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Turbulent/non-turbulent interface in magnetohydrodynamic channel flow in an imposed magnetic field

Research Project

Project/Area Number 26390129
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Computational science
Research InstitutionNagoya University

Principal Investigator

Okamoto Naoya  名古屋大学, 工学研究科, 助教 (80547414)

Co-Investigator(Kenkyū-buntansha) 芳松 克則  名古屋大学, 未来材料・システム研究所, 准教授 (70377802)
Co-Investigator(Renkei-kenkyūsha) ISHIHARA Takashi  名古屋大学, 工学研究科, 准教授 (10262495)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords乱流 / 電磁流体 / 直接数値計算 / 電磁流体乱流 / チャネル乱流 / 磁場 / 磁気レイノルズ数 / 界面
Outline of Final Research Achievements

Direct numerical simulations (DNSs) are performed to show the presence of turbulent/non-turbulent interfaces in a magnetohydrodynamic (MHD) turbulent channel flow under the influence of a wall-normal magnetic field. Visualization of the vorticity field reveals flow structures consisting of two internal turbulent boundary layers (ITBLs) growing from each wall and a non-turbulent channel core. The flow structures suggest the presence of an interface between the ITBL and the core. The conditional statistics of the DNS data shows that vorticity components have sharp gradients at the interface as observed in external hydrodynamic shear flows. The Joule dissipation rate, a characteristic quantity in MHD flow, is shown to have sharp gradients at the interface.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (9 results)

All 2016 2015 2014 Other

All Presentation (7 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (2 results)

  • [Presentation] Turbulent/non-turbulent interface in magnetohydrodynamic channel flow2016

    • Author(s)
      Naoya Okamoto, Yusuke Otake, Takashi Ishihara
    • Organizer
      24th International Congress of Theoretical and Applied Mechanics
    • Place of Presentation
      Montreal, Canada
    • Year and Date
      2016-08-21
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Turbulent/non-turbulent interface in magnetohydrodynamic channel flow2016

    • Author(s)
      Naoya Okamoto, Yusuke Otake, Takashi Ishihara
    • Organizer
      ICTAM 2016
    • Place of Presentation
      Montreal, Canada
    • Year and Date
      2016-08-21
    • Related Report
      2015 Research-status Report
  • [Presentation] Turbulent/non-turbulent interface in turbulent magnetohydrodynamic channel flows at low magnetic Reynolds number2015

    • Author(s)
      Naoya Okamoto, Yusuke Otake, Takashi Ishihara
    • Organizer
      Japan-Russia Workshop 2015
    • Place of Presentation
      Nagoya University
    • Year and Date
      2015-12-10
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 電磁流体乱流の直接数値シミュレーションによる原始惑星系円盤内の粒子運動の解析2015

    • Author(s)
      高橋良輔, 岡本直也, 芳松克則, 石原卓, 白石賢二, 梅村雅之
    • Organizer
      日本天文学会 2015年秋季年会
    • Place of Presentation
      甲南大学
    • Year and Date
      2015-09-09
    • Related Report
      2015 Research-status Report
  • [Presentation] Interfacial phenomena in turbulent magnetohydrodynamic channel flows at low magnetic Reynolds number2014

    • Author(s)
      Naoya Okamoto, Yusuke Otake, Takashi Ishihara
    • Organizer
      67th Annual Meeting of the APS Division of Fluid Dynamics
    • Place of Presentation
      San Francisco, California, USA
    • Year and Date
      2014-11-22 – 2014-11-24
    • Related Report
      2014 Research-status Report
  • [Presentation] 低磁気レイノルズ数電磁流体チャネル乱流における乱流・非乱流界面2014

    • Author(s)
      岡本直也, 大竹悠介, 石原 卓
    • Organizer
      日本物理学会 2014年秋季大会
    • Place of Presentation
      中部大学(春日井キャンパス)
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Research-status Report
  • [Presentation] Interfacial phenomena in turbulent magnetohydrodynamic channel flows in an imposed magnetic field2014

    • Author(s)
      Naoya Okamoto, Yusuke Otake, Takashi Ishihara
    • Organizer
      Waves and Turbulence in Rotating, Stratified and Electrically Conducting Fluids
    • Place of Presentation
      Cambridge, UK
    • Year and Date
      2014-07-14 – 2014-07-25
    • Related Report
      2014 Research-status Report
    • Invited
  • [Remarks] 名古屋大学 教員データベースシステム

    • URL

      http://profs.provost.nagoya-u.ac.jp/view/html/100002236_ja.html

    • Related Report
      2016 Annual Research Report 2014 Research-status Report
  • [Remarks] 教員データベースシステム

    • URL

      http://profs.provost.nagoya-u.ac.jp/view/html/100002236_ja.html

    • Related Report
      2015 Research-status Report

URL: 

Published: 2014-04-04   Modified: 2018-03-22  

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