Abstraction of Microscopic Information and Establishment of Boundary Condition on Phase Change by Molecular Dynamics, Molecular Gas Dynamics and Experiment

• Project/Area Number: 17360074
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Fluid engineering
• Research Institution: Hokkaido University
• Principal Investigator: FUJIKAWA Shigeo Hokkaido University, 大学院・工学研究科, 教授 (70111937)
• Co-Investigator(Kenkyū-buntansha): YANO Takeru 大阪大学, 大学院・工学研究科, 教授 (60200557) ; ICHIJO Makoto 北海道大学, 大学院・工学研究科, 助教 (50001988)
• Project Period (FY): 2005 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥16,440,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥1,140,000); Fiscal Year 2008: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2007: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2006: ¥4,200,000 (Direct Cost: ¥4,200,000); Fiscal Year 2005: ¥7,300,000 (Direct Cost: ¥7,300,000)
• Keywords: 気液界面 / 相変化 / 蒸発係数 / 凝縮係数 / 分子動力学 / 分子気体力学 / 蒸発・凝縮 / 気体論境界条件 / 流体工学 / 界面 / 境界条件

Research Abstract

本研究は分子動力学、分子気体力学、衝撃波管実験により,非平衡気液界面での相変化について以下のことを明らかにしたものである。(1)物理的に正しい気体論境界条件を分子動力学解析により定式化し、この境界条件を用いた分子気体力学解析により流体力学方程式の気液境界条件を導いた。(2)水とメタノールの凝縮係数は非平衡状態では1よりも小さな値をとり、平衡状態に近づくにつれてそれぞれの蒸発係数の値に漸近する。(3)ナノ液滴の蒸発係数は微小な液滴ほど蒸発係数が小さい。(4)ナノ液滴の飽和蒸気圧は微小な液滴ほど蒸気圧が高い。(5)ナノ液滴の表面張力は微小な液滴ほど表面張力が小さい。

