SEARCH

Search Details

SHIBAHARA Makoto
Graduate School of Maritime Sciences / Department of Maritime Sciences
Associate Professor

Researcher basic information

■ Research Areas
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Thermal engineering
  • Aerospace, marine, and maritime Engineering / Marine and maritime engineering

Research activity information

■ Award
  • Jan. 2018 Elsevier, Outstanding Reviewer Status (International Journal of Heat and Mass Transfer), Top 10th percentile of reviewers in terms of the number of reviews completed within two years for International Journal of Heat and Mass Transfer
    SHIBAHARA MAKOTO
    Official journal

  • Jan. 2018 Elsevier, Outstanding Reviewer Status (Applied Energy), Top 10th percentile of reviewers in terms of the number of reviews completed within two years for Applied Energy
    SHIBAHARA MAKOTO
    Official journal

  • Oct. 2017 Elsevier, Outstanding Reviewer Status (Applied Thermal Engineering), Top 10th percentile of reviewers in terms of the number of reviews completed within two years for Applied Thermal Engineering
    SHIBAHARA MAKOTO
    Official journal

■ Paper
  • Yogyandini Mega Kirana, Purwono Sutopo Fitri, Makoto Shibahara
    Abstract Battery Thermal Management System (BTMS) onboard electric ships are crucial for optimising battery performance and longevity. By regulating the temperature, these systems ensure that batteries operate within safe limits, thus reducing the risk of thermal runaway. The present work aimed to determine the thermal performance of immersion cooling BTMS using paraffin wax-based PCM as a coolant on a LiFePo4 Li-Ion battery pack at discharging rates of 1C, 2C, and 3C. The immersion coolant rates were set to 30%, 50%, and 90%, and the inclination angles of the simulated ship’s pitching and rolling conditions were 15° and 35°, respectively. It was found that direct immersion cooling by paraffin PCM significantly affects the lowering of the battery pack’s discharging temperature. Discharging the battery without a coolant resulted in a battery temperature of 45.38 °C, above the safe limit temperature of 40°C for LiFePo4. Meanwhile, discharging the battery pack immersed in paraffin PCM reduced the temperature by approximately 6 - 7 °C at 30% immersion, 8 - 10° C at 50% immersion, and 11 - 12° C at 90% immersion. The effect of the 35° inclination angle of the battery pack showed a slightly higher temperature distribution than the 15° one at the low immersed battery’s wall. However, the pitching and rolling conditions gave the battery pack a uniform temperature distribution.
    IOP Publishing, Mar. 2025, IOP Conference Series: Earth and Environmental Science, 1461(1) (1), 012041 - 012041
    [Refereed]
    International conference proceedings

  • Transient heat transfer of helium gas for forced convective flow through a narrow tube with different lengths
    Narihiro SUZUO, Qiusheng LIU, Makoto SHIBAHARA
    Apr. 2024, Mechanical Engineering Journal, 11(2) (2), 1 - 12
    [Refereed]
    Link to Kobe Univ. Repository (Kernel)

  • 細管内における強制流動沸騰熱伝達の数値シミュレーション
    柴原誠, 劉秋生
    Mar. 2024, 日本マリンエンジニアリング学会誌, 59(2) (2), 37 - 42, Japanese
    [Refereed][Invited]
    Symposium

  • FLOW BOILING CRITICAL HEAT FLUX IN A SMALL TUBE FOR FC-72
    Yuki Otsuki, Makoto Shibahara, Qiusheng Liu, Sutopo P. Fitri
    Corresponding, Feb. 2024, Heat Transfer Research, 55(9) (9), 1 - 16, English
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • EFFECT OF GRAPHITE POWDER ON THERMAL PROPERTIES OF LATENT HEAT STORAGE MATERIALS
    Yuuhi Hatta, Makoto Shibahara, Qiusheng Liu, Sutopo P. Fıtri
    Nov. 2023, Proc. of the World Energy Storage Conference-2023 November 05-08, 2023, USA, 1(4) (4), 1 - 4, English
    [Refereed]
    International conference proceedings

  • Effects of surface roughness and pressure on pool boiling heat transfer for a ribbon heater in water
    Qiusheng LIU, Yuan GU, Makoto SHIBAHARA
    May 2023, Proc. of the International Conference on Power Engineering-2023 (ICOPE-2023), ICOPE-2023-1031, 1 - 4, English
    International conference proceedings

  • TRANSIENT HEAT TRANSFER FOR FORCED CONVECTION OF HELIUM GAS THROUGH A NARROW TUBE WITH VARIOUS LENGTHS
    Narihiro Suzuo, Qiusheng Liu, Makoto Shibahara
    May 2023, Proc. of the 2023 30th International Conference on Nuclear Engineering (ICONE30), ICONE30-1009, 1 - 7, English
    International conference proceedings

  • K. Hata, M. Shibahara
    Systematic measurements of the swirl flow heat transfer by the helical coil-wire and the pressure drop across the helical coil-wire were made by the experimental water loop flow with exponentially increasing heat input at mass velocities G = 3928 to 13,496 kg/m2s, inlet liquid temperatures Tin=284.14 to 307.57 K and inlet pressures Pin=763.80 to 1027.85 kPa. Systematic measurements of the pressure drop across the helical coil-wire were performed without heating circular tube. The measurements were performed on the inner surface of a SUS304 circular test tube with an inner diameter of 6 mm, a heated length of 59.7 mm, and a thickness of 0.5 mm, in which a helical coil was inserted. SUS304 helical coiled wire with wire diameter dw=2.025 mm, coil diameter Dc=3.4917 mm, total length l = 370 mm, coil pitch 360° rotation pc=37.222 mm, and coil pitch ratio yc=pc/d = 6.204 was employed. The relationship between swirl velocity and pump input frequency and that between fanning friction factor and Reynolds number (Red=1.949 × 104 to 1.274 × 105) were clarified beforehand. On the other hand, the RANS (Reynolds mean Navier-Stokes simulation) equations for the k-ε turbulence model in a circular tube of 6 mm diameter and 626 mm length with helical coil inserted, considering the temperature dependence of the thermophysical properties concerned, were numerically solved for the heating of water on a heated section of 6 mm diameter and 60 mm length under the same conditions as the experiment by using the PHOENICS code. The helical coiled wire of dw =2.025 mm, Dc=3.4917 mm, l = 370 mm, pc=37.222 mm and yc=6.204 was installed at the same experimental location. The surface heat fluxes q and average surface temperatures Ts,av on a circular tube with a helical coil of yc =6.204 obtained theoretically were compared with the corresponding experimental values on the graph of q versus temperature difference between average heater inner surface temperature and liquid bulk mean temperature ΔTL [=Ts,av-TL, TL=(Tin+Tout)/2]. The numerical solutions for q and ΔTL were almost identical to the corresponding experimental values for q and ΔTL, with deviations from 0 to +20% for the ΔTL range tested here. The numerical solutions of the local surface temperature (Ts)z, the local average liquid temperature (Tf,av)z, and the local liquid pressure drop ΔPz were also compared with the corresponding experimental values of (Ts)z, (Tf,av)z, and ΔPz against heated length L or distance from the test section inlet Z, respectively. The numerical solutions of (Ts)z, (Tf,av)z and ΔPz differ from the corresponding experimental data of (Ts)z, (Tf,av)z and ΔPz within ± 5%. The thickness of the conductive sublayer δCSL [=(Δr)out/2] and non-dimensional thickness of the conductive sublayer y+CSL [=(fF/2)0.5ρlusw,cδCSL/μl] for turbulent heat transfer on a circular tube with helical coiled wire are clarified on the basis of numerical solutions in the swirl velocity usw,c ranging from 5.108 to 17.146 m/s. Correlations of Nusselt number Nud, δCSL, and y+CSL for the swirl flow heat transfer in a vertical circular tube with helical coil wire are also derived.
    May 2023, International Journal of Heat and Mass Transfer, 204
    Scientific journal

  • Makoto Shibahara, Qiusheng Liu

    A flow boiling experiment in a narrow channel was conducted using subcooled water. Moreover, the experimentally measured heat flux of the channel was applied for the heat conduction analysis of insulated gate bipolar transistors (IGBTs). The relationship between the heat flux and the temperature difference was investigated experimentally, ranging from nonboiling to boiling in the narrow tube. The boiling heat transfer in the fully nucleate boiling region was validated by comparing with the Rohsenow correlation. Moreover, the measured critical heat flux (CHF) agreed with the Hall and Mudawar correlation within ± 15%. The heat conduction analysis of an IGBT module with a heatsink was solved using the measured heat flux in the narrow channel as a boundary condition, applied from the nonboiling region to the film boiling region. The thermal resistance of the material was obtained when the heatsink with narrow channels was modeled. The numerical result indicated that the thermal resistance of the material was influenced by the heat transfer process of the cooling channel.

    Begell House, Mar. 2023, Heat Transfer Research, 54(8) (8), 1 - 16, English
    [Refereed]
    Scientific journal

  • HEAT TRANSFER FOR FORCED FLOW OF HELIUM GAS IN A SMALL DIAMETER TUBE WITH DIFFERENT HEATED LENGTH
    Yushi Honjo, Feng Xu, Qiusheng Liu, Makoto Shibahara
    Aug. 2022, Proc. of 29th International Conference on Nuclear Engineering, ICONE29-91899, 1 - 6, English
    [Refereed]
    International conference proceedings

  • Feng Xu, Qiusheng Liu, Makoto Shibahara
    Apr. 2022, International Journal of Heat and Mass Transfer, 191, 1 - 10, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Natural convection heat transfer from a vertical single cylinder with eccentric grid spacer in liquid sodium
    Koichi Hata, Makoto Shibahara
    Mar. 2022, Heat and Mass Transfer, 58, 1607 - 1636, English
    [Refereed]
    Scientific journal

  • Transient forced convective heat transfer of helium gas in a narrow tube heated by exponential time-varying heat source
    F. Xu, Q.S. Liu, M. Shibahara
    2022, Experimental Heat Transfer, 35, 591 - 610, English
    [Refereed]
    Scientific journal

  • Feng Xu, Qiusheng Liu, Makoto Shibahara
    Elsevier BV, Jun. 2021, International Journal of Heat and Mass Transfer, 171, 121117 - 121117
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Feng Xu, Qiusheng Liu, Makoto Shibahara
    The high heat load on the first wall of the helium cooled blanket is removed by tube flow of helium gas. Heat transfer augmentation is considered to be acquired by downsizing of channels. Therefore, this paper experimentally studied the influence of inner diameter on the heat transfer performance of helium gas flowing in a minichannel. The helium gas flowed in the small platinum tubes with the inner diameters of 0.8 mm and 1.8 mm, respectively. The heat generation rate of the tube was controlled by a heat input subsystem and raised with an exponential equation. The surface temperature and heat flux of the tubes were obtained under a wide range of e-folding time at different flow velocities. The heat transfer coefficients of different inner diameter tubes were compared at the same conditions. The heat transfer performance of the 0.8 mmdiameter tube was compared with a classical correlation. The experimental results showed that the heat transfer performance in the minichannel is better than a conventional large-diameter tube. The heat transfer coefficients of the 0.8 mm-diameter tube were higher than those of the 1.8 mm-diameter tube. The heat transfer process was enhanced with reducing the inner diameter of the minichannel. The heat transfer process was divided into two parts including transient and quasi-steady-state regions.
    American Society of Mechanical Engineers (ASME), 2021, International Conference on Nuclear Engineering, Proceedings, ICONE, 4, English
    International conference proceedings

  • Experimental and Numerical Investigations of Subcooled Boiling Heat Transfer in a Small-Diameter Tube
    Makoto Shibahara, Qiusheng Liu, Koichi Hata, Katsuya Fukuda
    Dec. 2020, Journal Thermal Science and Engineering Applications, 12(6) (6), 061002-1 - 061002-6, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Heat Transfer Characteristics of Latent Heat Thermal Energy Storage for Floating Concentrate Solar Power Systems
    Makoto Shibahara, Tatsuya Hinoki
    Dec. 2020, IOP Conference Series: Materials Science and Engineering (The 5th International Conference on Marine Technology), 1052, 012007 - 012007, English
    [Refereed]
    International conference proceedings

