Research activity information

• Nov. 2025 SC25, Best Research Poster Award, Time-Stepping Hamiltonian Simulation for Solving Nonlinear PDEs via a Quantum-Classical Hybrid Approach

  Sangwon Kim, Junya Onishi, Ayato Takii, Younghwa Cho, Makoto Tsubokura


• Sep. 2019 The 7th Asian Symposium on Computational Heat Transfer and Fluid Flow-2019, Best Paper Award


• Jun. 2019 International Conference on Computational Science 2019, Best papers

• Modeling and Prediction of Airborne Infection Risk in Offices: A Comprehensive CFD Study and Machine Learning Surrogate Approach

  Ayato Takii, Takahiro Ikeda, Masashi Yamakawa, Yongmann M. Chung, Minsuok Kim

  May 2026, Results in Engineering

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• A Computational Framework for Evaluating Dynamic Motion Performance of Diversified eVTOLs Using Fluid-Rigid Body Coupled Simulation with Route Tracking

  Ayato Takii, Hiroto Sato, Masashi Yamakawa, Makoto Tsubokura, Takahiro Ikeda, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi

  2026


• Fluid–Structure Interaction Simulation of an Emergency Recovery Parachute for a Flying Car

  Koki Fukusumi, Ayato Takii, Masashi Yamakawa, Yusei Kobayashi, Takahiro Ikeda, Shinichi Asao, Seiichi Takeuchi

  2026


• Effect of Horizontal Neck Twist on the Position of Droplets Reaching the Lungs

  Nonoka Ikenaga, Takahiro Ikeda, Masashi Yamakawa, Ayato Takii, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi, Minsuok Kim

  2026


• Numerical Analysis of Dolphin Kick in Competitive Swimming with Free Surface Effects

  Ayato Takii, Naoki Kabuo, Masashi Yamakawa, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi, Makoto Tsubokura

  Springer Nature Switzerland, Jul. 2025, Lecture Notes in Computer Science, 375 - 388

  In book


• Forward and turning flight simulation of flying cars and comparative evaluation of flight dynamics models considering wind disturbances

  Taiga Magata, Ayato Takii, Masashi Yamakawa, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi, Yongmann M. Chung

  Elsevier BV, Feb. 2025, Journal of Computational Science, 85, 102519 - 102519

  Scientific journal


• Simulation of Blood Flow in the Left Ventricle Considering Purkinje Fibers

  Misaki Iwai, Yusuke Nishiya, Masashi Yamakawa, Ayato Takii, Yusei Kobayashi, Takahiro Ikeda, Shinichi Asao, Seiichi Takeuchi

  2025, The International Conference on Computational Science 2025


• Comparison of Crash Simulations on Two Types of Flying Cars

  Hiroto Sato, Ayato Takii, Masashi Yamakawa, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi, Takahiro Ikeda

  2025, The International Conference on Computational Science 2025


• Flow Field Analysis of Vortex Ring State Through Descent Experiments and Simulations with a Quadcopter

  Ryuki Mori, Ayato Takii, Masashi Yamakawa, Shinichi Asao, Seiichi Takeuchi, Yusei Kobayashi, Yongmann M. Chung

  Elsevier BV, Jan. 2025, Journal of Computational Science, 102528 - 102528

  Scientific journal


• Simulation of Droplet Dispersion from Coughing with Consideration of Face Mask Motion

  Ayato Takii, Tatsuya Miyoshi, Masashi Yamakawa, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi, Makoto Tsubokura

  2024, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 14838 LNCS, 70 - 84

  International conference proceedings


• Flow Field Analysis in Vortex Ring State Using Small Diameter Rotor by Descent Simulation

  Ryuki Mori, Ayato Takii, Masashi Yamakawa, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi

  2024, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 14832 LNCS, 94 - 106

  International conference proceedings


• Effects of Wind on Forward and Turning Flight of Flying Cars Using Computational Fluid Dynamics

  Taiga Magata, Ayato Takii, Masashi Yamakawa, Yusei Kobayashi, Shinichi Asao, Seiichi Takeuchi

  2024, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 14832 LNCS, 3 - 18

  International conference proceedings


• Impact of neck angle variation on particle and virus-laden droplet transport from lung to lung using eighth-generation airway model

  Shohei Kishi, Masashi Yamakawa, Ayato Takii, Shinichi Asao, Seiichi Takeuchi, Minsuok Kim

  Jan. 2024, Journal of Computational Science, 75

  Scientific journal


• Turning Flight Simulation with Fluid-Rigid Body Interaction for Flying Car with Contra-Rotating Propellers

  Ayato Takii, Ritsuka Gomi, Masashi Yamakawa, Makoto Tsubokura

  2023, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 14073 LNCS, 566 - 577

  International conference proceedings


• Numerical Simulation of the Octorotor Flying Car in Sudden Rotor Stop

  Naoya Takahashi, Ritsuka Gomi, Ayato Takii, Masashi Yamakawa, Shinichi Asao, Seiichi Takeuchi

  2023, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 14074 LNCS, 33 - 46

  International conference proceedings


• Numerical Simulation of Virus-Laden Droplets Transport from Lung to Lung by Using Eighth-Generation Airway Model

  Shohei Kishi, Masashi Yamakawa, Ayato Takii, Tomoaki Watamura, Shinichi Asao, Seiichi Takeuchi, Minsuok Kim

