• 世古和也,小林一道,藤井宏之,渡部正夫,集束超音波と液面の干渉による微細液滴の生成, 混相流,Accepted for publication



  • H. Fujii, Y. Yamada, Y. Hoshi, S. Ohkawa, K. Kobayashi, M. Watanabe, Light propagation model of titanium dioxide suspensions in water using the radiative transfer equation, Reaction Kinetics, Mechanisms and Catalysis, Accepted for publication, Publisher ->(Springer)
  • 森川昌太郎,立藏祐樹,小林一道,藤井宏之,渡部正夫,佐々木浩一,蒸発・凝縮を伴う球形気泡の崩壊現象における凝縮係数の影響, ながれ, Vol. 36, 105-108, 2017
  • K. Kobayashi, K. Sasaki, M. Kon, H. Fujii, M. Watanabe, Kinetic boundary conditions for vapor-gas binary mixture, Microfluidics and Nanofluidics, 2017, Accepted for publication, Publisher ->(Springer)

Master’s thesis(2017年度 修士論文)

  • 世古 和也(Kazuya SEKO),Effects of bubble cloud in liquid fountains on ultrasonic atomization
  • 谷本 聖太(Shota TANIMOTO), Surface wettability effect on expanding liquid film instability at droplet impact

Graduation thesis(2017年度 卒業論文)

  • 伊藤 一樹(Kazuki ITO), Observation of a high-speed viscoelastic droplet impact to solid surface
  • 遠藤 理一郎(Riichiro ENDO), Observation of droplet impact on solid surface using coaxial light source
  • 山本 恭平(Kyohei YAMAMOTO), Numerical simulation of the influence of non-condensable gas on collapsing vapor bubble
  • 遠藤 茂樹(Shigeki ENDO), Numerical investigation of photon transport in the human neck based on the radiative transfer theory
  • 野村 航希(Kouki NOMURA), Analysis of light propagation in random media based on the dependent scattering theory



  • M. Kon, K. Kobayashi, M. Watanabe, Kinetic boundary condition in vapor-liquid two-phase system during unsteady net evaporation/condensation, European Journal of Mechanics/ B Fluids, 2016, Accepted for publication, Publisher ->(ElSEVIER)
  • H. Fujii, Y. Yamada, K. Kobayashi, M. Watanabe, Y. Hoshi, Modeling of light propagation in the human neck for diagnoses of thyroid cancers by diffuse optical tomography, International Journal for Numerical Methods in Biomedical Engineering, 2016, Publisher ->(Wiley)
  • M. Kon, K. Kobayashi, M. Watanabe, Liquid temperature dependence of kinetic boundary condition at vapor-liquid interface, International Journal of Heat and Mass Transfer, Vol. 99, pp. 317-326, 2016, Publisher ->(ELSEVIER)
  • K. Kobayashi, K. Konno, H. Yaguchi, H. Fujii, T. Sanada, M. Watanabe, Early stage of nanodroplet impact on solid wall, Physics of Fluids, Vol. 28, 032002, 2016, Publisher ->(AIP), Archive ->
  • 今美沙紀, 小林一道, 佐々木清文, 渡部正夫, 非平衡蒸発・凝縮下の気液界面における蒸発流束の評価(Estimation of Evaporation Mass Flux at Vapor-Liquid Interface during Nonequilibrium Evaporation/condensation), 混相流(Japanese Journal of Multiphase Flow), Vol.29, pp. 493-500, 2016, Publisher ->(JStage)
  • K. Kobayashi, K. Sasaki, M. Kon, H. Fujii, M. Watanabe, Molecular dynamics simulation on kinetic boundary conditions of gas-vapor binary mixture, AIP Conf. Proc., Vol. 1786, 110002, 2016, Publisher ->(AIP).
  • M. Kon, K. Kobayashi, M. Watanabe, Molecular simulation of evaporation mass flux during net evaporation/condensation, AIP Conf. Proc., Vol. 1786, 110001, 2016, Publisher ->(AIP).
  • E. Miyakawa, H. Fujii, K. Hattori, Y. Tatekura, K. Kobayashi, M. Watanabe, Numerical study of photon migration in the presence of a void region using the radiative transfer and diffusion equations, AIP Conf. Proc., Vol. 1790, 050003, 2016, Publisher ->(AIP).
  • 渡部正夫, 小林一道,藤井宏之,北海道大学大学院工業研究院 機械宇宙工学部門 流体力学研究室(Laboratory of Fluid Dynamics, Division of Mechanical and Space Engineering, Hokkaido University), 混相流(Japanese Journal of Multiphase Flow), Vol.30, pp. 408-411, 2016.

