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2006 Fiscal Year Final Research Report Summary

Numerical Studies of Structure Formation of Plasmas in Non-equilibrium Open System through Modeling of Inter-hierarchy Interaction

Research Project

Project/Area Number 15540386
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 原子・分子・量子エレクトロニクス・プラズマ
Research InstitutionNational Institute for Fusion Science

Principal Investigator

MIURA Hideaki  National Institute for Fusion Science, Theory and Computer Simulation Center, Associate Professor, 理論・シミュレーション研究センター, 助教授 (40280599)

Co-Investigator(Kenkyū-buntansha) MIZUGUCHI Naoki  National Institute for Fusion Science, Department of Large Helical Device Project, Research Associate, 大型ヘリカル研究部, 助手 (70332187)
Project Period (FY) 2003 – 2006
Keywordsstructural formation / numerical simulation / two-fluid model / pressure-driven instability / drift model / ELM / plasma flow / adaptive mesh refinement
Research Abstract

This study aims at developing a large-scale numerical simulation method by using a new modeling which can treat self-consistently a multi-scaled spatio-temporal domain, and applying it to the dynamics of structural transient phenomena in plasma. The results are as follows :
1. Analysis of self-organization process by means of two-fluid model
A two-fluid model based on nonlinear compressible Hall-MHD equations has been developed. In contrast to conventional MHD models, the formation of cross-field plasma flows which is a nature of double-Beltrami (DB) equilibria, and constraint of the process is confirmed.
2. Structure formation in tori with flows
Relaxation mechanisms in a high-beta tori with flows are studied. For the cases of numerical equilibria based on the modified Grad-Shafranov equation, the spontaneous formation of poloidal flows in a translation process of a field-reversed configuration, and a diamagnetic rotation, the pressure-driven instabilities are analyzed. Selective stabilization due to flows are clarified. The development of pressure-driven instabilities in the large helical device (LHD) plasma has shown the suppression effect due to the spontaneous toroidal flows and the compressibility.
3. Edge-localized mode (ELM) in spherical tokamak (ST)
Abovementioned models are applied to ELM in ST. The formation of filaments on ELMs are well reproduced. The soundness of the model is confirmed against the diamagnetic effect.
4. Formation of multi-layered structure by means of adaptive mesh refinement (AMR) method
A numerical code with a high-resolution compact difference method has been modified to include the AMR method. The effectiveness of the code towards the MHD simulations is confirmed.

  • Research Products

    (18 results)

All 2007 2006 2005 2004 2003

All Journal Article (18 results)

  • [Journal Article] Nonlinear Evolution of MHD Instability in LHD2007

    • Author(s)
      H.Miura
    • Journal Title

      Fusion Science and Technology 51

      Pages: 8

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Vortical, Toroidal and Compressible Motions in 3D MHD Simulations of MHD2006

    • Author(s)
      H.Miura
    • Journal Title

      J. Plasma Physics 72

      Pages: 1095

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 小特集 Edge Localized Mode (ELM)研究の最近の成果5 MHD解析から見たELM2006

    • Author(s)
      水口直紀
    • Journal Title

      J. Plasma Fusion Res. 82

      Pages: 590

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Simulation of edge-localized modes in a spherical tokamak : effects of ion diamagnetic drift2006

    • Author(s)
      R.Khan
    • Journal Title

      J. Plasma Physics 72

      Pages: 883

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Direct Numerical Simulation of Nonlinear Evolution of MHD Instability in LHD2006

    • Author(s)
      H.Miura
    • Journal Title

      Theory of Fusion Plasmas, AIP Conference Proceedings 871

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Toroidal and Compressible Motions in 3D MHD Simulations of MHD2006

    • Author(s)
      H.Miura, Vortical
    • Journal Title

      J. Plasma Physics 72

      Pages: 1095

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Simulation of edge-localized modes in a spherical tokamak : effects of ion diamagnetic drift2006

    • Author(s)
      R.han
    • Journal Title

      J. Plasma Physics 72

      Pages: 883

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 球状トカマクにおけるELMの非線形シミュレーション2005

    • Author(s)
      リアズ ハーン
    • Journal Title

      電気学会研究会資料 PST-05-65

      Pages: 59

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Nionlinear Simulation of Edge-Localized Mode in Spherical Tokamak2005

    • Author(s)
      N.Mizuguchi
    • Journal Title

      IEEJ Trans. FM 125, 11

      Pages: 934

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Nonlinear Simulation of Edge-Localized Mode in Spherical Tokamak2005

    • Author(s)
      N.Mizuguchi
    • Journal Title

      IEEJ Trans. FM 125

      Pages: 934

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Low m/n modes behavior of MHD plasma in LHD2004

    • Author(s)
      H.Miura
    • Journal Title

      J. Plasma Fusion Res. SERIES 6

      Pages: 349

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 小特集 球状トカマクの実用炉への展望 2.2 緩和現象・安定性は問題か?2004

    • Author(s)
      水口直紀
    • Journal Title

      J. Plasma Fusion Res. 80

      Pages: 924

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Nonlinear three-dimensional simulation for self-organization and flow generation in two-fluid plasmas2004

    • Author(s)
      R.Numata
    • Journal Title

      Compt. Phys. Commun. 164

      Pages: 291

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Two-fluid nonlinear simulation of self-organization of plasmas with flows2004

    • Author(s)
      Numata R.
    • Journal Title

      J.Plasma Fusion Res. SERIES 6

      Pages: 130

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] MHD Equilibrium and Stability of Spherical Tokamak Plasma with Current Hole2004

    • Author(s)
      N.Mizuguchi
    • Journal Title

      J.Plasma Fusion Res. SERIES 6

      Pages: 362

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Two-fluid nonlinear simulation of self-organization of plasmas with flows2004

    • Author(s)
      Numata R.
    • Journal Title

      J.Plasma Fusion Res. SERIES. 6

      Pages: 130

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] MHD Equilibrium and Stability of Spherical Tokamak Plasma with Current Hole2004

    • Author(s)
      N.Mizuguchi
    • Journal Title

      J.Plasma Fusion Res. SERIES. 6

      Pages: 362

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] STでのMHD不安定性2003

    • Author(s)
      水口直紀
    • Journal Title

      電気学会研究会資料 PST-03-42

      Pages: 27

    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2008-05-27  

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