  2023


• Numerical model for cough-generated droplet dispersion on moving escalator with multiple passengers

  Ayato Takii, Masashi Yamakawa, Atsuhide Kitagawa, Tomoaki Watamura, Yongmann M. Chung, Minsuok Kim

  Nov. 2022, Indoor Air, 32(11) (11)

  Scientific journal


• Takeoff simulation of eVTOL airplane with coaxial propellers by fluid–rigid body interaction

  Ritsuka Gomi, Ayato Takii, Masashi Yamakawa, Shinichi Asao, Seiichi Takeuchi, Momoha Nishimura

  Sep. 2022, Advances in Aerodynamics, 5(1) (1)

  Scientific journal


• Six degrees of freedom flight simulation of tilt-rotor aircraft with nacelle conversion

  A. Takii, M. Yamakawa, S. Asao, K. Tajiri

  Jul. 2020, Journal of Computational Science, 44

  Scientific journal


• Descending flight simulation of tiltrotor aircraft at different descent rates

  Ayato Takii, Masashi Yamakawa, Shinichi Asao

  2020, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 12143 LNCS, 178 - 190

  International conference proceedings


• Turning flight simulation of tilt-rotor plane with fluid-rigid body interaction

  Ayato Takii, Masashi Yamakawa, Shinichi Asao, Kyohei Tajiri

  2020, Journal of Thermal Science and Technology, 15(2) (2), 1 - 12

  Scientific journal


• Six Degrees of Freedom Numerical Simulation of Tilt-Rotor Plane

  Ayato Takii, Masashi Yamakawa, Shinichi Asao, K. Tajiri

  2019, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 11536 LNCS, 506 - 519

  International conference proceedings

• 布構造と剛体運動を考慮したパラシュートの流体連成解析

  滝井 郁人, 山川 勝史, 坪倉 誠

  Sep. 2025, 日本流体力学会年会2025


• Aerodynamic Analysis of VTOL Drone Using Coupled Simulations with Hierarchical Cartesian Mesh

  Ayato Takii, Yudai Hirai, Takateru Urakubo, Chihiro Kikumoto, Kousuke Suzuki, Makoto Tsubokura

  Lead, Jul. 2025, COMPSAFE2025

  [Refereed]


• 行列積状態を用いて実装した流体計算コードの性能評価

  大西順也, 滝井郁人

  Last, Dec. 2024, 第 38回数値流体力学シンポジウム


• Numerical Simulation of Flying Car with Fluid-Body Interaction using Hierarchical Cartesian Mesh

  Ayato Takii, Rahul Bale, Chung-Gang Li, Masashi Yamakawa, Makoto Tsubokura

  Lead, Jul. 2024, 12th International Conference on Computational Fluid Dynamics

  [Refereed]


• The comparison between the results of the fluid-rigid body coupled simulation and the experiment about multi-rotor aircraft

  五味律夏, 滝井郁人, 山川勝史, 浅尾慎一, 竹内誠一

  2022, 日本航空宇宙学会中部・関西支部合同秋期大会講演論文集(CD-ROM), 59th


• Turning flight simulation of flying car with coaxial propellers by coupling of fluid-rigid body

  五味律夏, 滝井郁人, 山川勝史, 浅尾慎一, 竹内誠一

  2022, 数値流体力学シンポジウム講演論文集(CD-ROM), 36th


• Numerical computation on sudden stop of rotors for the octorotor flying car in hovering

  高橋直也, 五味律夏, 滝井郁人, 山川勝史, 浅尾慎一, 竹内誠一

  2022, 数値流体力学シンポジウム講演論文集(CD-ROM), 36th


• Advancing flight simulation of “Flying car” with octo coaxial rotors by fluid-rigid body interaction

  五味律夏, 滝井郁人, 山川勝史, 浅尾慎一, 竹内誠一

  2021, 日本航空宇宙学会中部・関西支部合同秋期大会講演論文集(CD-ROM), 58th


• 筆跡鑑定のための文字画像切り取りソフトウェアの開発(第3報)

  滝井郁人, 田中昭二

  2018, 日本法科学技術学会誌, 23(Supplement) (Supplement)


• 筆跡鑑定のための文字画像切り取りソフトウェアの開発(第2報)

  滝井郁人, 田中昭二

  2017, 日本法科学技術学会誌, 22(Supplement) (Supplement)


• 筆跡鑑定のための文字画像切り取りソフトウェアの開発

  滝井郁人, 田中昭二

  2016, 日本法科学技術学会誌, 21(Supplement) (Supplement)


• 運筆方向を色相で表現した文字表示方法の検討

  紙谷卓之, 亀岡寛正, 中西景子, 矢吹理紗, 上田道夫, 田中昭二, 滝井郁人

  2016, 日本法科学技術学会誌, 21(Supplement) (Supplement)


• 理想的な文字に関する調査・研究

  上田道夫, 田中昭二, 滝井郁人, 紙谷卓之

  2014, 日本法科学技術学会誌, 19(Supplement) (Supplement)


• インタラクティブ構造格子形成システムの構築

  滝井郁人, 松野謙一, 山川勝史

  2012, 数値流体力学シンポジウム講演論文集(CD-ROM), 26th


• GUIを用いた対話型格子形成システムの構築

  滝井郁人, 松野謙一, 山川勝史

  2012, 日本機械学会計算力学講演会論文集(CD-ROM), 25th