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Elucidation and control of coherent structures and large-scale turbulence structures based on saddle solutions

Research Project

Project/Area Number 19360085
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

KAWAHARA Genta  Osaka University, 大学院・基礎工学研究科, 教授 (50214672)

Co-Investigator(Kenkyū-buntansha) KIDA Shigeo  京都大学, 大学院・工学研究科, 教授 (70093234)
NISHIOKA Michio  大阪府立大学, 大学院・工学研究科, 名誉教授 (60081444)
Research Collaborator JIMENEZ J.  マドリード工科大学, 航空学部, 教授
PINELLI A.  スペインエネルギー環境中央研究所, 主任研究員
UHLMANN M.  カールスルーエ工科大学, 流体力学研究所, 教授
VAN VEEN L.  オンタリオ工科大学, 理学部, 助教授
Project Period (FY) 2007 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥20,410,000 (Direct Cost: ¥15,700,000、Indirect Cost: ¥4,710,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2008: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2007: ¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Keywords乱流 / 壁乱流 / 周期サドル解 / 縦渦 / ストリーク / 乱流二次流れ / 乱流制御 / 国際情報交換(ドイツ:スペイン:カナダ) / 国際情報交換(ドイツ : スペイン : カナダ) / 国際情報交換(スペイン:カナダ)
Research Abstract

The aim of this work is to elucidate or control coherent structures and large-scale turbulence structures using unstable periodic and steady traveling-wave solutions to the Navier-Stokes equation. In a plane Couette system dynamical flow behavior in transition to turbulence has been characterized in terms of the unstable manifold of the periodic orbit on the basin boundary between laminar and turbulent attractors, while a drag reduction has been accomplished by use of control input confined to the near-wall regions. The traveling-wave solution has been discovered in square-duct flow to be used for demonstration of direct relevance between coherent structures and turbulence-driven secondary flow.

Report

(4 results)
  • 2009 Annual Research Report   Final Research Report ( PDF )
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (45 results)

All 2010 2009 2008 2007 Other

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (34 results) Remarks (1 results)

  • [Journal Article] Reynolds number dependence of mean flow structure in square duct turbulence2010

    • Author(s)
      A. Pinelli, M. Uhlmann, A. Sekimoto, G. Kawahara
    • Journal Title

      Journal of Fluid Mechanics Vol.644

      Pages: 107-122

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Reynolds number dependence of mean flow structure in square duct turbulence2010

    • Author(s)
      A.Pinelli, M.Uhlmann, A.Sekimoto, G.Kawahara
    • Journal Title

      Journal of Fluid Mechanics 644

      Pages: 107-122

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical interpretation of coherent structures in near-wall turbulence2009

    • Author(s)
      G. Kawahara
    • Journal Title

      Fluid Dynamics Research Vol.41

      Pages: 64001-64001

    • NAID

      10028205072

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] 流体方程式系における不安定周期解の数値計算2009

    • Author(s)
      河原源太
    • Journal Title

      数学 61巻

      Pages: 306-316

    • NAID

      10026415337

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical interpretation of coherent structures in near-wall turbulence2009

    • Author(s)
      G.Kawahara
    • Journal Title

      Fluid Dynamics Research 41

    • NAID

      10028205072

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 流体方程式系における不安定周期解の数値計算2009

    • Author(s)
      河原源太
    • Journal Title

      数学 61

      Pages: 137-142

    • NAID

      10026415337

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Coherent structures in marginally turbulent square duct flow2008

    • Author(s)
      M. Uhlmann, A. Pinelli, G. Kawahara, A. Sekimoto
    • Journal Title

      Proceedings of IUTAM Symposium on Computational Physics and New Perspectives in Turbulence

      Pages: 137-142

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Coherent structures in marginally turbulent square duct flow2008

    • Author(s)
      M. Uhlmann, ほか3名
    • Journal Title

      IUTAM Symposium on Computational Physics and New Perspectives in Turbulence

      Pages: 137-142

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Marginally turbulent flow in a square duct2007

    • Author(s)
      M. Uhlmann, A. Pinelli, G. Kawahara, A. Sekimoto
    • Journal Title

