Numerical method for vapor-liquid two phase flows based on kinetic theory of gases and development of interfacial dynamics

2015 Fiscal Year Final Research Report

• Project/Area Number: 25820038
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Hokkaido University
• Principal Investigator: Kobayashi Kazumichi 北海道大学, 工学(系)研究科(研究院), 准教授 (80453140)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 気体論境界条件 / 蒸発・凝縮 / 気液界面 / Boltzmann方程式 / Enskog-Vlasov方程式

Outline of Final Research Achievements

The aim of this study is to determine the kinetic boundary condition for the Boltzmann equation at a vapor-liquid interface during net evaporation or condensation. By using the constructed kinetic boundary conditions in the present study, we simulate vapor-liquid two-phase flows with net evaporation or condensation, e.g., cavitation bubble collapse with phase change. From this results, we shows that the kinetic boundary conditions at vapor-liquid interfaces during net evaporation and condensation are the functions of liquid temperature based on the numerical analysis of the Enskog-Vlasov equation (Enskog-DSMC method). Furthermore, we propose the boundary condition for the fluid-dynamic-type equations at a vapor-liquid interface during net evaporation and condensation.

Free Research Field

流体工学