  • Experimental study on transient heat transfer for helium gas flowing in a minichannel
    Feng XU, Qiusheng LIU, Satoshi KAWAGUCHI, Makoto SHIBAHARA
    Aug. 2020, Proc. of the 2020 International Conference on Nuclear Engineering, ICONE2020-16697, 1-6., English
    [Refereed]
    International conference proceedings

  • M.Shibahara, Q.S. Liu, K.Hata, K. Fukuda
    The transient critical heat flux (CHF) of subcooled water flowing in a narrow channel was measured. A small tube with an inner diameter of 1.0 mm was heated by a direct current. The effects of the subcooling, pressure, flow velocity, and e-folding times of the heat generation rate on the transient CHF were investigated. The experimental result showed that an initial temperature overshoot appeared as the e-folding time of the heat generation rate decreased. The CHF increased with a shorter e-folding time of the heat generation rate. Finally, an empirical correlation for the transient CHF was obtained.
    2020, Experimental Heat Transfer, 33(1) (1), 64 - 80, English
    [Refereed]
    Scientific journal

  • Forced Convection Heat Transfer for Helium gas Flowing in a Narrow Channel
    Xu, F, Liu, Q.S, Kawaguchi, S, Shibahara, M
    Oct. 2019, Proc. of International Conference on Power Engineering-2019, 1247 - 1252, English
    [Refereed]
    International conference proceedings

  • Nakamura Yuji, Liu Qiusheng, Shibahara Makoto, Hata Koichi, Fukuda Katsuya
    In this research, the transient heat transfer due to exponentially increasing heat input was experimentally measured for upward water flowing in a vertical small tube. The heat generation rate was increased exponentially with a function of Qoexp (t/t), where, Qo is an initial heat generation rate, t represents time and t is e-folding time. The heat generation rate was controlled by high speed computer system. The test tube was heated with exponentially increasing heat input by direct current. The average temperature of test tube was measured by resistance thermometry using a double bridge circuit. The experimental apparatus consists of a test section, a cooler, a heater, a pump, a tank and a pressurizer. The working fluid was distilled and deionized water. The inlet fluid temperature of test tube was controlled by the cooler and the heater. The system pressure was up to 800 kPa. The test tube was 0.7 mm in inner diameter and 12.0 mm in heated length respectively. The ratio of heated length to inner diameter was 17.1. The test tube was electrically isolated from experimental loop by Bakelite plates. The experimental data were compared with previous correlations of nucleate boiling. It was obtained that the experimented data agree well with full-developed flow boiling correlation by Rohsenow. Moreover, the transient critical heat flux (CHF) and nucleate boiling with onset of nucleate boiling (ONB) values increased with the increase in flow velocity. The transient CHFs and ONBs increased with a decrease in e-folding time at t < 1 s, and they approached steady-state value at t > 1 s. It was understood that the heat transfer is in steady-state at t > 1 s, and it is in transient state at t < 1 s.
    American Society of Mechanical Engineers (ASME), Jul. 2019, ASME 2019 Summer Heat Transfer Conference, HT2019-3699, 1 - 6, English
    [Refereed]
    International conference proceedings

  • SHIBAHARA MAKOTO, LIU QIUSHENG, HATA KOICHI, FUKUDA KATSUYA
    Numerical simulation of boiling heat transfer for subcooled water flowing in a small-diameter tube was conducted using the commercial computational fluid dynamics (CFD) code, PHOENICS ver. 2013. A small-diameter tube (d=1.0-2.0 mm) was modeled in the simulation. A uniform heat flux with an exponential function was given at the inner tube wall as the boundary conditions. The inner wall boundary condition was set to a non-slip. The inlet temperature ranged from 302 to 312 K. The flow velocities of d= 1.0 mm and d = 2.0 mm are 9.29 m/s and 2.34 m/s, respectively. The transient analysis was carried out from the non-boiling region since the heat flux increased with time in the author's experiments. The governing equations including the energy equation were discretized using the finite volume method in the PHOENICS code. The SIMPLE method was applied for the numerical simulation. For modeling boiling phenomena in the tube, the Eulerian-Eulerian two-fluid model was adopted using the interphase slip algorithm of PHOENICS code. In the experiment, a platinum tube was used as the experimental tube (d = 1.0-2.0 mm) to conduct joule heating by direct current. The distilled and deionized water was pressured by the pressurizer. The heat generation rate of the tube was controlled with the exponential function to obtain the transient heat transfer characteristics from the non-boiling region. The surface superheat increased as the heat flux increased in the experiment. The numerical simulation predicted the experimental data well. When the heat flux of the experiment was reached to the CHF point, the predicted value of heat transfer coefficient was approximately 3.5 % lower than that of the experiment.
    The American Society of Mechanical Engineers, Jul. 2019, Proc. of The 6th ASME Micro/Nanoscale Heat ＆ Mass Transfer International Conference, MNHMT2019-4163, 1 - 7, English
    [Refereed]
    International conference proceedings

  • NUMERICAL STUDY OF TRANSIENT HEAT TRANSFER FOR HELIUM GAS UNDER EXPONENTIALLY DECREASING FLOW CONDITIONS
    LIU Qiusheng, SHIBAHARA Makoto, FUKUDA Katsuya
    JSME(Japan Society of Mechnical Enginers), May 2019, Proceedings of ICONE-27, 27th International Conference on Nuclear Engineering, ICONE-27(ICONE27-1668) (ICONE27-1668), 1 - 6, English
    [Refereed]
    International conference proceedings

  • Yuji NAKAMURA, Qiusheng LIU, Makoto SHIBAHARA, Koichi HATA, Katsuya FUKUDA
    The Japan Society of Mechanical Engineers, Feb. 2019, Mechanical Engineering Journal, 6(1) (1), 1 - 11, English
    [Refereed]
    Scientific journal

  • Transient Turbulent Heat Transfer in Vertical Small Tube
    Yuji Nakamura, Qiusheng LIU, Makoto SHIBAHARA, Koichi HATA, Katsuya FUKUDA
    The Japan Institute of Marine Engineering, Nov. 2018, Journal of the Japan Institute of Marine Engineering, 53(6) (6), 137 - 144, Japanese
    [Refereed]
    Scientific journal

  • Shibahara Makoto, Fukuda Katsuya, Qiusheng Liu
    Elsevier, Nov. 2018, Applied Thermal Engineering, 144(5) (5), 342 - 348, English
    [Refereed]
    Scientific journal

  • TRANSIENT BOILING HEAT TRANSFER CHARACTERISTICS FOR SUBCOOLED WATER FLOWING IN A VERTICAL TUBE
    SHIBAHARA Makoto, LIU Qiusheng, HATA Koichi, FUKUDA katsuya
    Nov. 2018, Proc. of The 29th International Symposium on Transport Phenomena, ISTP29-008, 1 - 5, English
    [Refereed]
    International conference proceedings

  • Steady and Transient Heat Transfer for Subcooled Water Flow Boiling in Tubes Connected with Marine Engineering
    Makoto Shibahara, Qiusheng Liu, Koichi Hata, Katsuya Fukuda
    Oct. 2018, Proceedings of 8th Pan Asian Association of Maritime Engineering Societies meeting and the Advanced Maritime Engineering Conference 2018, 305 - 307, English
    [Refereed]
    International conference proceedings

  • TRANSIENT CONVECTION HEAT TRANSFER FOR HELIUM GAS UNDER EXPERIMENTALLY DECREASING FLOW CONDITIONS
    Liu Qiusheng, Shibahara Makoto, Fukuda Katsuya
    Assembly for International Heat Transfer Conferences, Aug. 2018, The 16th International Heat Transfer Conference, (IHTC16-21556) (IHTC16-21556), pp.1 - 8, English
    [Refereed]
    International conference proceedings

  • TRANSIENT HEAT TRANSFER FOR HELIUM GAS AT VARIOUS FLOW DECAY TIME CONSTANTS AND HEAT GENERATION RATES
    Liu Qiusheng, Kitano Ayumi, Fukuda Katsuya, Shibahara Makoto
    American Society of Mechnical Engineering (ASME), JSME, and CNS, Jul. 2018, The 26th International Conference on Nuclear Engineering, (ICONE26-81391) (ICONE26-81391), pp.1 - 7, English
    [Refereed]
    International conference proceedings

  • M. Shibahara, K. Fukuda, Q. S. Liu, K. Hata, S. Masuzaki
    Various incipient boiling phenomena for subcooled water flowing in a uniformly heated narrow tube were observed experimentally. The boiling signal was analyzed using the wavelet decomposition method. The boiling incipience of subcooled water in the narrow tube was recorded by a sound level meter at various flow velocities. A platinum tube was used as the experimental tube with an inner diameter of 1.0 mm. The length of the experimental tube was 23.2 mm. The tube was heated by the Joule effect using a direct current. The inlet temperature and flow velocities ranged 285–346 K and 2.5–14 m/s, respectively. The surface superheat ascended with an increase of the heat flux until the incipient boiling point was reached. The initial temperature overshoot did not appear as the outlet pressure increased. Since the existing correlations underestimated the incipient heat flux, a semi-empirical correlation of the boiling incipience was obtained based on the experimental data. The predicted value of the new correlation is in agreement with the experimental data within ±30%.
    Elsevier Ltd, Mar. 2018, Applied Thermal Engineering, 132(5) (5), 595 - 604, English
    [Refereed]
    Scientific journal

  • Shibahara Makoto, FUKUDA KATSUYA, Liu Qiusheng, Hata Koichi
    The heat transfer characteristics of forced convection for subcooled water in small tubes were clarified using the commercial computational fluid dynamic (CFD) code, PHENICS ver. 2013. The analytical model consists of a platinum tube (the heated section) and a stainless tube (the non-heated section). Since the platinum tube was heated by direct current in the authors’ previous experiments, a uniform heat flux with the exponential function was given as a boundary condition in the numerical simulation. Two inner diameters of the tubes were considered: 1.0 and 2.0 mm. The upward flow velocities ranged from 2 to 16 m/s and the inlet temperature ranged from 298 to 343 K. The numerical results showed that the difference between the surface temperature and the bulk temperature was in good agreement with the experimental data at each heat flux. The numerical model was extended to the liquid sublayer analysis for the CHF prediction and was evaluated by comparing its results with the experimental data. It was postulated that the CHF occurs when the fluid temperature near the heated wall exceeds the saturated temperature, based on Celata et al.’s superheated layer vapor replenishment (SLVR) model. The suggested prediction method was in good agreement with the experimental data and with other CHF data in literature within ±25%.
    Springer, Feb. 2018, Heat and Mass Transfer, 54(2) (2), 501 - 508, English
    [Refereed]
    Scientific journal

  • M. Shibahara, K. Fukuda, Q. S. Liu, K. Hata
    Critical heat fluxes (CHFs) for subcooled flow boiling of water in a vertical tube due to steady and exponentially heat inputs were measured. The platinum tube with an inner diameter of 2.0 mm and a length of 94.8 mm was placed vertically in the experimental water loop. The upward flow velocity was approximately 2.5 m/s and the outlet subcooling ranged from 18 to 48 K. The heat generation rate was varied exponentially to investigate the effect of e-folding time on the CHFs. As an experimental result, the CHFs increased with a decrease in the e-folding time. When the e-folding times were longer, the CHFs were almost constant, whereas the CHFs increased for shorter e-folding times. The CHFs were independent on outlet subcoolings at low flow conditions. Moreover, it was considered that the explosive-like CHF occurred when the inner surface temperature of the tube exceeded the lower limit of heterogeneous spontaneous nucleation (HSN) temperature.
    SPRINGER, Sep. 2017, HEAT AND MASS TRANSFER, 53(9) (9), 2999 - 3012, English
    [Refereed]
    Scientific journal

