2023 Fiscal Year Final Research Report
Kinetic-theory study on gas flows in a circular pipe
| Project/Area Number |
21K14076
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 分子気体力学 / ボルツマン方程式 / エンスコグ方程式 / 円管流 / 高密度気体 |
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| Outline of Final Research Achievements |
In the present study, the Poiseuille and the thermal transpiration flows in a gas in small systems have been investigated by means of the numerical analysis of the Boltzmann and the Enskog equations. Accurate numerical results of mass flow and macroscopic fields have been obtained by the analysis of a gas flow in a circular pipe based on the Boltzmann equation. The behavior of the Poiseuille and the thermal transpiration flows of a dense gas have been clarified in detail based on the Enskog equation for a wide range of the gas denseness and the smallness of the system.
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| Free Research Field |
分子気体力学
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| Academic Significance and Societal Importance of the Research Achievements |
マイクロ・ナノデバイスや微細構造をもつ多孔質体などの微小な系内の気体の振舞いは，通常の巨視的流体力学では正確に記述できない．そのような微小系内の気体流を調べるには，微視的立場に立った分子気体力学による解析が必要である．本研究では，数値計算のアプローチにより，微細な円管内あるいは平行流路内の圧力駆動流・熱的駆動流の特性を明らかにし，その知見を蓄積することができた．
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