山 明男

    産学官技術フォーラム’03, 2003, Japanese, 神戸市立工業高等専門学校, 神戸商工会議所, 神戸市産業振興センター, Domestic conference

    Poster presentation

  • 鉛直流路内気泡の上昇速度に関する研究

    三橋 真人, 冨山 明男, 細川 茂男, 宋 明良

    日本混相流学会年会講演会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 鉛直管内未発達気泡流に関する研究

    白井 正貴, 山本 修示, 冨山 明男, 細川 茂雄

    日本混相流学会年会講演会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 鉛直円管内気泡流における壁面近傍の乱流特性

    細川 茂雄, 植田 浩生, 冨山 明男

    日本機械学会年次大会講演会, 2003, Japanese, 日本機械学会, 徳島大学, Domestic conference

    Oral presentation

  • 鉛直円管内気泡流における気泡誘起乱れに関する研究

    細川 茂雄, 植田 浩生, 藤墳 哲平, 冨山 明男

    日本混相流学会年会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • 液滴・噴霧燃焼の数値シミュレーション

    宋 明良, 林 公祐, 國本 雅也, 冨山 明男

    日本混相流学会年会講演会, 2003, Japanese, 日本混相流学会, 大阪大学, Domestic conference

    Oral presentation

  • カセグレン光学系による層流拡散火炎基部の自発光計測

    橋本 英樹, 斎藤 潤一, 宋 明良, 冨山 明男

    第41回燃焼シンポジウム, 2003, Japanese, 日本燃焼学会, つくば市, Domestic conference

    Oral presentation

  • Photobleaching反応を用いた気泡周りの流れの計測

    青木 隆介, 細川 茂雄, 冨山 明男

    日本機械学会年次大会講演会, 2003, Japanese, 日本機械学会, 徳島大学, Domestic conference

    Oral presentation

  • 粒子追跡法による鉛直管内気泡流の数値解析

    冨山明男, SOU AKIRA, 坂口忠司

    混相流シンポジウム'95, Jul. 1995, Japanese, 松山, Domestic conference

    Oral presentation

  • 気泡が壁面熱伝達に及ぼす影響に関する数値計算

    冨山明男, 大島恭史, SOU AKIRA, 坂口忠司

    混相流シンポジウム'95, Jul. 1995, Japanese, 松山, Domestic conference

    Oral presentation

  • 垂直管内気泡流のボイド分布予測

    冨山明男, SOU AKIRA, 河南暢剛, 坂口忠司

    日本機械学会九州支部北九州地方講演会, Nov. 1994, Japanese, 北九州, Domestic conference

    Oral presentation

  • 気泡の挙動に関するシミュレーション

    冨山明男, SOU AKIRA, 坂口忠司, 吉川秀雄

    日本学術会議シンポジウム「C.G.で見る流れの世界」, Jul. 1994, Japanese, 東京, Domestic conference

    Oral presentation

  • ダクト内流れ中単一気泡の運動に及ぼす各種無次元数の影響

    冨山明男, SOU AKIRA, 遠山 巧, 坂口忠司

    混相流シンポジウム'94, Jul. 1994, Japanese, 筑波, Domestic conference

    Oral presentation

  • ダクト内気泡流の三次元詳細解析

    冨山明男, SOU AKIRA, 吉川秀雄, 坂口忠司

    日本機械学会熱工学講演会, Nov. 1993, Japanese, 東京, Domestic conference

    Oral presentation

  • 静止液中管内単一大気泡の形状と上昇速度

    冨山明男, SOU AKIRA, 坂口忠司

    混相流シンポジウム'93, Jul. 1993, Japanese, 福岡, Domestic conference

    Oral presentation

  • 管内気泡流の詳細解析

    冨山明男, SOU AKIRA, 坂口忠司

    日本機械学会第70期通常総会講演会, Mar. 1993, Japanese, 八王子, Domestic conference

    Oral presentation

  • 揺動気泡の数値解析

    冨山明男, SOU AKIRA, 坂口忠司

    混相流シンポジウム'92, Jul. 1992, Japanese, 仙台, Domestic conference

    Oral presentation

  • VOF法の気泡解析に対する適用性の検討

    冨山明男, SOU AKIRA, 坂口忠司

    第29回日本伝熱シンポジウム, May 1992, Japanese, Domestic conference

    Oral presentation

  • 垂列二気泡の干渉に関するシミュレーション

    冨山明男, SOU AKIRA, 南川久人, 藪下幸久, 坂口忠司

    日本機械学会関西支部講演会1991, Mar. 1992, Japanese, Domestic conference

    Oral presentation

  • VOF法による気泡挙動の解析

    冨山明男, SOU AKIRA, 松井 幹, 坂口忠司

    日本機械学会流体工学部門講演会1991, Aug. 1991, Japanese, 岡山, Domestic conference

    Oral presentation

  • 単一気泡の形状に関する数値計算

    冨山明男, SOU AKIRA, 南川久人, 坂口忠司

    混相流シンポジウム'90, Jul. 1990, Japanese, 名古屋, Domestic conference

    Oral presentation

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  • プロセス解析プログラムならびにプロセス解析装置およびそれを用いた運転シュミレータ装置

    TOMIYAMA AKIO

    特願2008-213976, 22 Aug. 2008, 大学長, 特許5078027, 07 Sep. 2012

    Patent right