  • M. Shibahara, K. Fukuda, Q. S. Liu, K. Hata
    Steady and transient heat transfer coefficients for water flowing in small tubes with exponentially increasing heat inputs were measured. Platinum tubes with inner diameters of 1.0 and 2.0 mm were used as test tubes, which were mounted vertically in the experimental water loop. In the experiment, the upward flow velocity ranged from 2 to 16 m/s, and the corresponding Reynolds numbers ranged from 4.77 x 10(3) to 9.16 x 10(4) at the inlet liquid temperatures ranged from 298 to 343 K. The heat generation rate exponentially increased with the function. The period of the heat generation rate ranged from 24 ms to 17.5 s. Experimental results indicate that steady heat transfer coefficients decreased with the increase in the inner diameter of the small tube. Moreover, the ratio of bulk viscosity to near-wall viscosity of water increased with the rise in surface temperature of the vertical tube. From the experimental data, correlations of steady-state heat transfer for inner diameters of 1.0 and 2.0 mm were obtained. The heat transfer coefficient increased with decreasing the period of the heat generation rate as the flow velocity decreased. Moreover, the Nusselt number under the transient condition was affected by the Fourier number and the Reynolds number.
    SPRINGER, Mar. 2017, HEAT AND MASS TRANSFER, 53(3) (3), 787 - 797, English
    [Refereed]
    Scientific journal

  • M. Shibahara, K. Fukuda, Q. S. Liu, K. Hata
    High critical heat fluxes (CHFs) for subcooled boiling of water in a small tube were investigated experimentally. A platinum tube with an inner diameter of 1.0 mm and a length of 40.9 mm was used in the experiment. The upward flow velocity, the subcooling of water, and the outlet pressure of the experimental tube were varied to enable a parametric study of the CHFs. The flow velocity ranged from 9 to 13 m/s and the inlet subcooling ranged from 69 to 148 K. The boiling number decreased with increasing Weber number. The boiling number is also dependent on a non-dimensional parameter and the density ratio of liquid to vapor. A correlation for the high CHF of the small tube was obtained based on the experimental data. Finally, the high CHF correlation was evaluated using the CHF data obtained by other researchers. (C) 2017 Elsevier Ltd. All rights reserved.
    PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2017, INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 82, 74 - 80, English
    [Refereed]
    Scientific journal

  • Steady and transient critical heat flux for subcooled water in a mini channel
    Makoto Shibahara, Katsuya Fukuda, Qiusheng Liu, Koichi Hata
    Elsevier, Jan. 2017, International Journal of Heat and Mass Transfer, 104, 267 - 275, English
    [Refereed]
    Scientific journal

  • Qiusheng Liu, Li Wang, Akihiro Mitsuishi, Makoto Shibahara, Katsuya Fukuda
    Transient forced convection heat transfer due to exponentially increasing heat input to a heater is important as a database for the safety assessment of the transient heat transfer process in a very high temperature gas-cooled reactor (VHTR). Forced convection transient heat transfer for helium gas flowing over a cylinder in a narrow channel was experimentally studied at various periods of exponential increases in heat input. The test heater was mounted horizontally along the center part of a circular test channel with a diameter of 5 mm. The heat generation rates of the heater,, was increased with the exponential function, . By using a narrow channel, relatively high flow velocity was achieved, and experimental data at a high Reynolds number were obtained. According to the results, the surface temperature and the heat flux exponentially increased with time. It was clarified that the heat transfer coefficient approached the quasi-steady-state for a period of more than approximately 1 s, and it reached higher values for a period of less than approximately 1 s. The heat transfer coefficients present high dependence on the flow velocity of the helium gas and the heater diameter. Heat transfer correlations at the quasi-steady state and the transient state were obtained based on the experimental data.
    TAYLOR & FRANCIS INC, 2017, EXPERIMENTAL HEAT TRANSFER, 30(4) (4), 341 - 354, English
    [Refereed]
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Qiusheng Liu, Li Wang, Makoto Shibahara, Katsuya Fukuda
    Knowledge of the heat transfer phenomenon during flow decay transient condition is important for the safety assessment of very high temperature reactor (VHTR) during the loss of coolant accident. In this study, transient heat transfer from a horizontal cylinder to helium gas under exponentially decreasing flow rate condition was experimentally studied. The experiment was performed by using a forced convection heat transfer test loop. A flow control value with its control system was used to realize the flow decay condition. Helium gas was used as coolant and platinum cylinder with 1 mm in diameter was used as the test heater. A uniform heat generation rate was added to the cylinder by a power source. The cylinder temperature was maintained at an initial value under a definite initial flow rate of the helium gas. Then, the mass flow rate of the helium gas starts to decrease exponentially with different time constants ranged from 4.3 s to 15.4 s. The initial flow velocity ranged from 10 m/s to 4 m/s. The surface temperature, heat flux, and heat transfer coefficient were measured during the flow decay transient process under wide experimental conditions such as initial flow rate, flow decay time constant. It was found that the temperature of the test heater shows rapid increase during this process, the increasing rate of the temperature is higher for a shorter time constant. The heat transfer coefficient versus time during the flow rate decreasing process was also obtained. The transient heat transfer process during exponentially decreasing flow rate condition was clarified based on the experimental data.
    American Society of Mechanical Engineers (ASME), 2017, International Conference on Nuclear Engineering, Proceedings, ICONE, 6(Paper No. 66469) (Paper No. 66469), pp.1 - 6, English
    [Refereed]
    International conference proceedings

  • Makoto Shibahara, Katsuya Fukuda, Qiusheng Liu, Koichi Hata
    Critical heat flux (CHF) of convective boiling in a minitube due to power transient was measured. A platinum tube with an inner diameter of 1.0 mm was heated exponentially by a direct current power supply as Joule heating. The heated length of the platinum tube was 40.9 mm. The platinum tube was mounted vertically in the water-loop apparatus which consisted of a circulating pump, a pre-heater, a flow mater, a pressurizer, a cooler and a test section. The deionized water was pressurized by the pressurizer up to approximately 800 kPa to measure CHFs at the high subcooling. The upward flow velocity in the platinum tube was ranged from 5 to 11 m/s. The inlet subcooling was ranged from 92 to 117 K. The heat generation rate was controlled with exponential functions. The e-folding time of the heat generation rate was ranged from 30 ms to 18 s. As an experimental result, it was found that the CHFs increased with increasing the flow velocity and the inlet subcooling. The CHF also increased with decreasing the efolding time of the heat generation rate. Since the heat generation rate of the platinum tube increased rapidly under the power transient condition, it was considered that the heat flux of the platinum tube increased until the vapor blanket covered the heated surface of the platinum tube.
    American Society of Mechanical Engineers, 2017, ASME 2017 Heat Transfer Summer Conference, HT 2017, 2, 1 - 6, English
    [Refereed]
    International conference proceedings

  • M. Shibahara, K. Fukuda, Q. S. Liu, K. Hata
    Transient forced-convection heat transfer coefficients were measured for water flowing in a circular minichannel with exponentially increasing heat input. A stainless steel tube (SUS 304) with an inner diameter of 1.0 mm and a length of 47.4 mm, mounted vertically in the experimental water loop, was used as the experimental tube. In the experiment, the upward flow velocity ranged from 10 to 16 m/s and the inlet temperature ranged from 301 to 319 K. The heat generation rate increased exponentially. The e-folding time ranged from 39 ms to 15 s. The experimental results indicated that the turbulent heat transfer coefficients of the minichannel increased with decreasing e-folding time and increasing flow velocity. When the e-folding time was shorter than approximately 0.1 s, the heat transfer coefficients were significantly higher. Correlations of the steady and transient heat transfer for water flowing in a stainless steel tube were obtained from experimental data.
    BEGELL HOUSE INC, 2017, HEAT TRANSFER RESEARCH, 48(13) (13), 1179 - 1193, English
    [Refereed]
    Scientific journal

  • Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Transient and steady state natural convection heat transfer for D-mannitol on a horizontal cylinder was investigated experimentally at various liquid temperatures and heat input conditions. To clarify the natural convection phenomena of D-mannitol, transient and steady heat transfer coefficients were measured under various liquid temperatures of D-mannitol and periods of heat generation rates from a horizontal platinum cylinder. The platinum cylinder with a diameter of 1 mm and a length of 43.5 mm was used as the test heater in this experiment. Experimental results indicated that the steady heat transfer coefficient of D-mannitol was affected by the liquid temperature. As the liquid temperature increased, it was understood that the effect of liquid temperature weakened. When the period of the heat generation rate was changed, the heat transfer process was divided into natural convection heat transfer and conductive heat transfer. It was considered that the conductive heat transfer was more dominant as the period of the heat generation rate decreased. The empirical correlations of steady and transient heat transfer coefficients for D-mannitol were obtained. (C) 2016 Elsevier Ltd. All rights reserved.
    PERGAMON-ELSEVIER SCIENCE LTD, Dec. 2016, RENEWABLE ENERGY, 99, 971 - 977, English
    [Refereed]
    Scientific journal

  • Yantao Li, Katsuya Fukuda, Qiusheng Liu, Makoto Shibahara
    The heat transfer process of turbulent, single-phase forced convection of FC-72 through small diameter tubes with 1 and 1.8 mm inner diameters was experimentally investigated. The influence of Reynolds number (Red), Prandtl number (Pr), viscosity ratio (mu/mu(w)) and ratios of heated length to inner diameter (Lid) on turbulent heat transfer was studied in detail. The experimental data were also compared with the values calculated by classical correlations for conventional sized channels. The results indicated that the classical heat transfer correlations are not adequate for calculation of the heat transfer coefficient in small diameter tubes. The Nusselt numbers (Nu(d)) for 1 and 1.8 mm depend on Red in a different manner compared to classical correlations. The deviation from classical heat transfer correlations increased as the Red increase. The turbulent heat transfer correlation for FC-72 flow in tubes with diameters of 1 and 1.8 mm has been developed based on the experiment data. The differences between experimental and predicted Nud are within 15%. (C) 2016 Elsevier Ltd. All rights reserved.
    PERGAMON-ELSEVIER SCIENCE LTD, Dec. 2016, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 103, 428 - 434, English
    [Refereed]
    Scientific journal

  • LIU Qiusheng, ENDO Hirohiko, FUKUDA Katsuya, SHIBAHARA Makoto, ZHANG Peng

    Solution and diffusion process of carbon dioxide (CO2) in seawater is important in the research and development of CO2 ocean sequestration technology to mitigate global warming. In this study, solution and diffusion process of single CO2 bubble in seawater and pure water were experimentally studied under various pressures and temperatures to evaluate the transport process of CO2 in seawater. The solution process was conducted in a test vessel. CO2 bubble was generated by a CO2 bubble generator installed at the bottom of the vessel. The diameter of CO2 bubble was recorded using a high speed video camera. The pressure and temperature of liquids were measured by using a pressure transducer and thermocouples. Experimental conditions for the temperature ranged from 277 K to 297 K, and the pressure ranged from around 101 kPa up to 400 kPa. It was obtained that the complete solution time decreases with the increase in pressure due to its higher solubility at a higher pressure. It decreases with an increase in temperature arising from a higher diffusivity at a high temperature. It was clarified that the complete solution time for CO2 in seawater is longer than that in pure water due to its relatively lower solubility compared with pure water.