Research Products

• [Journal Article] アルゴンのナノ液滴と蒸気の気液平衡状態の分子動力学 (2009)
  • Author(s): 矢口久雄・矢野猛・藤川重雄
  • Journal Title: 日本機械学会論文集(B) (掲載決定)
  • Peer Reviewed
• [Journal Article] Molecular Gas Dynamics on Condensation and Evaporation of Water Induced by Sound Waves (2009)
  • Author(s): Inaba, M., Fujikawa, S. and Yano, T.
  • Journal Title: Rarefied Gas Dynamics(AIP Proceedings) Vol.1084 Pages: 671-676
  • Peer Reviewed
• [Journal Article] アルゴンのナノ液滴と蒸気の気液平衡状態の分子動力学 (2009)
  • Author(s): 矢口久雄、矢野猛、藤川重雄
  • Journal Title: 日本機械学会論文集(B1編)(掲載決定) (未定)
  • Peer Reviewed
• [Journal Article] Molecular Gas Dynamics on Condensation and Evaporation of Water Induced by Sound Waves (2009)
  • Author(s): Inaba, M., Yano, T. and Fujikawa, S.
  • Journal Title: Rarefied Gas Dynamics (American Institute of Physics) 1084 Pages: 671-676
  • Peer Reviewed
• [Journal Article] Condensation Coefficient of Water in a Weak Condensation State (2009)
  • Author(s): Kobayashi, K., Watanabe, S., Yamano, D., Yano, T. and Fuiikawa, S.
  • Journal Title: Fluid Dynamics Research 40 Pages: 585-596
  • NAID: 10021168647
  • Peer Reviewed
• [Journal Article] Condensation Coefficient of Water in a Weak CondensationState (2008)
  • Author(s): Kobayashi, K., Watanabe, S., Yamano, D.,Yano, T. and Fujikawa, S.
  • Journal Title: Fluid Dynamics Research Vol.40 Pages: 585-596
  • Peer Reviewed
• [Journal Article] Condensation Coefficient of Water in a Weak Condensation State (2008)
  • Author(s): Kobayashi, K., Watanabe, S., Yamano, D., Yano, T. and Fujikawa, S.
  • Journal Title: Fluid Dynamics Research(Elsevier) 特集号(印刷中)
  • NAID: 10021168647
  • Peer Reviewed
• [Journal Article] Condensation and Evaporation Induced by a Standing Sound Wave (2007)
  • Author(s): Inaba, M., Kobayashi, K., Yano, T. and Fujikawa, S.
  • Journal Title: Proceedings of the 6th International Conference on Multiphase Flow(Leipzig, Germany) (CD-ROM) Pages: 1-5
  • Peer Reviewed
• [Journal Article] Molecular Dynamics Study of Evaporation of Nanodroplets (2007)
  • Author(s): Yaguchi, H., Yano, T. and Fujikawa, S.
  • Journal Title: Proceedings of the 6th International Conference on Multiphase Flow(Leipzig, Germany) (CD-ROM) Pages: 1-5
  • Peer Reviewed
• [Journal Article] Molecular Gas Dynamics Approaches to Interfacial Phenomena Accompanied with Condensation (2006)
  • Author(s): S.Mikami, K.Kobayashi, T.Ota, S.Fujikawa, T.Yano, M.Ichijo
  • Journal Title: Experimental Thermal and Fluid Science 30・8 Pages: 795-800
• [Journal Article] Shock-Tube-Deduced Condensation Coefficients of Methanol and Water Vapors (2006)
  • Author(s): S.Watanabe, K.Kobayashi, M.Inaba, S.Fujikawa, T.Yano, M.Ichijo
  • Journal Title: Proceedings of International Symposium on Advanced Fluid/Solids Science and Technology in Experimental Mechanics CD-ROM Pages: 183-186
• [Journal Article] Molecular Gas Dynamics Approaches to Interfacial Phenomena Accompanied with Condensation (2006)
  • Author(s): S.Mikami, K.Kobayashi, T.Ota, S.Fujikawa, T.Yano, M.Ichijo
  • Journal Title: Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics (印刷中)
• [Journal Article] Kinetic Boundary Condition at aVapor-Liquid Interface (2005)
  • Author(s): Ishiyama, T., Yano, T. and Fujikawa, S.
  • Journal Title: Physical Review Letters Vol.95
• [Journal Article] Kinetic Boundary Condition at a Vapor-Liquid Interface (2005)
  • Author(s): T.Ishiyama, T.Yano, S.Fujikawa
  • Journal Title: Physical Review Letters 95・8
  • NAID: 120000960594
• [Journal Article] 衝撃波管管端でのメタノール蒸気の凝縮過程に関する分子気体力学解析 (2005)
  • Author(s): 矢野猛, 小林一道, 藤川重雄
  • Journal Title: 日本機械学会論文集(B編) 71・702 Pages: 428-435
  • NAID: 110005051420
• [Journal Article] Molecular Dynamics Study on the Evaporation Part of the Kinetic Boundary Condition at the Interface between Water and Water Vapor (2005)
  • Author(s): T.Ishiyama, T.Yano, S.Fujikawa
  • Journal Title: Rarefied Gas Dynamics, AIP Conference Proceedings 762 Pages: 491-496
• [Journal Article] Condensation of Methanol Vapor onto its Liquid Film on a Solid Wall behind a Reflected a Shock Wave (2005)
  • Author(s): T.Yano, K.Kobayashi, S.Fujikawa
  • Journal Title: Rarefied Gas Dynamics, AIP Conference Proceedings 762 Pages: 208-213
• [Presentation] Molecular Transport Phenomenaand the Kinetic Boundary Conditionat the Vapor-Liquid Interface (2009)
  • Author(s): Fujikawa, S.
  • Organizer: The7^<th>World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics International Congress of Theoretical and Applied Mechanics(ICTAM)
  • Place of Presentation: Jagiellonian University's Auditorium Maximum, Krakow, Poland
  • Year and Date: 2009-07-01
• [Presentation] A Molecular Dynamics Study of Vapor Flow Induced by Evaporation from a Nanodroplet (2008)
  • Author(s): Yaguchi, H., Yano, T. and Fujikawa, S.
  • Organizer: The 7th JSME-KSME Thermal and Fluids Engineering Conference
  • Place of Presentation: Kaderu 2.7, Sapporo
  • Year and Date: 2008-10-16
• [Presentation] Dependence of Saturated Vapor Pressureand Surface Tension Coefficient on Radius for an Argon Nanodroplet (2008)
  • Author(s): Yaguchi, H., Yano, T. and Fujikawa, S.
  • Organizer: The XXIIInternational Congress of Theoreticaland Applied Mechanics(ICTAM)
  • Place of Presentation: the Adelaide Convention Centre, Adelaide, Australia
• [Remarks]
  • URL: http://mech-me.eng.hokudai.ac.jp/~info/
• [Remarks]
  • URL: http://mech-me.eng.hokudai.ac.jp/~info/
• [Remarks]
  • URL: http://mech-me.eng.hokudai.ac.jp/~info/