Study on unsteady flow of multi-component mixtures of gases with weak evaporation and condensation

• Project/Area Number: 16K18016
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Osaka University
• Principal Investigator: Inaba Masashi 大阪大学, 工学研究科, 助教 (00648511)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 分子気体力学 / Boltzmann方程式 / 蒸発 / 凝縮 / 多成分混合気体 / 音波 / 蒸発・凝縮

Outline of Final Research Achievements

Unsteady flows of multi-component mixtures of monatomic gase with weak evaporation and condensation were investigated on the basis of molecular gas dynamics. The multi-scale structure of unsteady flow field with evaporation and condensation at a vapor-liquid interface and also the behavior of the vapor flow in the presence of a non-condensable gas was clarified.

Academic Significance and Societal Importance of the Research Achievements

気液界面における蒸気の定常な蒸発・凝縮に関して、分子気体力学にもとづく研究は数多く行われているが、非定常な蒸発・凝縮に関してはいまだ明らかになっていない点が多く残されている。本研究で得られた成果は、多成分混合気体の非定常な弱い蒸発・凝縮をともなう流体力学の基礎方程式系となることから、基礎的かつ本質的に重要な知見である。

Research Products

• [Presentation] 蒸発・凝縮をともなう二成分混合気体の非定常な流れに関する数値解析 (2018)
  • Author(s): 稲葉匡司，矢野猛
  • Organizer: 日本流体力学会 年会2018
• [Presentation] Molecular Gas Dynamics on Unsteady Flow of Binary Gas Mixture with Evaporation and Condensation (2018)
  • Author(s): Masashi Inaba and Takeru Yano
  • Organizer: 31st International Symposium on Rarefied Gas Dynamics
  • Int'l Joint Research
• [Presentation] 蒸発・凝縮をともなう多成分混合気体の非定常な流れに関する分子気体力学解析 (2017)
  • Author(s): 稲葉匡司，矢野猛
  • Organizer: 第31回数値流体力学シンポジウム