    The Japan Society of Mechanical Engineers, Oct. 2016, Mechanical Engineering Journal, 3(5) (5), 1 - 9, English
    [Refereed]
    Scientific journal

  • Convective Boiling Heat Transfer Characteristics for Pressurized Water in a Small Tube
    SHIBAHARA MAKOTO, Katsuya Fukuda, Qiusheng Liu, Koichi Hata
    Oct. 2016, Proceedings of 7th Pan Asian Association of Maritime Engineering Societies and Advanced Maritime Engineering Conference 2016, (AMEC2016-2B3-074) (AMEC2016-2B3-074), 1 - 6, English
    International conference proceedings

  • Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Melting process and heat transfer characteristics of d-mannitol were investigated experimentally and numerically to construct a fundamental database of the waste heat recovery systems for ships. d-Mannitol which has relatively high latent heat was selected in this study as a phase-change material for medium thermal energy storage. Experimental results indicate that the melting temperature and latent heat of d-mannitol were affected by the heating rate. The weight of d-mannitol did not decrease with the increase in temperature between 436 and 455 K. Moreover, numerical simulation was conducted using the commercial CFD code, ANSYS FLUENT. On the basis of the numerical simulation, melting process was affected by natural convection at the inner wall. As the heat flux of the cartridge heater input came from the inner wall, the liquid fraction increased from the inner wall to the outer wall through natural convection. The numerical result was compared with the experimental data. The temperature of the numerical simulation was approximately consistent with the experimental data. Moreover, the local heat transfer coefficients at the heater surface were calculated by the result of the numerical simulation. The heat transfer coefficients decreased during the phase change. It was considered that the heat transfer process changed from conductive heat transfer of solid state to natural convection heat transfer of liquid state as the liquid fraction increased with time.
    SPRINGER, Sep. 2016, HEAT AND MASS TRANSFER, 52(9) (9), 1993 - 2004, English
    [Refereed]
    Scientific journal

  • FLOW BOILING AND CRITICAL HEAT FLUX FOR SUBCOOLED WATER IN VERTICAL TUBE DUE TO EXPONENTIALLY INCREASING HEAT INPUTS
    SHIBAHARA MAKOTO, FUKUDA KATSUYA, LIU Qiusheng, Hata Koichi, Watanabe Sho, Nakamura Yuji, Muroga Takeo
    Sep. 2016, Proc. of The 27th International Symposium on Transport Phenomena (ISTP27), (101) (101), 1 - 5, English
    [Refereed]
    International conference proceedings

  • TRANSIENT CONVECTIVE HEAT TRANSFER FOR HELIUM GAS AT VARIOUS FLOW DECAY TIMES
    LIU Qiusheng, Zhang Yu, Wang Li, Shibahara Makoto, Fukuda Katsuya
    Tsinghua University, Aug. 2016, 9th International Symposium on Heat Transfer (ISHT9), (Paper No. ISHT9-R0226) (Paper No. ISHT9-R0226), 1 - 6, English
    [Refereed]
    International conference proceedings

  • Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    The transient forced convection heat transfer of plate heater for nitrogen gas due to exponentially increasing heat input was investigated experimentally and numerically. The platinum ribbon with a thickness of 0.1 mm and a width of 4.0 mm was used as the test heater. The heat generation rate of the test heater was raised with exponential function. The inlet flow velocity was ranged from 2 to 4 m/s for the gas temperature of 313 K under the system pressure of 500 kPa. The period of heat generation rate was ranged from 45 ms to 8 s. Experimental results indicate that the surface temperature difference and heat flux increased exponentially as the heat generation rate increased through an exponential function. It was clarified that the heat transfer coefficient was divided into the two regions for the period ranging from 45 ms to 8 s. The numerical results were compared with experimental data. The numerical simulation was in agreement with the experimental data. (C) 2015 Elsevier Ltd. All rights reserved.
    PERGAMON-ELSEVIER SCIENCE LTD, Apr. 2016, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 95, 405 - 415, English
    [Refereed]
    Scientific journal

  • TRANSIENT FORCED CONVECTION HEAT TRANSFER FROM A HORIZONTAL CYLINDER TO HELIUM GAS IN A NARROW CHANNEL
    LIU Qiusheng, MITSUISHI Akihiro, WANG Li, SHIBAHARA Makoto, FUKUDA Katsuya
    The Japan Society of Mechanical Engineers, Mar. 2016, Proceedings of the First Pacific Rim Thermal Engineering Conference, PRTEC-14654, 1 - 5, English
    [Refereed]
    International conference proceedings

  • THERMAL-HYDRAULIC ANALYSIS FOR PRISMATIC VERY HIGH TEMPERATURE REACTOR
    Wang Li, LIU Qiusheng, Shibahara Makoto, Fukuda Katsuya
    The Japan Society of Mechanical Engineers, Mar. 2016, Proceedings of the First Pacific Rim Thermal Engineering Conference, PRTEC-14472, 1 - 4, English
    [Refereed]
    International conference proceedings

  • Experimental and Numerical Investigation of Melting Process in PCM Storage
    Makoto Shibahara
    Thermal energy storage (TES) technologies have been developed using Phase Change Materials (PCM) at various power plants to utilize waste heat sources. The melting process of PCM has been investigated experimentally and numerically to construct a fundamental database of TES systems. D-Mannitol was selected as a PCM for medium TES systems in this study. The experimental apparatus consisted of the cartridge heater, thermocouples, test tube, acryl tube, vacuum pump, pressure indicator, volt slider and shunt resistance. The temperatures near the cartridge heater were measured by K-type thermocouples. The heat inputs were ranged from 10W to 15W. As a result, temperature of D-mannitol increased with time linearly under the solid state until the fusion temperature. When D-mannitol changed from the solid phase to the liquid phase, temperatures remained constantly due to the latent heat. Moreover, the numerical simulation was conducted using the commercial CH) code, ANSYS FLUENT. As a result of the numerical simulation, it was understood that the melting process was affected by the natural convection at the inner wall. As the heat flux of the cartridge heater input from the inner wall, the liquid fraction increased from the inner wall to the outer wall. The numerical result was compared with the experimental data. It was understood that the temperature of numerical simulation was approximately consistent with that of the experiment during the phase change process.
    AMER SOC MECHANICAL ENGINEERS, 2016, PROCEEDINGS OF ASME 9TH INTERNATIONAL CONFERENCE ON ENERGY SUSTAINABILITY, 2015, VOL 2, PowerEnergy2015-49350, 1 - 6, English
    [Refereed]
    International conference proceedings

  • TRANSIENT HEAT TRANSFER FOR HELIUM GAS FLOWING OVER A HORIZONTAL CYLINDER UNDER FLOW DECAY CONDITIONS
    Qiusheng Liu, Li Wang, Makoto Shibahara, Katsuya Fukuda
    The Very High Temperature Reactor (VHTR) is a new reactor that uses helium gas as primary coolant for conventional graphite matrix, coated fuels. It enables the achievements of high thermal efficiency and can supply heat with a high temperature of about 900-1000 degrees C. During the loss of coolant process, the fuel hot spot temperature should not get over a criteria value due to the temperature limitation of the fuel assembly. Traditionally, the VHTRs are designed to deal with loss of forced circulation conditions by using a passive mode decay heat removal system for the cavity cooling. However, even passive systems may experience some failure due to multiple undesired conditions even though the possibility is extremely low. Therefore, the VHTRs are now expected to be designed as naturally safe reactors with inherent safety features. Which means the decay heat removal is fully dependent on natural convection and radiation. To accomplish the tough task, a clear understanding of the heat transfer process during flow decay transient condition is quite necessary. This study was conducted to investigate the transient heat transfer process between the solid surface and coolant (helium gas) in VHTR under flow decay conditions. Forced convection transient heat transfer for a horizontal cylinder under flow decay transient condition was experimentally studied. The experiment was conducted by using the helium gas as coolant. A uniform heat generation rate was added to the heater. With a certain flow rate of the helium gas, the heater temperature was maintained at a designed value. Then, the flow rate of the helium gas starts to decrease according to designed linear functions with different decreasing speed. Platinum cylinder with 1 mm in diameter was used as the test heater. The heat transfer coefficient and surface temperature were measured during the flow decay transient process under wide experimental conditions such as initial flow rate, flow decay time. It was found that the temperature of the test heater increases in curve shape with different gradients during this process, with a shorter flow decay time the increasing rate of heater surface temperature would be higher. The heat transfer coefficient versus time during the flow rate decreasing process was also obtained.
    AMER SOC MECHANICAL ENGINEERS, 2016, PROCEEDINGS OF THE 24TH INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING, 2016, VOL 3, (ICONE24-60783) (ICONE24-60783), 1 - 6, English
    [Refereed]
    International conference proceedings

  • Qiusheng Liu, Li Wang, Makoto Shibahara, Katsuya Fukuda
    The Very High Temperature Reactor (VHTR) is a new reactor that uses helium gas as primary coolant for conventional graphite matrix, coated fuels. It enables the achievements of high thermal efficiency and can supply heat with a high temperature of about 900-1000°C. During the loss of coolant process, the fuel hot spot temperature should not get over a criteria value due to the temperature limitation of the fuel assembly. Traditionally, the VHTRs are designed to deal with loss of forced circulation conditions by using a passive mode decay heat removal system for the cavity cooling. However, even passive systems may experience some failure due to multiple undesired conditions even though the possibility is extremely low. Therefore, the VHTRs are now expected to be designed as naturally safe reactors with inherent safety features. Which means the decay heat removal is fully dependent on natural convection and radiation. To accomplish the tough task, a clear understanding of the heat transfer process during flow decay transient condition is quite necessary. This study was conducted to investigate the transient heat transfer process between the solid surface and coolant (helium gas) in VHTR under flow decay conditions. Forced convection transient heat transfer for a horizontal cylinder under flow decay transient condition was experimentally studied. The experiment was conducted by using the helium gas as coolant. A uniform heat generation rate was added to the heater. With a certain flow rate of the helium gas, the heater temperature was maintained at a designed value. Then, the flow rate of the helium gas starts to decrease according to designed linear functions with different decreasing speed. Platinum cylinder with 1 mm in diameter was used as the test heater. The heat transfer coefficient and surface temperature were measured during the flow decay transient process under wide experimental conditions such as initial flow rate, flow decay time. It was found that the temperature of the test heater increases in curve shape with different gradients during this process, with a shorter flow decay time the increasing rate of heater surface temperature would be higher. The heat transfer coefficient versus time during the flow rate decreasing process was also obtained.
    American Society of Mechanical Engineers (ASME), 2016, International Conference on Nuclear Engineering, Proceedings, ICONE, 3(Paper No. ISHT9-R0320) (Paper No. ISHT9-R0320), 1 - 6, English
    [Refereed]
    International conference proceedings

  • Makoto Shibahara, Katsuya Fukuda, Qiusheng Liu, Koichi Hata, Yuji Nakamura, Takeo Muroga, Masayuki Tokitani, Hiroyuki Noto
    Knowledge of transient critical heat flux (CHF) for subcooled boiling of water flow is important for the design of cooling devices such as fusion reactor divertor. Heating occurs rapidly in the divertor and the heat flux is estimated to reach 10 MW/m(2) because of plasma disruption. To cope with such a heat flux under the transient condition, the use of a small inner diameter tube (<3 mm diameter) is recommended, since the use of a smaller inner diameter tube results in a higher CHF. The transient CHF of subcooled boiling of water was measured for a 1.0 mm inner diameter tube, which was heated exponentially, with inlet subcoolings ranged from 82 to 145 K and a flow velocity of 10 m/s. The heat generation rate of the tube was exponentially increased according to the function Q(0)exp(t/tau). E-folding time, tau, ranged from 182 ms to 30.5 s. It was found that the transient CHF increased as the e-folding time decreased and that CHF of the small-diameter tube was higher than that of conventional channels. This indicated that CHF is affected by the e-folding time under transient conditions.
    JAPAN SOC MECHANICAL ENGINEERS, 2016, JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY, 11(3) (3), 16 - 0037, English
    [Refereed]
    Scientific journal

  • Transient Heat Transfer for Helium Gas Flowing over a Horizontal Cylinder in a Narrow Channel
    LIU Qiusheng, MITSUISHI Akihiro, WANG Li, SHIBAHARA Makoto, FUKUDA Katsuya
    The Japan Society of Mechanical Engineers, Dec. 2015, Proceedings of the International Conference on Power Engineering-15, ICOPE-15(Paper ID:1073) (Paper ID:1073), 1 - 7, English
    [Refereed]
    International conference proceedings

  • Thermal Characteristics of Phase Change Materials for Waste Heat Recovery System
    Shibahara Makoto, LIU Qiusheng, Katsuya Fukuda
    The Japan Institute of Marine Engineering, Nov. 2015, Journal of the JIME, 50(6) (6), 63 - 70, English
    [Refereed]
    Scientific journal

  • Transient Forced Convection Heat Transfer for Water Flowing in a Small Tube with Exponentially Increasing Heat Inputs
    Makoto Shibahara, Katsuya Fukuda, Qiusheng Liu, Koichi Hata, Yuji Nakamura, Takeo Muroga, Masayuki Tokitani, Hiroyuki Noto
    Sep. 2015, The 26th International Symposium on Transport Phenomena, (125) (125), 1 - 6, English
    International conference proceedings

  • Melting Process of Phase Change Materials for Waste Heat Recovery Systems
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Sep. 2015, The 26th International Symposium on Transport Phenomena, (119) (119), 1 - 5, English
    International conference proceedings

  • Shibahara Makoto, Liu Qiusheng, Fukuda Katsuya

    Thermal characteristics of phase change materials (PCMs) were investigated experimentally to construct a fundamental database of thermal storage systems for waste heat recovery in this study. Sodium acetate trihydrate and D-mannitol which have relatively high latent heats were selected as PCMs. The heat inputs from a cartridge heater were varied from 5 to 15 W in the experiment. As a result, thermal stratification appeared in the vertical direction in the case of sodium acetate trihydrate. On the other hand, the temperature distribution of D-mannitol was not stratified because of the weaker natural convection than the case of sodium acetate trihydrate. Also, the solidification characteristics were investigated in this study. It was clarified that the degree of super cooling of D-mannitol was lower than that of sodium acetate trihydate. In addition, the thermal analyses of the chosen PCMs were conducted by thermogravimetric and differential thermal analysis (TG-DTA). Results of DTA show that the down peak of D-Mannitol was lower than that of sodium acetate trihydrate. Furthermore, the TG of D-Mannitol did not decrease at temperatures of 298.15 K to 458.15K.