Doctor’s thesis(2016年度 博士論文)

  • 今 美沙紀(Misaki KON),Mean-Field Kinetic Theory Based Study of Boundary Condition at Vpoar-Liquid Interface

Master’s thesis(2016年度 修士論文)

  • 磯野 俊悠(Toshihisa ISONO),Effects of surrounding gas on ethanol droplet impact on a solid surface
  • 片岡 豊(Yutaka KATAOKA), Splash generated immediately after the impact of gas-liquid interface with curvature on a solid surface
  • 永山 貴広(Takahiro NAGAYAMA), Molecular gas dynamics analysis of spherical bubble collapse filled with vapor and noncondensable gas
  • 服部 聖仁(Kiyohito HATTORI), Determination of the optical properties of melons based on a light propagation model
  • 森川 昌太郎(Shotaro MORIKAWA), Influence of condensation coefficient for spherical bubble collapse with evaporation and condensation

Graduation thesis(2016年度 卒業論文)

  • 浅川 夏越(Nagoshi ASAKAWA), Numerical simulation of vapor flow in collapsing bubble based on Boltzmann equation
  • 芦田 拓(Taku ASHIDA), Observation of splash generated immediately after the high-speed droplet impact in a pressure-reduced chamber
  • 澤井 冴(Sae SAWAI), Numerical analysis of liquid drop impact with non-equilibrium phase change by using ghost fluid method
  • 田林 孝介(Kosuke TABAYASHI), Numerical modeling of light and pressure propagations for biomedical photoacoustic tomography
  • 田部 広風海(Hirofumi TABE), Molecular dynamics simulation of the role of the wettability in the droplet impact on a high-temperature wall



  • J. Kawahara, M. Watanabe, K. Kobayashi, How do bubbles reduce the speed of sound in a bubbly liquid in a duct?, Mechanical Engineering Letters, Vol. 1, 15-00464, 2015, Publisher (Open access) ->(Jstage)
  • K. Kobayashi, K. Hori, M. Kon, K. Sasaki, M. Watanabe, Molecular dynamics study on evaporation and reflection of monatomic molecules to construct kinetic boundary condition in vapor-liquid equilibria, Heat and Mass Transfer, accepted, 1-9, 2015, Publisher ->(Springer)
  • Y. Tatekura, T. Fujikawa, Y. Jinbo, T. Sanada, K. Kobayashi, M. Watanabea, Observation of Water-Droplet Impacts with Velocities of O(10 m/s) and Subsequent Flow Field, ECS Journal of Solid State Science and Technology, Vol. 4, N117-N123, 2015, Publisher ->(ECS), Archive ->
  • T. Sanada and M. Watanabe, Photoresist and Thin Metal Film Removal by Steam and Water Mixed Spray, Journal of Photopolymer Science and Technology, Vol. 28, 289-292, 2015, Publisher ->(JStage)
  • H. Fujii, S. Okawa, K. Nadamoto, E. Okada, Y. Yamada, Y. Hoshi, M. Watanbe, Numerical Modeling of Photon Migration in Human Neck Based on the Radiative Transport Equation, Journal of Applied Nonlinear Dynamics, 2015
  • 加藤昌也,渡部正夫,小林一道,真田俊之, 低圧力環境下での高速液滴衝突により発生する液膜流(Liquid film flow generated by high-speed droplet impact in low-pressure enviroment), 混相流(Japanese Journal of Multiphase Flow), Vol. 28, pp. 531-536, 2015, Publisher (Open access) ->(JStage)
  • H. Fujii, S. Okawa, K. Nadamoto, E. Okada, Y. Yamada, Y. Hoshi, and M. Watanabe, Numerical modeling of photon migration in the cerebral cortex of the living rat using the radiative transport equation, Proceedings of SPIE for the Biomedical Applications of Light Scattering IX, 9333, 1-6, 2015, Publisher -> (SPIE)
  • Y. Jinbo, K. Kobayashi, M. Watanabe, H. Takahira, Numerical simulation of bubble collapse and tranfer of vapor and noncondensable gas through the bubble interface using the ghost fluid method, Journal of Physics: Conference Series, Vol. 656, 2015, Publisher ->(IOP)
  • J. Kawahara, M. Watanabe, K. Kobayashi, Study on Pressure Wave Propagation in a Liquid Containing Spherical Bubbles in a Rectangular Duct, Journal of Physics: Conference Series, Vol. 656, 2015, Publisher ->(IOP)
  • K. Hattori, H. Fujii, Y. Tatekura, K. Kobayashi, M. Watanabe, Numerical Study of Light Propagation in Agricultural Products for Non-destructive Assessment of Food Quality, Proceedings of SPIE, Vol. 9792, 2015, Publisher -> (SPIE)