      Journal of Fluid Mechanics Vol.588

      Pages: 153-162

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Marginally turbulent flow in a square duct2007

    • Author(s)
      M. Uhlmann, ほか3名
    • Journal Title

      Journal of Fluid Mechanics 588

      Pages: 153-162

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 水平正方形ダクトにおける乱流・浮力駆動二次流れ2010

    • Author(s)
      河原源太, 関本敦, 関山和英, M. Uhlmann, A. Pinelli
    • Organizer
      京都大学数理解析研究所研究集会
    • Place of Presentation
      京都
    • Year and Date
      2010-01-15
    • Related Report
      2009 Final Research Report
  • [Presentation] 水平正方形ダクトにおける乱流・浮力駆動二次流れ2010

    • Author(s)
      河原源太, 関本敦, 関山和英, M.Uhlmann, A.Pirelli
    • Organizer
      京都大学数理解析研究所研究集会
    • Place of Presentation
      京都大学
    • Year and Date
      2010-01-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] 正方形ダクト乱流におけるパフ構造2009

    • Author(s)
      関本敦, 河原源太, M. Uhlmann, A. Pinelli
    • Organizer
      日本機械学会第87期流体工学部門講演会
    • Place of Presentation
      名古屋
    • Year and Date
      2009-11-07
    • Related Report
      2009 Final Research Report
  • [Presentation] 正方形ダクト乱流におけるパフ構造2009

    • Author(s)
      関本敦, 河原源太, M.Uhlmann, A.Pinelli
    • Organizer
      日本機械学会第87期流体工学部門講演会
    • Place of Presentation
      名古屋工業大学
    • Year and Date
      2009-11-07
    • Related Report
      2009 Annual Research Report
  • [Presentation] Buoyancy effects on low-Reynolds-number turbulent flow in a horizontal square duct2009

    • Author(s)
      A. Sekimoto, K. Sekiyama, G. Kawahara, M. Uhlmann, A. Pinelli
    • Organizer
      Sixth International Symposium On Turbulence, Heat and Mass Transfer
    • Place of Presentation
      イタリア
    • Year and Date
      2009-09-16
    • Related Report
      2009 Final Research Report
  • [Presentation] Buoyancy effects on low-Reynolds-number turbulent flow in a horizontal square duct2009

    • Author(s)
      A.Sekimoto, K.Sekiyama, G.Kawahara, M.Uhlmann, A.Pinelli
    • Organizer
      Sixth International Symposium On Turbulence, Heat and Mass Transfer
    • Place of Presentation
      ローマ大学(イタリア)
    • Year and Date
      2009-09-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] The effect of coherent structures on the secondary flow in a square duct2009

    • Author(s)
      A. Sekimoto, M. Uhlmann, A. Pinelli, G. Kawahara
    • Organizer
      12th European Turbulence Conference
    • Place of Presentation
      ドイツ
    • Year and Date
      2009-09-09
    • Related Report
      2009 Final Research Report
  • [Presentation] The effect of coherent structures on the secondary flow in a square duct2009

    • Author(s)
      A.Sekimoto, M.Uhlmann, A.Pinelli, G.Kawahara
    • Organizer
      12th European Turbulence Conference
    • Place of Presentation
      マールブルグ大学(ドイッ)
    • Year and Date
      2009-09-09
    • Related Report
      2009 Annual Research Report
  • [Presentation] Travelling waves in a straight square duct2009

    • Author(s)
      M. Uhlmann, G. Kawahara, A. Pinelli
    • Organizer
      12th European Turbulence Conference
    • Place of Presentation
      ドイツ
    • Year and Date
      2009-09-07
    • Related Report
      2009 Final Research Report
  • [Presentation] Travelling waves in a straight square duct2009

    • Author(s)
      M.Uhlmann, G.Kawahara, A.Pinelli
    • Organizer
      12th European Turbulence Conference
    • Place of Presentation
      マールブルグ大学(ドイツ)
    • Year and Date
      2009-09-07
    • Related Report
      2009 Annual Research Report
  • [Presentation] 平面クエット系における層流-乱流吸引域境界上の周期解の不安定多様体2009