    The Japan Institute of Marine Engineering, 2015, Journal of The Japan Institute of Marine Engineering, 50(6) (6), 768 - 775, English

  • Makoto Shibahara
    Overall heat transfer coefficients of the heat exchanger inserted twisted plates for CO< inf> 2< /inf> were measured. The overall heat transfer coefficients increased with mass flow rates of water at the same Reynolds number in the experiment. It is considered that the helically twisting fluid motions in the twisted heat exchanger were contributed to the heat transfer enhancements.
    Global Digital Central, 2015, Frontiers in Heat and Mass Transfer, 6(1) (1), English
    [Refereed]
    Scientific journal

  • Thermal Storage System Using Phase Change Material for Ship
    Makoto Shibahara
    本研究では航行中における排熱を蓄熱し, 停泊時に利用する蓄熱槽の開発を目的に, 相変化蓄熱材に関する基礎的な伝熱実験を実施した. 本報では, 蓄熱材に潜熱が比較的高い酢酸ナトリウム三水和物および毒性が少なく耐腐食性に優れているD—マンニトールを選定した. 実験結果より, 酢酸ナトリウム三水和物では融解時に温度成層が広範囲で発生し, 冷却時には大きな過冷却が確認された. また, 熱分析(TG-DTA)を実施した結果, D-マンニトールの熱重量は沸点まで減少せず, 過冷却も酢酸ナトリウム三水和物に比べ小さいことから中高温蓄熱槽の蓄熱材に適していることが明らかとなった.
    Sep. 2014, Proceedings of the International Symposium on Marine Engineering 2014, 136, 1 - 5, English
    [Refereed]
    International conference proceedings

  • Enhancement of Forced Convection Heat Transfer Using Twisted Heater with Exponential Heat Inputs
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Forced convection transient heat transfer coefficients have been measured for nitrogen gas flowing over a twisted heater due to exponentially increasing heat inputs (Q(0)exp(t/tau)). And then, the effect of heater configuration on transient heat transfer by a twisted heater has been investigated comparing to that of the plate heater. In the experiment, the platinum ribbon with a thickness of 0.1 mm and a width of 4.0 mm was used as a test heater. For heat transfer enhancements in single-phase flow, it was twisted at the central part of the heater with an angle of 90 degrees with respect to the upper part of the heater. The heat generation rate was exponentially increased with a function of Qoexp(t/tau). The gas flow velocity ranged from 1 to 4 m/s for the gas temperatures of 313K. The periods of heat generation rate ranged from 46 ms to 17 s. The surface temperature difference and heat flux increased exponentially as the heat generation rate increased with the exponential function. The heat transfer coefficients for twisted heater have been compared to those of the plate heater. They were 24 % higher than those of the plate one. The geometric effect (twisted effect) of heater in this study showed an enhancement on the heat transfer coefficient. It was considered that the heat transfer coefficients are affected by the change in the flow due to swirling flow on the twisted heater. Finally, the empirical correlations for quasi-steady-state heat transfer and transient one have been obtained based on the experimental data.
    AMER SOC MECHANICAL ENGINEERS, 2014, PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE - 2013, VOL 1, HT2013-17227, 1 - 6, English
    [Refereed]
    International conference proceedings

  • Heat Transfer Performance of Twisted Heat Exchanger for Carbon Dioxide Gas in a Dispersed Power Plant System Using Marine Biomass Resource
    Makoto Shibahara
    This paper is to propose a basic concept of marine renewable energy power plant system as a dispersed one, which is composed of a marine biomass plantation and a micro gas turbine. In this system, high-efficiency compact heat exchanger becomes necessary for the limit of the marine plant space. The author has already reported about a steady and transient heat transfer process for CO2 flowing over a horizontal plate under wide experimental conditions assuming a plate-type heat exchanger. For the heat transfer enhancement of the heat exchanger, the twisted plates were inserted in the tube and parallel plates. In the experiment, the overall heat transfer coefficients of the heat exchanger for carbon dioxide gas (CO2) are measured to construct a fundamental database for the proposed marine renewable energy system. Moreover, the three-dimensional analysis of the twisted heat exchanger has been conducted using the commercial CFD code, CFD2000. The twisted plate with a thickness of 0.3 mm is inserted in a tube which inner diameter is 7 mm. The gas flow velocities are ranged from 2.5 to 7.18 m/s for the inlet gas temperature of 323K. In the experiment, the overall heat transfer coefficient increases as the gas flow velocity increases. In the numerical simulation, the fluid structure in the tube has been changed caused by the twisted plate. The flow velocity near the twisted plate increases due to the blockage of the flow-pass. The temperature distribution was affected by the helically twisting fluid motion.
    AMER SOC MECHANICAL ENGINEERS, 2014, PROCEEDINGS OF THE ASME 8TH INTERNATIONAL CONFERENCE ON ENERGY SUSTAINABILITY, 2014, VOL 2, ES-FuelCell2014-6703, 1 - 7, English
    [Refereed]
    International conference proceedings

  • 加熱平板の強制対流過渡熱伝達に関する研究
    柴原 誠, Qiusheng LIU, Katsuya FUKUDA
    神戸市立工業高等専門学校, Mar. 2013, 神戸市立工業高等専門学校研究紀要, 51(51) (51), 25 - 29, Japanese
    Research institution

  • Makoto Shibahara, Takashi Takata, Akira Yamaguchi
    The three-dimensional analysis of thermal stratification in the upper plenum of MONJU is conducted using the commercial CFD code, FLUENT ver.12.1. Since the temperature gradient near the thermal stratification interface would cause thermal stress in the reactor components, it is important to understand the characteristics of thermal stratification for evaluating the structural integrity in the upper plenum. As the result of numerical analysis, it is understood that the interface of thermal stratification is influenced by the flow pattern in the upper plenum. After the jet from the core outlet impinges on the upper core structure, the hot fluid flows obliquely upward to the inner barrel under the 40% electric output and flow condition. On the other hand, the jet from the core outlet flows to the lower part of the upper plenum, and then cold fluid flows through the flow holes after the turbine trip. Hence, the flow structure has changed from the initial condition as the flow rate and temperature of the core outlet decrease due to the turbine trip. It is considered that the flow path of the flow holes has been maintained for a long duration since the thermal stratification changes the distribution of buoyancy forces. © 2013 Elsevier B.V.
    ELSEVIER, 2013, Nuclear Engineering and Design, 258, 226 - 234, English
    [Refereed]
    Scientific journal

  • Numerical Analysis of Thermal Stratification in The Reactor Upper Plenum of MONJU with 1/3 Sector and Full Sector Models
    Makoto Shibahara, Takashi Takata, Akira Yamaguchi
    Sep. 2011, Proceedings of The 14th International Topical Meeting on Nuclear Reactor Thermal hydraulics, NURETH14-578, 1 - 11, English
    [Refereed]
    International conference proceedings

  • Numerical Simulation of Dynamic Flow Structure and Thermal Stratification Phenomena in LMFBR
    Makoto Shibahara, Takashi Takata, Akira Yamaguchi
    May 2011, Proceedings of 19th International Conference on Nuclear Engineering, ICONE19-43534, 1 - 7, English
    [Refereed]
    International conference proceedings

  • Transient Heat Transfer from a Horizontal Plate in Forced Flow of Various Gases
    Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Mar. 2011, Proceedings of ASME/JSME 2011 8th Thermal Engineering Joint Conference, AJTEC2011-44067, 1 - 10, English
    [Refereed]
    International conference proceedings

  • SHIBAHARA MAKOTO, LIU Qiusheng, FUKUDA KATSUYA
    Forced convection transient heat transfer coefficients due to exponentially increasing heat input were measured for helium gas and carbon dioxide gas flowing over a partially twisted heater. A partially twisted platinum plate with a thickness of 0.1 mm was heated by electric current and used as the test heater. The gas flow velocities ranged from 1 to 10 m/s, the gas temperatures ranged from 313 K to 353 K, and the periods of heat generation rate ranged from 46 ms to 17 s. The study showed a strong enhancement in the heat transfer coefficient for the twisted heater over that of a plate heater. Compared with those of a plate heater, the heat transfer coefficients of helium gas and carbon dioxide gas were enhanced 13 % and 28 %, respectively. Correlations for quasi-steady state heat transfer of the twisted heater in helium gas and carbon dioxide gas were obtained based on the experimental data.
    日本マリンエンジニアリング学会, Nov. 2010, 日本マリンエンジニアリング学会誌, 45(Special Issue) (Special Issue), 97 - 102, English
    [Refereed]
    Scientific journal

  • Numerical Study of Three Dimensional Thermal Hydraulics Effect on Thermal Stratification Phenomena in Upper Plenum of MONJU
    Takuji Sakamoto, Makoto Shibahara, Takashi Takata, Akira Yamaguchi
    Oct. 2010, Prpceedings of 7th Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety, N7P0032, 1 - 7, English
    International conference proceedings

  • Effect of Heater Configurations on Transient Heat Transfer for Various Gases Flowing over Twisted Heater
    SHIBAHARA MAKOTO, LIU Qiusheng, FUKUDA KATSUYA
    日本機械学会, Jun. 2010, Journal of Power and Energy Systems, 4(1) (1), 262 - 273, English
    [Refereed]
    Scientific journal

  • Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Forced convection transient heat transfer coefficients were measured for various gases (helium, nitrogen, argon and carbon dioxide gas) flowing over a twisted heater due to exponentially increasing heat input (Q0exp(t/ τ)). The platinum ribbon with a thickness of 0.1 mm and a width of 4.0 mm was used as the test heater. It was twisted at the center of the heater with an angle of 45 and 90 degrees with respect to the upperpart of the heater. The heat generation rate was exponentially increased with a function of Q 0exp(t/τ). The gas flow velocities ranged from 1 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate ranged from 45 ms to 17 s. The surface temperature difference and heat flux increase exponentially as the heat generation rate increases with exponential function. The heat transfer coefficients for twisted heater were compared with those of a plate heater. They are 13 ∼ 28 % higher than those of the plate one. The geometric effect (twisted effect) of heater in this study shows an enhancement on the heat transfer coefficient. This is because the heat transfer coefficients are affected by the change in the flow due to swirling flow on the twisted heater. And also, it was understood that heat transfer coefficient increase with the angle of twisted heater due to swirl motion and raised turbulence intensity. Empirical correlations for quasi-steady-state heat transfer and transient one were obtained based on the experimental data. © 2010 by ASME.
    2010, 2010 14th International Heat Transfer Conference, IHTC 14, 2, 721 - 729, English
    International conference proceedings

  • Transient Forced Convection Heat Transfer of Helium Gas at Various Pressures and Temperatures
    Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Oct. 2009, Proceedings of 13th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, N13P1132, 1 - 13, English
    [Refereed]
    International conference proceedings

  • Enhanced Transient Heat Transfer Caused by Partially Twisted Heater in Various Gases
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Oct. 2009, Proceedings of 8th International Symposium on Marine Engineering, 54, 1 - 6, English
    [Refereed]
    International conference proceedings

