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Determination of kinetic boundary conditions for gas-vapor binary mixture and its application

Research Project

Project/Area Number 16K06064
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Fluid engineering
Research InstitutionHokkaido University

Principal Investigator

Kobayashi Kazumichi  北海道大学, 工学研究院, 准教授 (80453140)

Co-Investigator(Kenkyū-buntansha) 藤井 宏之  北海道大学, 工学研究院, 助教 (00632580)
渡部 正夫  北海道大学, 工学研究院, 教授 (30274484)
Research Collaborator KON Misaki  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords気体論境界条件 / 蒸発・凝縮 / 気泡崩壊現象 / キャビテーション / 分子動力学 / 分子気体力学 / 凝縮係数 / Boltzmann方程式 / 2成分混合気体 / 気泡崩壊 / 2成分混合気体 / Boltmzann方程式 / 分子流体力学 / 分子気体運動論
Outline of Final Research Achievements

The aim of this study is to determine the kinetic boundary conditions for vapor (condensable gas) - gas (non-condensable gas) binary mixture. We also apply the boundary conditions for multi phase flow, especially for the analysis of bubble collapse problem.

In the present study period, molecular dynamics method was used to construct the kinetic boundary conditions for vapor-gas mixture at equilibrium. We also solved the problem of the bubble collapse using the boundary conditions obtained from the molecular dynamics simulation. As a result, it was suggested that a thin layer composed of non-condensable gas is formed in the vicinity of the gas-liquid interface when the bubble collapses, and it was indicated that the condensation coefficient becomes extremely low due to the influence of this layer. It was also revealed that the internal temperature field when bubble collapses was affected by a small amount of non-condensable gas contained in the bubble.

Academic Significance and Societal Importance of the Research Achievements

これまで蒸気分子の相変化現象に対して,その他の成分の分子の影響(例えば水分子の蒸発・凝縮現象に対する空気分子の影響)は明らかにされてこなかった.本研究より,非凝縮性気体分子が蒸気分子の蒸発・凝縮に大きな影響を及ぼすることが明らかとなった.これは学術的意義のみならず,医療やレーザーアブレーション技術などで見られるキャビテーション気泡崩壊現象の詳細な解析において有用な知見となる.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (17 results)

All 2018 2017 2016 Other

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Acknowledgement Compliant: 1 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (1 results)

  • [Journal Article] Molecular gas dynamics analysis on condensation coefficient of vapour during gas-vapour bubble collapse2018

    • Author(s)
      Kazumichi Kobayashi, Takahiro Nagayama, Masao Watanabe, Hiroyuki Fujii and Misaki Kon
    • Journal Title

      Journal of Fluid Mechanics

      Volume: 856 Pages: 1045-1063

    • DOI

      10.1017/jfm.2018.722

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of liquid?solid intermolecular force on levitation of impacting nanodroplet2018

    • Author(s)
      Tabe Hirofumi、Kobayashi Kazumichi、Yaguchi Hisao、Fujii Hiroyuki、Watanabe Masao
    • Journal Title

      Heat and Mass Transfer

      Volume: 55 Issue: 4 Pages: 993-1003

    • DOI

      10.1007/s00231-018-2474-4

    • NAID

      120006820164

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical simulation of spherical vapor-gas bubble collapse2017

    • Author(s)
      Kazumichi Kobayashi, Misaki Kon, Takahiro Nagayama, Hiroyuki Fujii, Masao Watanabe, Hiroyuki Takahira
    • Journal Title

      Proc. of Japan-U.S. Seminar on Two-Phase Flow Dynamics 2017

      Volume: 1 Pages: 3-6

    • Related Report
      2017 Research-status Report
  • [Journal Article] Kinetic boundary conditions for vapor-gas mixture2017

    • Author(s)
      Kazumichi Kobayashi, Kiyofumi Sasaki, Misaki Kon, Hiroyuki Fujii, Masao Watanabe
    • Journal Title

      Microfluidics and Nanofluidics

      Volume: - Issue: 3

    • DOI

      10.1007/s10404-017-1887-6

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Molecular dynamics simulation on kinetic boundary conditions of gas-vapor binary mixture2016

    • Author(s)
      Kazumichi Kobayash, Kiyofumi Sasaki, Misaki Kon, Hiroyuki Fujii, Masao Watanabe
    • Journal Title

      AIP Conf. Proc.