    • Author(s)
      松村篤, 河原源太, L. van Veen
    • Organizer
      日本流体力学会年会2009
    • Place of Presentation
      東京
    • Year and Date
      2009-09-04
    • Related Report
      2009 Final Research Report
  • [Presentation] 平面クエット系における層流-乱流吸引域境界上の周期解の不安定多様体2009

    • Author(s)
      松村篤, 河原源太, L.van Veen
    • Organizer
      日本流体力学会年会2009
    • Place of Presentation
      東洋大学
    • Year and Date
      2009-09-04
    • Related Report
      2009 Annual Research Report
  • [Presentation] 低レイノルズ数における加熱水平正方形ダクトの二次流れと乱流構造2009

    • Author(s)
      関本敦, 関山和英, 河原源太, M. Uhlmann, A. Pinelli
    • Organizer
      日本流体力学会年会2009
    • Place of Presentation
      東京
    • Year and Date
      2009-09-02
    • Related Report
      2009 Final Research Report
  • [Presentation] 低レイノルズ数における加熱水平正方形ダクトの二次流れと乱流構造2009

    • Author(s)
      関本敦, 関山和英, 河原源太, M.Uhlmann, A.Pinelli
    • Organizer
      日本流体力学会年会2009
    • Place of Presentation
      東洋大学
    • Year and Date
      2009-09-02
    • Related Report
      2009 Annual Research Report
  • [Presentation] 乱流現象への力学系的アプローチ2009

    • Author(s)
      河原源太
    • Organizer
      京都大学数理解析研究所研究集会
    • Place of Presentation
      京都大学
    • Year and Date
      2009-08-20
    • Related Report
      2009 Annual Research Report
  • [Presentation] 乱流現象への力学系的アプローチ2009

    • Author(s)
      河原源太
    • Organizer
      京都大学数理解析研究所研究集会
    • Place of Presentation
      京都
    • Year and Date
      2009-07-11
    • Related Report
      2009 Final Research Report
  • [Presentation] Dynamical description of transition and turbulence in terms of unstable periodic orbits2009

    • Author(s)
      G. Kawahara
    • Organizer
      RIMS (Research Institute for Mathematical Sciences) Workshop
    • Place of Presentation
      神戸
    • Year and Date
      2009-07-11
    • Related Report
      2009 Final Research Report
  • [Presentation] Dynamical description of transition and turbulence in terms of unstable periodic orbits2009

    • Author(s)
      G.Kawahara
    • Organizer
      RIMS Workshop
    • Place of Presentation
      神戸インスティテュート
    • Year and Date
      2009-07-11
    • Related Report
      2009 Annual Research Report
  • [Presentation] 高対称性を有する不安定周期運動におけるエネルギー伝達2009

    • Author(s)
      河原源太, 植田泰彦, 木田重雄, L. van Veen
    • Organizer
      第58回理論応用力学講演会
    • Place of Presentation
      東京
    • Year and Date
      2009-06-11
    • Related Report
      2009 Final Research Report
  • [Presentation] 高対称性を有する不安定周期運動におけるエネルギー伝達2009

    • Author(s)
      河原源太, 植田泰彦, 木田重雄, L.van Veen
    • Organizer
      第58回理論応用力学講演会
    • Place of Presentation
      日本学術会議
    • Year and Date
      2009-06-11
    • Related Report
      2009 Annual Research Report
  • [Presentation] The role of coherent structures in low-Reynolds-number turbulent wall flows2008

    • Author(s)
      G. Kawahara
    • Organizer
      Wall Bounded Shear Flows: Transition and Turbulence
    • Place of Presentation
      英国
    • Year and Date
      2008-09-11
    • Related Report
      2009 Final Research Report
  • [Presentation] The role of coherent structures in low-Reynolds-number turbulent wall flows2008

    • Author(s)
      河原源太
    • Organizer
      Wall Bounded Shear Flows : Transition And Turbulence
    • Place of Presentation
      Cambridge大学
    • Year and Date
      2008-09-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] Coherent structures in near-wall turbulence2008