  • Transient Forced Convection Heat Transfer Due to Exponentially Increasing Heat Input for Helium Gas Flowing on Narrow Plate
    SHIBAHARA MAKOTO, LIU Qiusheng, FUKUDA KATSUYA
    日本機械学会, Apr. 2009, Journal of Power and Energy Systems, 3(1) (1), 272 - 288, English
    [Refereed]
    Scientific journal

  • EFFECT OF HEATER CONFIGURATIONS ON TRANSIENT HEAT TRANSFER FOR VARIOUS GASES FLOWING OVER A TWISTED HEATER
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Forced convection transient heat transfer coefficients were measured for helium gas and carbon dioxide gas flowing over a twisted heater due to exponentially increasing heat input (Q(0)exp(t/tau)). The twisted platinum plate with a thickness of 0.1 mm was used as test heater and heated by electric current. The heat generation rate was exponentially increased with a function of Q(0)exp(t/tau). The gas flow velocities ranged from 1 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate ranged from 46 ms to 17 s. The surface temperature difference and heat flux increase exponentially as the heat generation rate increases with the exponential function. Transient heat transfer coefficients increase with increasing gas flow velocity. The geometric effect of twisted heater in this study shows an enhancement on the heat transfer coefficient. Empirical correlation for quasi-steady-state heat transfer was obtained based on the experimental data. The data for heat transfer coefficient were compared with those reported in authors' previous paper.
    AMER SOC MECHANICAL ENGINEERS, 2009, ICONE17, VOL 4, 417 - 424, English
    [Refereed]
    International conference proceedings

  • TRANSIENT HEAT TRANSFER FOR CARBON DIOXIDE FLOWING OVER A HORIZONTAL PLATE WITH EXPONENTIALLY INCREASING HEAT INPUT
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Transient heat transfer coefficients for carbon-dioxide gas flowing over a horizontal plate (ribbon) at various periods of exponentially increasing heat input was experimentally and theoretically studied. In the experimental studies, transient heat transfer coefficients were measured under various velocities and periods. The platinum plate with a thickness of 0.1 mm was used as test heater and heated by electric current. The heat generation rate was exponentially increased with a function of Q(0)exp(t/tau). The gas flow velocities ranged from I to 3 m/s, the gas temperatures ranged front 313 K to 353 K, and the periods of heat generation rate ranged from 46 ms to 17 s. The surface temperature and heat flux increase exponentially as the heat generation rate increases with the exponential function. It was clarified that the heat transfer coefficient approaches the quasi-steady-state one for the period longer than about I s, and it becomes higher for the period shorter than around I s. In the theoretical study, forced convection transient heat transfer was numerically solved based on a conventional turbulent flow model. The temperature within the boundary layer around the heater increases with the increase of the surface temperature. It is understood that the gradient of the temperature distribution near the wall of the plate is higher at a higher Surface temperature difference. The values of numerical Solutions for the heat fluxes agree well with the experimental data, though the numerical solutions for surface temperatures show some differences with the experimental data.
    AMER SOC MECHANICAL ENGINEERS, 2009, IMECE 2008: HEAT TRANSFER, FLUID FLOWS, AND THERMAL SYSTEMS, VOL 10, PTS A-C, 921 - 928, English
    [Refereed]
    International conference proceedings

  • Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Forced convection transient heat transfer coefficients were measured for helium gas and carbon dioxide gas flowing over a twisted heater due to exponentially increasing heat input (Q0exp(t/τ)). The twisted platinum plate with a thickness of 0.1 mm was used as test heater and heated by electric current. The heat generation rate was exponentially increased with a function of Q0exp(t/τ). The gas flow velocities ranged from 1 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate ranged from 46 ms to 17 s. The surface temperature difference and heat flux increase exponentially as the heat generation rate increases with the exponential function. Transient heat transfer coefficients increase with increasing gas flow velocity. The geometric effect of twisted heater in this study shows an enhancement on the heat transfer coefficient. Empirical correlation for quasisteady-state heat transfer was obtained based on the experimental data. The data for heat transfer coefficient were compared with those reported in authors' previous paper. Copyright © 2009 by ASME.
    2009, International Conference on Nuclear Engineering, Proceedings, ICONE, 4, 417 - 424, English
    [Refereed]
    International conference proceedings

  • Transient Forced Convection Heat Transfer for Carbon Dioxide Flowing over a Horizontal Plate with Exponentially Increasing Heat Input
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Nov. 2008, Proceedings of 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE2008-68603, 1 - 8, English
    [Refereed]
    International conference proceedings

  • LIU Qiusheng, FUKUDA KATSUYA, SHIBAHARA MAKOTO
    Forced convection transient heat transfer for helium gas at various periods of exponential increase of heat input to a horizontal cylinder and a plate (ribbon) was experimentally and theoretically studied. In the experimental studies, the authors measured heat flux, surface temperature, and transient heat transfer coefficients for forced convection flow of helium gas over a horizontal cylinder and a plate (ribbon) under wide experimental conditions. Empirical correlations for quasi-steady-state heat transfer and transient heat transfer were obtained based on the experimental data. In the theoretical study, transient heat transfer was numerically solved based on a turbulent flow model. The values of numerical solution for surface temperature and heat flux were compared and discussed with authors′ experimental data.
    日本伝熱学会, Oct. 2008, 日本伝熱学会論文集, 16(4) (4), 157 - 162, Japanese
    [Refereed]
    Scientific journal

  • Transient Forced Convection Heat Transfer for Carbon Dioxide Flowing over a Horizontal Plate
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Oct. 2008, Proceedings of 7th JSME-KSME Thermal and Fluids Engineering Conference, D324, 1 - 4, English
    [Refereed]
    International conference proceedings

  • Heat Transfer Performance of Plate Heater for Carbon Dioxide Gas in a Dispersed Power Plant System Using Marine Biomass Resource
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Oct. 2008, Proceedings of 3rd Pan Asian Association of Maritime Engineering Societies and Advanced Maritime Engineering Conference, 863 - 869, English
    [Refereed]
    International conference proceedings

  • Transient Heat Transfer from Single Horizontal Heaters in Forced Flow of Helium Gas at Exponentially Increasing Heat Inputs
    Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Aug. 2008, Proceedings of ASME 2008 Summer Heat Transfer Conference, HT2008-56274, 1 - 11, English
    [Refereed]
    International conference proceedings

  • Transient Heat Transfer for Forced Convection Flow of Helium Gas over Horizontal Plate
    LIU Qiusheng, SHIBAHARA MAKOTO, FUKUDA KATSUYA
    Taylor＆Francis Group, Jun. 2008, Experimental Heat Transfer, English
    [Refereed]
    Scientific journal

  • Transient Heat Transfer from Single Horizontal Heaters in Forced Flow of Helium Gas at Exponentially Increasing Heat Inputs
    Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    May 2008, Proceedings of 16thInternational Conference on Nuclear Engineering, ICONE16-48477, 1 - 7, English
    [Refereed]
    International conference proceedings

  • SHIBAHARA Makoto, LIU Qiusheng, FUKUDA Katsuya
    Forced convection transient heat transfer for Carbon Dioxide at various periods of exponentially increasing heat input to a horizontal plate (ribbon) was experimentally studied. The authors measured heat flux, surface temperature, and transient heat transfer coefficients for forced convection flow of helium gas over a horizontal plate. The gas flow velocities ranged from 1 to 3 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate, τ, ranged from 46 ms to 16 s. It was obtained that the heat transfer coefficient approaches the quasi-steady-state one for the period longer than about 1 s, and it becomes higher for the period shorter than around 1s. Empirical correlation for quasi-steady-state heat transfer was obtained based on the experimental data.
    The Japan Society of Mechanical Engineers, 2008, The proceedings of the JSME annual meeting, 2008, 13 - 14, Japanese

  • Makoto Shibahara, Qiusheng Liu, Katsuya Fukuda
    Steady and transient forced convection transient heat transfer due to exponentially increasing heat input to a heater is important as a database for safety assessment of the transient heat transfer process not only in a high temperature gas cooled reactor (HTGR) due to an accident in excess reactivity but also in high heat flux gas cooling devices such as a gas turbine and a rocket engine. In this research, forced convection transient heat transfer for helium gas at various periods of exponential increase of heat input (Qoexp(t/τ)) to a horizontal narrow plate was numerically solved based on a turbulent flow model. The platinum plate with a length of 50 mm was used as test heater. The velocities ranged from 4 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate, τ, ranged from 46 ms to 8.6 s. The values of numerical solutions for surface temperature and heat flux were compared and discussed with authors' experimental values. It was obtained that the surface temperature difference and heat flux increase exponentially as the heat generation rate increases with the exponential function. Then the temperature within the boundary layer also increases with the increase of the surface temperature. It is understood that the gradient of the temperature distribution near the wall of the plate is higher at a higher surface temperature difference. The values of numerical solutions for surface temperature and heat flux at the velocity of 6 m/s agree well with the experimental data, though they show some differences at other velocities. And also, heat transfer coefficients at the velocity of 6 m/s agree well with the experimental data, though they show some differences at other velocities. They agree wilhin 15 % at various periods and velocities. Copyright © 2008 by ASME.
    2008, International Conference on Nuclear Engineering, Proceedings, ICONE, 2, 831 - 837, English
    [Refereed]
    International conference proceedings

  • Numerical Solution of Transient Heat Transfer for Helium Gas Flowing over a Horizontal Heater with Exponentially Increasing Heat Input
    Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Oct. 2007, Proceedings of 1st Asian Symposium on Computational Heat Transfer and Fluid Flow, ASCHT2007-034, 1 - 7, English
    [Refereed]
    International conference proceedings

  • Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Transient heat transfer coefficients for helium gas flowing over a horizontal plate (ribbon) were measured under wide experimental conditions. The platinum plate with a thickness of 0.1 mm was used as test heater and heated by electric current. The heat generation rate was exponentially increased with a function of Q0exp(t/τ). The gas flow velocities ranged from 4 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate, τ, ranged from 50 ms to 17 s. The surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function. It was clarified that the heat transfer coefficient approaches the quasi-steady-state one for the period τ longer than about 1 s, and it becomes higher for the period shorter than around 1 s. The dependence of transient heat transfer on the gas flowing velocity becomes weaker when the period becomes very shorter. The gas temperature in this study shows little influence on the heat transfer coefficient. An empirical correlation for quasi-steady-state heat transfer was obtained based on the experimental data.
    日本機械学会, Mar. 2007, Journal of Power and Energy Systems, 1(1) (1), 64 - 75, English
    [Refereed]
    Scientific journal

  • SHIBAHARA Makoto, LIU Qiusheng, FUKUDA Katsuya
    Forced convection transient heat transfer for helium gas at various periods of exponential increase in heat input to a horizontal plate (ribbon) was experimentally and theoretically studied. In the experimental studies, the authors measured heat flux, surface temperature, and transient heat transfer coefficients for forced convection flow of helium gas over a horizontal plate. The gas flow velocities ranged from 4 to 10m/s, the gas temperatures ranged from 313 to 353K, and the periods of heat generation rate, τ, ranged from 46ms to 17s. Empirical correlations for quasi-steady-state heat transfer and transient heat transfer were obtained based on the experimental data. In the theoretical study, transient heat transfer was numerically solved based on a turbulent flow model. It was obtained that the surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function.
    The Japan Society of Mechanical Engineers, 2007, The proceedings of the JSME annual meeting, 2007, 279 - 280, Japanese

  • Transient heat transfer for parallel flow of helium gas over a horizontal plate
    Qiusheng Liu, Katsuya Fukuda, Makoto Shibahara, Shingo Kikumoto
    Forced. convection transient heat transfer for helium gas at various periods of exponentially increase of heat input to a honizontal plate (ribbon) was experimentally and theoretically studied. In the experimental studies, the authors measured heat flux, surface temperature, and transient heat transfer coefficients for forced convection flow of helium gas over a horizontal plate under wide experimental conditions. The gas flow velocities ranged from 4 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate, tau, ranged from 46 ms to 17 s. The pressures were from 400 to 800 kPa. It was clarified that the heat transfer coefficient approaches the quasi-steady-state one for the period longer than about 1 s, and it becomes higher for the period shorter than around 1 s. Empirical correlations for quasi-steady-state heat transfer and transient heat transfer were obtained based on the experimental data. In the theoretical study, transient heat transfer was numerically solved based on a turbulent flow model. It wash obtained that the surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function. The values of numerical solutions for surface temperature and heat flux at the velocity of 6 m/s agree well with the experimental data, though they show some differences at other velocities.
    AMER SOC MECHANICAL ENGINEERS, 2007, PROCEEDINGS OF THE ASME/JSME THERMAL ENGINEERING SUMMER HEAT TRANSFER CONFERENCE 2007, VOL 1, HT2007-32205, 1031 - 1039, English
    [Refereed]
    International conference proceedings