      Volume: 1786 Pages: 110001-110001

    • DOI

      10.1063/1.4967622

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 少量の非凝縮性気体を含む蒸気気泡内 の非平衡気体流れに関する数値計算2018

    • Author(s)
      山本 恭平,小林 一道,渡部 正夫,藤井 宏 之,今 美沙紀,高比 良 裕之
    • Organizer
      日本流体力学会 年会2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] Molecular Gas Dynamics Analysis of Vapor-Gas Flow inside Collapsing Bubble2018

    • Author(s)
      Kyohei Yamamoto, Kazumichi Kobayashi, Masao Watanabe, Hiroyuki Fujii, Misaki Kon, Hiroyuki Takahira
    • Organizer
      31st Rarefied Gas Dynamics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高温壁の表面粗さが衝突液滴の浮遊へ与える影響についての分子動力学解析2018

    • Author(s)
      田部 広風海, 小林 一道, 矢口 久雄, 藤井 宏之, 渡部 正夫
    • Organizer
      混相流シンポジウム2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 分子動力学法を用いた高温壁へ衝突するナノ液滴の浮遊メカニズム解析2018

    • Author(s)
      田部 広風海, 小林 一道, 矢口 久雄, 藤井 宏之, 渡部 正夫
    • Organizer
      第9回マイクロ・ナノ工学シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高温壁へ衝突する液滴の浮遊メカニズムに関する分子動力解析2018

    • Author(s)
      田部 広風海, 小林 一道, 矢口 久雄, 藤井 宏之, 渡部 正夫
    • Organizer
      日本機械学会 第96期 流体工学部門
    • Related Report
      2018 Annual Research Report
  • [Presentation] 気液界面での熱・物質輸送を考慮したマイクロバ ブル崩壊現象の分子流体力学解析2017

    • Author(s)
      小林一道
    • Organizer
      日本機械学会年次大会2017
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Numerical simulation of spherical vapor-gas bubble collapse2017

    • Author(s)
      Kazumichi Kobayashi, Misaki Kon, Takahiro Nagayama, Hiroyuki Fujii, Masao Watanabe, Hiroyuki Takahira
    • Organizer
      Japan-U.S. Seminar on Two-Phase Flow Dynamics 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 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2016

    • Author(s)
      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
    • Organizer
      第30回数値流体力学シンポジウム
    • Place of Presentation
      タワーホール船堀(東京都江戸川区)
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
  • [Presentation] 蒸気と気体で満たされた球形気泡の収縮・膨張運動に 関する分子気体力学解析2016

    • Author(s)
      永山貴大,今美沙紀,小林一道,渡部正夫,藤井宏之,高比良裕之
    • Organizer
      日本機械学会 第94期 流体工学部門 講演会
    • Place of Presentation
      山口大学工学部(山口県宇部市)
    • Year and Date
      2016-11-12
    • Related Report
      2016 Research-status Report
  • [Presentation] 気液界面のナノスケール熱流体力学2016

    • Author(s)
      小林一道
    • Organizer
      日本機械学会 2016年度年次大会
    • Place of Presentation
      九州大学伊都キャンパス(福岡県福岡市)
    • Year and Date
      2016-09-11
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Molecular dynamics simulation on kinetic boundary conditions of gas-vapor binary mixture2016

    • Author(s)
      Kazumichi Kobayash, Kiyofumi Sasaki, Misaki Kon, Hiroyuki Fujii, Masao Watanabe
    • Organizer
      30th International Symposium on Rarefied Gas Dynamics
    • Place of Presentation
      University of Victoria(Canada)
    • Year and Date
      2016-07-10
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Remarks] 熱流体物理学研究室

    • URL

      http://labs.eng.hokudai.ac.jp/labo/fluid/

    • Related Report
      2018 Annual Research Report 2017 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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