    • Author(s)
      G. Kawahara
    • Organizer
      日本流体力学会40周年講演会
    • Place of Presentation
      神戸
    • Year and Date
      2008-09-05
    • Related Report
      2009 Final Research Report
  • [Presentation] Coherent structures in near-wall turbulence2008

    • Author(s)
      河原源太
    • Organizer
      日本流体力学会40周年講演会
    • Place of Presentation
      神戸大学
    • Year and Date
      2008-09-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] 低レイノルズ数水平正方形ダクト乱流への浮力の影響2008

    • Author(s)
      関山和英, 関本敦, 若林弘輝, 河原源太, M. Uhlmann, A. Pinelli
    • Organizer
      日本流体力学会年会2008
    • Place of Presentation
      神戸
    • Year and Date
      2008-09-04
    • Related Report
      2009 Final Research Report
  • [Presentation] 低レイノルズ数における水平正方形ダクト乱流への浮力の影響2008

    • Author(s)
      関山和英, 関本敦, 若林弘輝, 河原源太, M. ウルマン, A. ピネリ
    • Organizer
      日本流体力学会年会2008
    • Place of Presentation
      神戸大学
    • Year and Date
      2008-09-04
    • Related Report
      2008 Annual Research Report
  • [Presentation] 乱流中の不安定周期軌道の数値計算2008

    • Author(s)
      松村篤, 河原源太
    • Organizer
      第58回理論応用力学講演会
    • Place of Presentation
      東京
    • Year and Date
      2008-06-12
    • Related Report
      2009 Final Research Report
  • [Presentation] 乱流中の不安定周期運動の数値計算2008

    • Author(s)
      松村篤, 河原源太
    • Organizer
      第58回理論応用力学講演会
    • Place of Presentation
      日本学術会議
    • Year and Date
      2008-06-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] 低レイノルズ数正方形ダクト乱流における渦構造2007

    • Author(s)
      関本敦, 河原源太, M. Uhlmann, A. Pinelli
    • Organizer
      第85期日本機械学会流体工学部門講演会
    • Place of Presentation
      広島
    • Year and Date
      2007-11-18
    • Related Report
      2009 Final Research Report
  • [Presentation] 低レイノルズ数正方形ダクト乱流における渦構造2007

    • Author(s)
      関本敦, ほか3名
    • Organizer
      第85期 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
      2007-11-18
    • Related Report
      2007 Annual Research Report
  • [Presentation] Approach by unstable periodic orbits to the problem of turbulence2007

    • Author(s)
      G. Kawahara
    • Organizer
      2007 SIAM Conference on Applications of Dynamical Systems
    • Place of Presentation
      アメリカ合衆国
    • Year and Date
      2007-05-28
    • Related Report
      2009 Final Research Report
  • [Presentation] Approach by unstable periodic orbits to the problem of turbulence2007

    • Author(s)
      G. Kawahara
    • Organizer
      2007 SIAM Conference on Applications of Dynamical Systems
    • Place of Presentation
      Snowbird Ski and Summer Resort(アメリカ合衆国)
    • Year and Date
      2007-05-28
    • Related Report
      2007 Annual Research Report
  • [Presentation] Coherent structures in marginally turbulent square duct flow2007

    • Author(s)
      A. Sekimoto, G. Kawahara, M. Uhlmann, A. Pinelli
    • Organizer
      The 6th Pacific Symposium on Flow Visualization and Image Processing
    • Place of Presentation
      アメリカ合衆国
    • Year and Date
      2007-05-18
    • Related Report
      2009 Final Research Report
  • [Presentation] Coherent structures in marginally turbulent square duct flow2007

    • Author(s)
      G. Kawahara, ほか3名
    • Organizer
      The 6th Pacific Symposium on Flow Visualization and Image Processing
    • Place of Presentation
      Sheraton Princess Kaiulani Hotel(アメリカ合衆国)
    • Year and Date
      2007-05-18
    • Related Report
      2007 Annual Research Report
  • [Remarks]

    • URL

      http://www-thermomech.me.es.osaka-u.ac.jp/index.html

    • Related Report
      2009 Final Research Report

URL: 

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

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