  • Transient Heat Transfer for Helium Gas Flowing over a Horizontal Plate with Exponentially Increasing Heat Input
    Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Aug. 2006, Proceedings of 13th International Heat Transfer Conference,, 1083, 1 - 10, English
    [Refereed]
    International conference proceedings

  • Qiusheng Liu, Makoto Shibahara, Katsuya Fukuda
    Transient heat transfer coefficients for helium gas flowing over a horizontal plate (ribbon) were measured under wide experimental conditions. The platinum plate with a thickness of 0.1 mm was used as test heater and heated by electric current. The heat generation rate was exponentially increased with a function of Q0exp(t/τ). The gas flow velocities ranged from 4 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate, τ, ranged from 50 ms to 17 s. The surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function. It was clarified that the heat transfer coefficient approaches the quasi-steady-state one for the period τ longer than about 1 s, and it becomes higher for the period shorter than around 1 s. The dependence of transient heat transfer on the gas flowing velocity becomes weaker when the period becomes very shorter. The gas temperature in this study shows little influence on the heat transfer coefficient. Empirical correlation for quasisteady-state heat transfer was obtained based on the experimental data. Copyright © 2006 by ASME.
    2006, International Conference on Nuclear Engineering, Proceedings, ICONE, 2006, 1 - 8, English
    [Refereed]
    International conference proceedings

■ MISC
  • 水の過渡流動沸騰熱伝達に関する研究
    柴原 誠, 劉秋生, 増崎貴
    Sep. 2021, 日本マリンエンジニアリング学会誌, 56(5) (5), 810 - 815, Japanese
    [Invited]
    Introduction scientific journal

  • 電力制御素子用強制水冷モジュールの伝熱特性
    SHIBAHARA MAKOTO, FUKUDA KATSUYA, LIU Qiusheng
    Mar. 2019, 日本マリンエンジニアリング学会誌, 54(2) (2), 29 - 33, Japanese
    Introduction scientific journal

  • 流動沸騰限界熱流束について
    SHIBAHARA MAKOTO, 福田 勝哉, LIU Qiusheng, 畑 幸一
    日本マリンエンジニアリング学会, Feb. 2018, 日本マリンエンジニアリング学会誌, 53(2) (2), 54 - 57, Japanese
    [Invited]
    Introduction scientific journal

  • 単相流の非定常熱伝達について
    Nakamura Yuji, 福田 勝哉, LIU Qiusheng, SHIBAHARA MAKOTO, 畑 幸一
    日本マリンエンジニアリング学会, Feb. 2018, 日本マリンエンジニアリング学会誌, 53(2) (2), 58 - 61, Japanese
    [Invited]
    Introduction scientific journal

  • 強制対流ガス冷却と伝熱促進について (特集 動力・エネルギー技術の現状と将来 : 基礎研究から先進技術まで)
    柴原 誠, Qiusheng LIU, Katsuya FUKUDA
    日本マリンエンジニアリング学会, Mar. 2013, 日本マリンエンジニアリング学会誌, 48(2) (2), 175 - 180, Japanese
    Introduction scientific journal

■ Lectures, oral presentations, etc.
  • 細管内における強制流動沸騰熱伝達の数値シミュレーション
    柴原 誠, 劉 秋生
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    [Invited]
    Oral presentation

  • 潜熱蓄熱材の熱的性質に関する研究
    八田 佑陽, 柴原 誠, 劉 秋生
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    Oral presentation

  • 細管流路における流動沸騰及び限界熱流束に関する研究
    大槻 祐貴, 柴原 誠, 劉 秋生
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    Oral presentation

  • 高濡れ性液体のサブクールプール沸騰に関する実験的研究
    魚谷 大成, 柴原 誠, 劉 秋生
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    Oral presentation

  • 白金細線を用いた水のプール膜沸騰熱伝達
    牛丸 克幸, 劉 秋生, 柴原 誠
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    Oral presentation

  • 細管内ヘリウムガスの乱流熱伝達に関する数値解析
    庄野 大志, 劉 秋生, 柴原 誠
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese

  • 白金リボン発熱体における水のプール沸騰熱伝達
    池永 康太郎, 劉 秋生, 柴原 誠
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    Oral presentation

  • 細管を用いたヘリウムガス強制対流熱伝達における内径の影響
    鈴尾 成弘, 劉 秋生, 柴原 誠
    第93 回（令和5 年度）マリンエンジニアリング学術講演会, Sep. 2023, Japanese
    Oral presentation

  • 垂直発熱体を用いた水の定常及び非定常強制対流熱伝達
    増尾 尚太, 柴原 誠, 劉 秋生
    第92回（令和4年）マリンエンジニアリング学術講演会, Oct. 2022, Japanese
    Oral presentation

  • ヘリウムガスの細管内強制対流熱伝達における加熱長さの影響
    本庄 優志, 劉 秋生, 柴原 誠
    第92回（令和4年）マリンエンジニアリング学術講演会, Oct. 2022, Japanese
    Oral presentation

  • 水平発熱体を用いた沸騰熱伝達における表面粗さの影響
    茅原 大介, 劉 秋生, 柴原 誠
    第92回（令和4年）マリンエンジニアリング学術講演会, Oct. 2022, Japanese
    Oral presentation

  • 細管流路におけるヘリウムガスの強制対流熱伝達に関する研究
    尾上 寿広, 劉 秋生, 柴原 誠
    第91回マリンエンジニアリング学術講演会, Sep. 2021

  • 垂直リボン発熱体を用いた水の強制対流熱伝達
    松井 勇樹, 劉 秋生, 柴原 誠
    第91回マリンエンジニアリング学術講演会, Sep. 2021

  • 細管におけるヘリウムガスの強制対流熱伝達の数値解析
    本庄 優志, 劉 秋生, 柴原 誠
    第91回マリンエンジニアリング学術講演会, Sep. 2021
    Oral presentation

  • 潜熱蓄熱材の自然対流熱伝達に関する研究
    松若真凜, 柴原誠, 劉秋生
    第91回マリンエンジニアリング学術講演会, Sep. 2021, Japanese
    Oral presentation

  • Natural Convection Heat Transfer for Sugar Alcohols
    M. Shibahara, M. Matsuwaka, K. Yabuuchi
    The 12th International Symposium of Advanced Energy Science, Sep. 2021, English
    Poster presentation

  • 水の過渡流動沸騰熱伝達に関する研究
    柴原 誠, 劉 秋生, 増崎 貴
    第90回日本マリンエンジニアリング学会学術講演会, Oct. 2020, Japanese
    Oral presentation

  • 細管における水の対流熱伝達特性
    劉 秋生, 柴原 誠, 中村 雄史, 笹井 勇佑
    第90回マリンエンジニアリング学術講演会,, Oct. 2020, Japanese
    Nominated symposium

  • Thermal control of phase change material using graphite powder
    Makoto Shibahara, Tatsuya Hinoki
    The 11th International Symposium of Advanced Energy Science, Sep. 2020, English
    Poster presentation

  • 細管におけるヘリウムガスの乱流非定常熱伝達
    許 峰, 劉 秋生, 川口 哲, 柴原 誠
    日本機械学会関西支部第95期定時総会講演会, Mar. 2020, Japanese
    Oral presentation

  • リボン発熱体を用いたプール核沸騰熱伝達における表面粗さの影響
    顧 源, 劉 秋生, 柴原 誠, 小川 宏樹
    日本機械学会関西支部第95期定時総会講演会, Mar. 2020, Japanese
    Oral presentation

  • 垂直発熱体における水の強制対流熱伝達に関する研究
    古川義基, 劉秋生, 柴原誠, 畑幸一
    第89回マリンエンジニアリング学術講演会, Oct. 2019, Japanese, Domestic conference
    Oral presentation

  • 狭隘流路における円管発熱体の強制対流熱伝達
    川口哲,許峰, 劉秋生, 柴原誠
    第89回マリンエンジニアリング学術講演会, Oct. 2019, Japanese, Domestic conference
    Oral presentation

  • Thermal Properties of Sugar Alcohol Phase Change Material
    Shibahara, M, Hinoki, T
    10th International Symposium of Advanced Energy Science, Sep. 2019, English, International conference
    Oral presentation

  • Study on Forced Convection Heat Transfer for Water Flowing over a Vertical Cylinder
    FURUKAWA Yoshiki, LIU Qiusheng, SHIBAHARA Makoto, HATA Koichi
    94th Annual Meeting of Kansai Branch, JSME, Mar. 2019, Japanese, Kansai Branch, JSME, Ritsumeikan University, Domestic conference
    Poster presentation

  • Transient Heat Transfer for Helium Gas Under Exponential Flow Decay Conditions
    KAWAGUCHI Satoshi, LIU Qiusheng, SHIBAHARA Makoto
    94th Annual Meeting of Kansai Branch, JSME, Mar. 2019, Japanese, Ritsumeikan University, Domestic conference
    Poster presentation

  • ヘリウムガスの指数関数状流量減少における強制対流熱伝達
    Ayumi KITANO, Qiusheng LIU, Makoto SHIBAHARA
    第二回原子力関係科学技術の基礎的研究の動向調査委員会, Jan. 2019, Japanese, 関西原子力懇談会, 大阪科学技術センター, Domestic conference
    Oral presentation

  • 電力制御素子用強制水冷却モジュールの伝熱特性
    SHIBAHARA MAKOTO, 福田 勝哉, LIU Qiusheng
    第88回日本マリンエンジニリング学術講演会, Oct. 2018, Japanese, 岡山コンベンションセンター, Domestic conference
    [Invited]
    Nominated symposium

  • Steady and Transient Forced Convection Heat Transfer for Water Flowing in a Small Tube
    SASAI Yusuke, LIU Qiusheng, SHIBAHARA Makoto
    第88回日本マリンエンジニリング学術講演会, Oct. 2018, Japanese, 岡山コンベンションセンター, Domestic conference
    Oral presentation

  • Transient Heat Transfer for Helium Gas Under Exponentially Decreasing Flow Conditions
    KITANO Ayumi, LIU Qiusheng, SHIBAHARA Makoto
    第88回日本マリンエンジニリング学術講演会, Oct. 2018, Japanese, 岡山コンベンションセンター, Domestic conference
    Oral presentation

  • 垂直細管内における過渡限界熱流束
    Nakamura Yuji, Fukuda Katsuya, LIU Qiusheng, Shibahara Makoto, Hata Koichi
    日本機械学会関西支部第93期定時総会・講演会, Mar. 2018, Japanese, 摂南大学 寝屋川キャンパス, Domestic conference
    Oral presentation

  • 細管発熱体を用いた強制対流熱伝達に関する研究
    Sasai Yusuke, LIU Qiusheng, Shibahara Makoto, Fukuda Makoto
    日本機械学会関西支部 第93期定時総会・講演会, Mar. 2018, Japanese, 摂南大学 寝屋川キャンパス, Domestic conference
    Poster presentation

  • ヘリウムガスの流量減少に伴う過渡対流熱伝達に関する研究
    Kitano Ayumi, LIU Qiusheng, Shibahara Makoto, Fukuda Katsuya
    日本機械学会関西支部 第93期定時総会・講演会, Mar. 2018, Japanese, 摂南大学 寝屋川キャンパス, Domestic conference
    Poster presentation

  • Transient Heat Transfer in Vertical Small Tube at Slow Flow Velocities
    Nakamura Yuji, Liu Qiusheng, Fukuda Katsuya, Shibahara Makoto, Hata Koichi
    International Symposium on Marine Engineering (ISME 2017), Oct. 2017, English, Tokyo International Exchange Center, Tokyo, Japan, International conference
    Oral presentation

