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Feedback Control of Nonlinear Thermocapillary Convection in a Half-zone Liquid Bridge

Research Project

Project/Area Number 14350114
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionFaculty of Science & Technology, Tokyo University of Science

Principal Investigator

KAWAMURA Hiroshi  Tokyo University of Science, Faculty of Science & Technology, Professor, 理工学部, 教授 (80204783)

Co-Investigator(Kenkyū-buntansha) NISHINO Koichi  Yokohama National University, Department of Mechanical Engineering, Professor, 工学研究院・システムの創成部門, 教授 (90192690)
UENO Ichiro  Tokyo University of Science, Faculty of Science & Technology, Assistant Professor (Ichiro Ueno left this project on 26 August 2004, because of the sabbatical leave.), 理工学部, 講師(在外研究のため途中辞退平成16年8月26日承認) (40318209)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥16,900,000)
Fiscal Year 2004: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2003: ¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 2002: ¥7,900,000 (Direct Cost: ¥7,900,000)
KeywordsMicrogravity / Thermocapillary convection / Floating-zone crystal growth / Half-zone model / Active control / Oscillatory convection / マランゴニ対流 / 結晶成長 / フィードバック制御 / マルチモード制御 / 液柱 / 高プラントル数
Research Abstract

In the microgravity condition, a buoyancy-driven convection becomes almost negligible. The floating-zone(FZ) crystal growth is a containerless method to produce high-quality semiconductors and oxides under the microgravity. In this method, a transition to three-dimensional oscillatory thermocapillary convection takes place with increasing temperature difference between the heated area and cold rods or with increasing Marangoni number Ma. It is widely known that the oscillatory convection causes detrimental defects in the crystal structure even in the space environment. Control of the convection is of great importance in order to establish high-quality material processing techniques.
As the fundamental research, a half-zone model(HZ) has been employed to simplify the thermocapillary convection in FZ. A large number of research were conducted with respect to the transition and successive flow structures in the HZ liquid bridge. Only a few works have been concerned with a control of the convection.
The present study aims to suppress the three-dimensional oscillatory thermocapillary convection in the HZ liquid bridge in a wide range of Ma. The control was applied by modifying the free surface temperature locally with the electric heaters. The control output was calculated by the simple cancellation algorithm using local surface temperature signals. In order to develop control schemes, the oscillatory convection was measured by the three-dimensional particle tracking velocimetry.
Through the experiments, significant attenuation of the oscillation was obtained for a wide range of Ma. The complete suppression of the oscillatory convection was achieved close to the critical point of the transition. The control scheme achieved a significant reduction of the temperature oscillation, also far beyond the critical point.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (23 results)

All 2005 2004 2003 Other

All Journal Article (15 results) Publications (8 results)

  • [Journal Article] 3-D PTV measurement of oscillatory thermocapillary convection in half-zone liquid bridge2005

    • Author(s)
      M.Nishimura et al.
    • Journal Title

      Experiments in Fluids 38

      Pages: 285-290

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 液柱内マランゴニ対流の局所加熱による周方向波数制御2005

    • Author(s)
      植村豪
    • Journal Title

      日本機械学会論文集(B編) 71

      Pages: 559-564

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 温度差マランゴニ効果による液柱内非線形対流場のフィードバック制御2005

    • Author(s)
      工藤正樹
    • Journal Title

      日本機械学会論文集(B編) 71(採択済)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Experiment on Multi-mode Feedback Control of Non-linear Thermocapillary Convection in a Half-Zone Liquid Bridge2005

    • Author(s)
      M.Kudo et al.
    • Journal Title

      Advances in Space Research (accepted)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 3-D PTV Measurement of Oscillatory Thermocapillary Convection in Half-Zone Liquid Bridge2005

    • Author(s)
      Mitsumasa NISHIMURA et al.
    • Journal Title

      Experiments in Fluids 38

      Pages: 285-290

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Azimuthal Wave Number Control of Oscillatory Thermocapillary Convection in a Liquid Bridge by Local Heating2005