Doctor’s thesis(2015年度 博士論文)

  • 川原 潤也(Junnya KAWAHARA),Theoretical Study on the Speed of Sound in a Bubbly Liquid

Master’s thesis(2015年度 修士論文)

  • 内田 勝也(Katsuya UCHIDA),Direct numerical simulation of propagation speed of pressure wave in gas-liquid two phase flow
  • 佐々木 清文(Kiyofumi Sasaki),Molecular dynamics analysis on kinetic boundary condition of argon-neon binary system in vapor-liquid equilibria
  • 東 稜(Ryo Higashi),Splash generated immediately after the impact of high-speed droplet under low-pressure environment
  • 堀 優作(Usaku Hori),Development of high-speed liquid jet injector using piezo actuator
  • 山口 陽平(Youhei Yamgaguchi),Liquid film flow generated immediately after the water-droplet impact on a solid surface

Graduation thesis(2015年度 卒業論文)

  • 世古 和也(Kazuya SEKO), Liquid jet induced by the interaction focused ultrasound and curved surface of liquid
  • 古谷 祥平(Shohei FURUYA), Molecular dynamics simulation of droplet impact on heated solid surface
  • 宮川 江里菜(Erina MIYAKAWA), Numerical modeling of photon migration in the human neck for biomedical optical imaging
  • 吉田 克麻(Maya YOSHITA), Observation of splash from high-speed water droplet impact in low pressure environment



  • M. Kon, K. Kobayashi, M. Watanabe, Method of determining kinetic boundary conditions in net evaporation/condensation, Physics of Fluids, Vol. 26, 072003, 2014, Publisher ->(AIP), Archive -> 
  • H. Fujii, S. Okawa, Y. Yamada, and Y. Hoshi, Hybrid model of light propagation in random media based on the time-dependent radiative transfer and diffusion equations, J. Quant. Spectrosc. Radiat. Transfer, Vol. 147, 145-154, 2014, Publisher ->(Elsevier)
  • M. Kon, K. Kobayashi, M. Watanabe, Numerical analysis of kinetic boundary conditions at net evaporation/condensation interfaces in various liquid temperatures based on mean-field kinetic theory, AIP Conference Proceedings, Vol. 1628, 398-403, 2014, Publisher ->(AIP)
  • K. Kobayashi, K. Hori, H. Yaguchi, M. Watanabe, Molecular dynamics simulation on evaporation molecules in a vapor-liquid equilibrium state, AIP Conference Proceedings, Vol. 1628, 404-410, 2014, Publisher ->(AIP)

Master’s thesis(2014年度 修士論文)

  • 齊藤 一騎(Ikki SAITO),  Numerical analysis of high-speed droplet spray flow from a converging-diverging nozzle
  • 笹川 裕万(Yuma SASAGAWA),  Effects of ambient gas on ethanol droplet impact on a solid wall
  • 加藤 昌也(Masaya KATO),  Observation of liquid film flow generated by high-speed droplet impact in a vacuum chamber
  • 金野 一生(Kazuki KONNO),  Molecular dynamics simulation on lamellar flow induced by nano-droplet impact on solid surfaces
  • 片平 圭佑(Keisuke KATAHIRA),  Evaluation of kinetic boundary conditions of methanol and ethanol vapors by shock tube experiment and molecular gas dynamics analysis

Graduation thesis(2014年度 卒業論文)

  • 磯野 俊悠(Toshihisa ISONO),  Observation of ethanol droplet impact in ethanol vapor and development of the droplet generator
  • 片岡 豊(Yutaka KATAOKA),  Development of high speed droplet injector
  • 永山 貴大(Takahiro NAGAYAMA),  Numerical simulation of vapor condensation induced by shock wave based on Boltzmann equation for binary gas mixture
  • 服部 聖仁(Kiyohito HATTORI),  Numerical analysis of light propagation in scattering media with different optical properties
  • 森川 昌太郎(Shotaro MORIKAWA),  Numerical simulation of mathematical model for dynamics of a spherical vapor bubble accompanied by phase changes at vapor-liquid interface