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Development of 3-D vortex method for bubbly jet and construction of parallel computing system

Research Project

Project/Area Number 19560167
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionNagoya University

Principal Investigator

UCHIYAMA Tomomi  Nagoya University, エコトピア科学研究所, 准教授 (90193911)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords混相流 / 数値流体力学 / 気液二相流 / 渦法 / 気泡流 / 並列計算 / 高速化 / 気泡プルーム / 渦構造 / Lagrange型解法 / 気液ニ相流 / Lagrange解法
Research Abstract

液相噴流中に微小な気泡を含む気泡噴流に対する, 三次元渦法を開発した.液相の渦度場を多数の渦要素で離散化し, 渦要素の挙動と気泡の運動を追跡するLagrange型解法である. 気泡運動が液相流れに及ぼす影響は, 循環の強度変化として考慮する. すなわち, 渦度場を計算格子に分割し, 各格子において気泡による循環の時間変化を計算し, それを格子内の渦要素の強度変化として考慮する方法である.
気泡噴流の一形態である気泡プルームの解析に本解法を適用した. その結果, 従来の実験結果と一致する流れ場が得られ, 本解法の妥当性を確認できた.
また, 3台のパソコンを接続した並列計算システムを構築し, シミュレーションを実施した. その結果, 同等の性能をもつパソコン1台を用いた場合の約半分の時間でシミュレーションできた.すなわち, 計算の高速化を実現できた.
以上の研究により, 気泡噴流に対する三次元渦法と高速計算システムがほぼ完成された.

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (16 results)

All 2008 2007 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (9 results) Remarks (3 results)

  • [Journal Article] Numerical Simulation of Bubbly Flow around Two Tandem Square-Section Cylinders by Vortex Method2008

    • Author(s)
      Degawa, T. and Uchiyama, T.
    • Journal Title

      J. Mechanical Engineering Science, IMechE Vol.222

      Pages: 225-234

    • Related Report
      2008 Final Research Report 2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical simulation of plane bubble plume by vortex method2008

    • Author(s)
      Uchiyama, T. and Tomohiro Degawa
    • Journal Title

      J. Mechanical Engineering Science, IMechE Vol.222

      Pages: 1193-1201

    • NAID

      110006271354

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Plane Bubble Plume by Vortex Method2008

    • Author(s)
      Tmomi Uchiyama, Tomohiro Degawa
    • Journal Title

      J. Mechanical Engineering Science, IMechE 222

      Pages: 1193-1201

    • NAID

      110006271354

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Simulation of Plane Bubble Plume by Vortex Method2008

    • Author(s)
      Uchiyama, T. and Degawa, T.
    • Journal Title

      J. Mechanical Engineering Science, IMechE (掲載決定・印刷中)

    • NAID

      110006271354

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 三次元渦法による平面気泡プルームの数値解析2008

    • Author(s)
      内山知実, ほか2名
    • Organizer
      日本混相流学会年会講演会
    • Place of Presentation
      会津
    • Year and Date
      2008-08-10
    • Related Report
      2008 Final Research Report
  • [Presentation] 三次元渦法による平面気泡ブルームの数値解析2008

    • Author(s)
      内山知実, 松村彰士, 出川智啓
    • Organizer
      日本混相流学会年会講演会
    • Place of Presentation
      会津大学
    • Year and Date
      2008-08-10
    • Related Report
      2008 Annual Research Report
  • [Presentation] 渦法による翼周りの気泡流の数値シミュレーション2007

    • Author(s)
      出川智啓, 内山知実
    • Organizer
      日本機械学会流体工学部門講演会
    • Place of Presentation
      広島大学
    • Year and Date
      2007-11-17
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] Vortex Simulation of the Bubbly Flow around a Hydrofoil2007

    • Author(s)
      Degawa, T. and Uchiyama, T
    • Organizer
      9th Int. Conf. Fluid Machinery
    • Place of Presentation
      Jeju
    • Year and Date
      2007-10-16
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] Numerical Prediction for the Bubbly Flow around a Hydrofoil by Vortex Method2007

    • Author(s)
      Uchiyama, T. and Degawa, T
    • Organizer
      5th Joint ASME/JSME Fluid Eng. Conf
    • Place of Presentation
      San Diego
    • Year and Date
      2007-08-02
    • Related Report
      2008 Final Research Report
  • [Presentation] Numerical Prediction for the Bubbly Flow around a Hydrofoil by Vortex Method2007

    • Author(s)
      Uchiyama, T. and Degawa, T.
    • Organizer
      5th Joint ASME/JSME Fluid Eng. Conf.
    • Place of Presentation
      San Diego
    • Year and Date
      2007-08-02
    • Related Report
      2007 Annual Research Report
  • [Presentation] Numerical Simulation of Bubbly Flow around a Pair of Tandem Square Cylinders by Vortex Method2007

    • Author(s)
      Degawa, T. and Uchiyama, T
    • Organizer
      6th Int. Conf. Multiphase Flow
    • Place of Presentation
      Leipzig
    • Year and Date
      2007-07-13
    • Related Report
      2008 Final Research Report
  • [Presentation] Numerical Simulation of Bubbly Flow around a Pair of Tandem Square Cylinders by Vortex Method2007

    • Author(s)
      Degawa, T. and Uchiyama, T.
    • Organizer
      6th Int. Conf. Multiphase. Flow
    • Place of Presentation
      Leipzig
    • Year and Date
      2007-07-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] 翼まわりの気泡流の渦法シミュレーション2007

    • Author(s)
      出川智啓・内山知実
    • Organizer
      日本混相流学会年会講演会
    • Place of Presentation
      札幌
    • Year and Date
      2007-06-22
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Remarks]

    • URL

      http://www.flow.cs.is.nagoya-u.ac.jp/index.html

    • Related Report
      2008 Final Research Report
  • [Remarks]

    • URL

      http://www.flow.cs.is.nagoya-u.ac.jp/

    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://www.flow.human.nagoya-u.ac.jp/animation.html

    • Related Report
      2007 Annual Research Report

URL: 

Published: 2007-04-01   Modified: 2016-04-21  

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