    • Author(s)
      Suguru UEMURA et al.
    • Journal Title

      Transactions of the Japan Society of Mechanical Engineers B (in Japanese) vol.71

      Pages: 559-564

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 液柱内マランゴニ対流の局所加熱による周方向波数制御2005

    • Author(s)
      植村 豪ら
    • Journal Title

      日本機械学会論文集B編 71-702

      Pages: 559-564

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 温度差マランゴニ効果による液柱内マランゴニ対流のフィードバック制御2005

    • Author(s)
      工藤正樹ら
    • Journal Title

      日本機械学会論文集B編 (掲載決定)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 高プラントル数流体における液柱内温度差マランゴニ対流と粒子集合2004

    • Author(s)
      河村洋
    • Journal Title

      日本マイクログラビティ応用学会誌 21

      Pages: 260-266

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Thermocapillary Convection and Particle Accumulation in a Liquid Bridge of the Medium to High Prandtl Number Fluids2004

    • Author(s)
      Hiroshi KAWAMURA
    • Journal Title

      Journal of The Japan Society of Microgravity Application (in Japanese) Vol.21, No.4

      Pages: 260-266

    • NAID

      130007972039

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 液柱内温度差マランゴニ対流における粒子集合現象2004

    • Author(s)
      田中志穂ら
    • Journal Title

      日本機械学会論文集B編 70-692

      Pages: 997-1005

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Feedback control of oscillatory thermocapillary convection in a half zone liquid bridge2003

    • Author(s)
      J.Shiomi et al.
    • Journal Title

      Journal of Fluid Mechanics 496

      Pages: 193-211

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Feedback Control of Oscillatory Thermocapillary Convection in a Half-Zone Liquid Bridge2003

    • Author(s)
      Junichiro SHIOMI et al.
    • Journal Title

      Journal of Fluid Mechanics 496

      Pages: 193-211

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Feedback Control of Nonlinear Thermocapillary Convection in a Half-Zone Liquid Bridge

    • Author(s)
      Masaki KUDO et al.
    • Journal Title

      Transactions of the Japan Society of Mechanical Engineers B (in Japanese) vol.71(accepted to appear)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Experiment on Multi-mode Feedback Control on Nonlinear Thermocapillary Convection in a Half-zone Liquid Bridge

    • Author(s)
      Masaki KUDO et al.
    • Journal Title

      Advances in Space Research (accepted)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Tagaya, E. et al.: "A consideration on relation between oscillatory Marangoni flow in a liquid bridge and the Hydrothermal wave in a thin liquid bridge"Thermal Science & Engineering. 11/5. 45-46 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Ueno, I. et al.: "Various flow patterns in thermocapillary convection in half-zone liquid bridge of high Prandtl number fluid"Advances in Space Research. 32. 143-148 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nishimura, M. et al.: "3D-PTV Measurement of Oscillatory Thermocapillary Convection in Half-Zone Liquid Bridge"5^<th> Int.Symp. PIV (Sept.2003, Busan, Korea). (CD-ROM). 3114-3117 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 福井ら: "液柱内マランゴニ対流における振動流の能動的制御に関する数値解析"第40回日本伝熱シンポ講演論文集. III. 605-606 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 植村ら: "液柱内温度差マランゴニ対流の局所加熱による励起制御"第40回日本伝熱シンポ講演論文集. III. 607-608 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kawamura, H. et al.: "Study of thermocapillary flow in a liquid bridge towards an on-orbit experiment aboard the ISS"Advances in Space Research. 29. 611-618 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ueno, I. et al.: "Oscillatory and chaotic thermocapillary convection in a half-zone liquid bridge"Phys. Fluids. 15. 408-416 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nishimura, M. et al.: "Three-dimensional velocity field measurement of the thermocapillary convection in the half-zone liquid bridge"Proc. The 6^<th> ASME-JSME Thermal Engineering Joint Conf. (AJTEC2003) (Mar., 2003, Hawaii). (accepted). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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