  • Flow Boiling and High Critical Heat Flux for Subcooled Water in a Mini Channel
    Makoto Shibahara, FUKUDA KATSUYA, Qiusheng Liu, Koichi Hata
    International Symposium on Marine Engineering(ISME2017), Oct. 2017, English, Tokyo, International conference
    Oral presentation

  • Convection Heat Transfer of Helium Gas under Flow Decay Conditions
    Liu Qiusheng, Shibahara Makoto, Fukuda Katsuya
    International Symposium on Marine Engineering (ISME 2017), Oct. 2017, English, Tokyo International Exchange Center, Tokyo, Japan, International conference
    Oral presentation

  • 垂直細管内の低流速領域における非定常熱伝達に関する研究
    NAKAMURA YUJI, FUKUDA KATSUYA, LIU Qiusheng, SHIBAHARA MAKOTO, HATA KOICHI
    第87回マリンエンジニアリング学術講演会, May 2017, Japanese, 東京海洋大学, Domestic conference
    Oral presentation

  • ヘリウムガスの対流熱伝達における流量急減の影響
    石破慎也, LIU Qiusheng, FUKUDA KATSUYA, SHIBAHARA MAKOTO
    第87回マリンエンジニアリング学術講演会, May 2017, Japanese, 東京海洋大学, Domestic conference
    Oral presentation

  • サブクール強制流動沸騰の限界熱流束に関する研究
    SHIBAHARA MAKOTO, FUKUDA KATSUYA, LIU Qiusheng, HATA KOICHI
    第87回マリンエンジニアリング学術講演会, May 2017, Japanese, 東京海洋大学, Domestic conference
    Oral presentation

  • 低流速領域の垂直短管内における過渡強制対流熱伝達
    Nakamura Yuji, Fukuda Katsuya, LIU Qiusheng, Shibahara Makoto, Hata Koichi
    第86回（平成28年）マリンエンジニアリング学術講演会, Oct. 2016, Japanese, 姫路商工会議所, Domestic conference
    Oral presentation

  • 水平円柱発熱体におけるヘリウムガスの流量急減に伴う対
    Zhang Yu, LIU Qiusheng, Fukuda Katsuya, Shibahara Makoto
    第86回（平成28年）マリンエンジニアリング学術講演会, Oct. 2016, Japanese, 日本マリンエンジニアリング学会, 姫路商工会議所, Domestic conference
    Oral presentation

  • 水の細管内上向流における定常及び過渡強制対流熱伝達
    Watanabe Sho, LIU Qiusheng, Fukuda Katsuya, Hata Koichi, Shibahara Makoto, Nakamura Yuji
    第86回（平成28年）マリンエンジニアリング学術講演会, Oct. 2016, Japanese, 日本マリンエンジニアリング学会, 姫路商工会議所, Domestic conference
    Oral presentation

  • 細管内サブクール流動沸騰に関する研究
    柴原 誠, 福田 勝哉, 劉 秋生, 畑 幸一
    第86回（平成28年）マリンエンジニアリング学術講演会, Oct. 2016, Japanese, 姫路商工会議所, Domestic conference
    Oral presentation

  • FC-72を用いた細管内過渡乱流熱伝達に関する研究
    Li Yantao, Fukuda Katsuya, LIU Qiusheng, Shibahara Makoto
    第86回（平成28年）マリンエンジニアリング学術講演会, Oct. 2016, Japanese, 姫路商工会議, Domestic conference
    Oral presentation

  • RF加温時における脂肪層徐熱のためのミニチャネル冷却に関する研究
    SHIBAHARA MAKOTO
    日本ハイパーサーミア学会第３３回大会, Sep. 2016, English, つくば国際会議場, Domestic conference
    Poster presentation

  • P022 Transient Convective Heat Transfer for Helium Gas Flowing over a Horizontal Cylinder under Flow Decay Conditions
    劉 秋生, 張 宇, 三石 朗大, 王 麗, 福田 勝哉, 柴原 誠
    関西支部講演会講演論文集, Mar. 2016, Japanese, The Japan Society of Mechanical Engineers

  • 602 Effect of Pre-pressurization on Boiling Heat Transfer and Critical Heat Flux on Horizontal Vertically-Oriented Ribbon
    Min Han Htet, SAKAMOTO Rie, FUKUDA Katsuya, LIU Qinsheng, SHIBAHARA Makoto
    関西支部講演会講演論文集, Mar. 2016, English, The Japan Society of Mechanical Engineers, This study aims to examine the boiling heat transfer and CHF caused by exponentially increasing heat inputs, Q = Q_0 exp(t/τ), to a horizontal vertically-oriented platinum ribbon in a pool of water at atmospheric and saturated condition on the effect of pre- pressurization. Q_0, t and τ are initial heat generation rate, time and period, respectively. The two conditions of pre-pressure such as without and with pre-pressure up to 4.4 MPa are carried out before each experimental run. The exponential period was varied from 10 ms to 20 s. The boiling initiation and CHF occur due to heterogeneous spontaneous nucleation (HSN) by pre-pressurization. The HSN depends on surface condition. In this study, the platinum ribbon has the conditions of the surface roughness, Ra of 0.22 ± 0.02 μm and contact angle, θ, of 51.5 ± 0.7°, respectively. The measured results such as heat transfer process, boiling initiation and CHF were analyzed and compared with previous correlation on the relationship of surface condition.

  • 短い垂直円管内FC-72の過渡熱伝達
    LI YANTAO, FUKUDA KATSUYA, LIU QIUSHENG, SHIBAHARA MAKOTO
    日本機械学会関西支部第91期定時総会講演会, Mar. 2016, English, 大阪電気通信大学, Domestic conference
    Oral presentation

  • Transient Convective Heat Transfer for Helium Gas Flowing over a Horizontal Cylinder under Flow Decay Conditions
    LIU Qiusheng, ZHANG Yu, MITSUISHI AKIHIRO, FUKUDA Katsuya, SHIBAHARA Makoto
    91th Annual Meeting of Kansai Branch, JSME, Mar. 2016, Japanese, Osaka Electro-Communication University, Domestic conference
    Poster presentation

  • リボン発熱体における沸騰熱伝達及び限界熱流束に及ぼす予圧の影響
    Min Han Htet, Sakamoto Rie, FUKUDA KATSUYA, LIU QIUSHENG, SHIBAHARA MAKOTO
    日本機械学会関西支部第91期定時総会講演会, Mar. 2016, English, 大阪電気通信大学, Domestic conference
    Oral presentation

  • Transient Forced Convection Heat Transfer from a Horizontal Cylinder to Helium Gas in a Narrow Channel
    LIU Qiusheng, Akihiro Mitsuishi, Li Wang, SHIBAHARA MAKOTO, FUKUDA KATSUYA
    The Fisrt Pacific-Rim Thermal Engineering Conference, Mar. 2016, English, Waikoloa Beach Marriott Resort and Spa, Hawaii's Big Island, Hawaii, USA, International conference
    Oral presentation

  • Transient Critical Heat Flux for Subcooled Water Flowing Upward in Vertical Small Tube with Exponentially Increasing Heat Inputs
    SHIBAHARA MAKOTO, FUKUDA KATSUYA, Qiusheng Liu, Koichi Hata, Yuji Nakamura, Takeo Muroga, Masayuki Tokitani, Hiroyuki Noto
    The Fisrt Pacific-Rim Thermal Engineering Conference, Mar. 2016, English, Waikoloa Beach Marriott Resort and Spa, Hawaii's Big Island, Hawaii, USA, International conference
    Oral presentation

  • Thermal-Hydraulic Analysis for Prismatic Very High Temperature Reactor
    Li Wang, LIU Qiusheng, SHIBAHARA MAKOTO, FUKUDA KATSUYA
    The Fisrt Pacific-Rim Thermal Engineering Conference, Mar. 2016, English, Waikoloa Beach Marriott Resort and Spa, Hawaii's Big Island, Hawaii, USA, International conference
    Oral presentation

  • 低流速の非定常円管内流動非沸騰熱伝達に関する研究
    中村 雄史, FUKUDA KATSUYA, LIU Qiusheng, SHIBAHARA MAKOTO, HATA KOICHI
    第85回マリンエンジニアリング学術講演会, Oct. 2015, Japanese, 富山国際会議場, Domestic conference
    Oral presentation

  • 増加熱入力のある白金平板発熱体の水プール沸騰限界熱流束
    阪本 理恵, FUKUDA KATSUYA, LIU Qiusheng, SHIBAHARA MAKOTO
    第85回マリンエンジニアリング学術講演会, Oct. 2015, Japanese, 富山国際会議場, Domestic conference
    Oral presentation

  • 潜熱蓄熱材を用いた中低温排熱回収に関する研究
    SHIBAHARA MAKOTO, LIU Qiusheng, FUKUDA KATSUYA
    マリンエンジニアリング学術講演会, Oct. 2015, Japanese, 富山国際会議場, Domestic conference
    Oral presentation

  • 水中に置かれたリボン発熱体からの過渡熱伝達及び限界熱流束について
    ミン ハン テツ, FUKUDA KATSUYA, LIU Qiusheng, SHIBAHARA MAKOTO
    第85回マリンエンジニアリング学術講演会, Oct. 2015, English, 富山国際会議場, Domestic conference
    Oral presentation

  • 海水における二酸化炭素単一気泡の溶解・拡散過程に関する基礎的研究
    ENDO Hirohiko, LIU Qiusheng, FUKUDA Katsuya, SHIBAHARA Makoto
    第85回マリンエンジニアリング学術講演会, Oct. 2015, Japanese, 富山国際会議場, Domestic conference
    Oral presentation

  • 1208 Transient Forced Convection Heat Transfer for Various Gases
    Shibahara Makoto, Liu Qiusheng, Fukuda Katsuya
    関西支部講演会講演論文集, Mar. 2013, Japanese, The Japan Society of Mechanical Engineers

  • 1308 Transient Forced Convection Heat Transfer for Helium Gas Flowing over a Plate Heater at Various Heat Generation rates
    SHIBAHARA Makoto, Liu Qiusheng, Fukuda Katsuya
    講演論文集, Feb. 2013, Japanese, The Japan Society of Mechanical Engineers

  • 強制対流ガス冷却と伝熱促進について
    Shibahara Makoto, LIU Qiusheng, Fukuda Katsuya
    日本マリンエンジニアリング学会誌, Feb. 2013, Japanese

  • 1217 Forced Convection Heat Transfer from a Twisted Heater
    SHIBAHARA Makoto, LIU Qiusheng, FUKUDA Katsuya
    関西支部講演会講演論文集, Mar. 2010, Japanese, The Japan Society of Mechanical Engineers

  • 1212 Experimental Sudy on Transient Forced Convection Heat Transfer for Twisted Heater Due to Exponentially Increasing Heat Input
    SHIBAHARA Makoto, LIU Qiusheng, FUKUDA Katsuya
    関西支部講演会講演論文集, Mar. 2009, Japanese, The Japan Society of Mechanical Engineers

  • 822 Numerical Analysis of Forced Convection Heat Transfer for Helium Gas Due to Transient Heat Input
    Shibahara Makoto, Liu Qiusheng, Fukuda Katsuya
    関西支部講演会講演論文集, Mar. 2008, Japanese, The Japan Society of Mechanical Engineers

  • F213 Transient Heat Transfer for Helium Gas Flowing over a Horizontal Plate with Exponentially Increasing Heat Input
    Liu Q.S., Fukuda K., Shibahara M., Kikumoto S.
    Procee[d]ings of Thermal Engineering Conference, Nov. 2007, English, The Japan Society of Mechanical Engineers, Forced convection transient heat transfer for helium gas at various periods of exponential increase of heat input to a horizontal plate (ribbon) was theoretically studied. In the theoretical study, transient heat transfer was numerically solved based on a turbulent flow model. The values of numerical solution for surface temperature and heat flux were compared and discussed with authors' previous experimental data. It was clarified that the values of numerical solutions for surface temperature and heat flux at the velocity of 6m/s agree well with the experimental data, though they show some differences at other velocities.

■ Research Themes
TOP