• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study of Similarity Low with Non-dimensional Numbers for Turbulent Transport

Research Project

Project/Area Number 08680503
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

WAKATANI Masahiro  Kyoto University, Graduate School of Energy Science, Professor, エネルギー科学研究科, 教授 (00109357)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Yuji  Kyoto University, Graduate School of Energy Science, Associate Professor, エネルギー科学研究科, 助教授 (20198245)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1997: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1996: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordsinterchange mode / Rayleigh number / Prandtl number / Nusselt number / H mode / ELMs / 非線形インターチェンジモード / トカマク / ステラレータ / ELM / レイノルズ応力
Research Abstract

As a model for turbulent transport in inhomogeneous plasmas the interchange turbulence was studied. This instability is universal for magnetically confined plasma, and has similarity to Rayleigh-Taylor instability and Benard convection. It is possible to refer knowledge obtained for these instabilities within the fluid dynamics. The magnetohydrodynamic model for describing the interchange turbulence includes two non-dimensional characteristic numbers, Rayleigh number, Ra, and Prandtl number, Pr. These non-dimensional numbers are also used for classifying the Benard convection. For evaluating The transport due to the interchange turbulence, the non-dimensional number, Nusselt number, Nu, was employed. In this study the Prandtl number is usually assumed Pr=1. The obtained results are summarized in the following.
1.For Ra <greater than or similar> 10^4, the saturation level of interchange turbulence becomes non-stationary and show a sawtooth-like oscillation. 2.For Ra <greater than or similar> 10^5, the shear flow componet exceeds the vortex componet driven by the interchange mode with the enhancement of the sawtooth-like oscillation of total fluctuation energy. 3.For Ra <greater than or similar> 10^5, the Nusselt number corresponding to the turbulent transport increases intermittently. With the increase of Ra, Nu at the burst becomes large and the period of burst becomes long. However, the time average of Nu does not depend on Ra. 4.The behavior of the nonlinear interchange mode seems consistent with the ELMs (Edge Localized Modes) observed in the H-mode of tokamak or ste

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] A.Takayama: "Suppression of nonlinear interchange mode by zonal counters treaming flow" Phys.plasmas. 3. 3-5 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama: "ELM modelling based on the nonlinear interchange mode in edge plasma" Plasma Phys.Control Fnsion. 38. 1411-1414 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama: "Generetion of sheared Flow and its Effect on Transport Based on Nonlinear Interchange Mode" J.Korean Phys.Soc.31. S167-S170 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Idomura: "chaotic beharior in PIC simulation and its relation to computational errors" Comp.Phys.Communications. 102. 68-80 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Wakatani: "Transport in High Performance Plasmas with a Transport Barrier" Plasma Phys.Control.Fnsion. 40. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama: "Comparison between Loreng type and fluid models for nonlinear interchange mode generating shear flow" Plasma Phys.Control.Fnsion. 40. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] R.L.Dewar: "TWO-DIMENSIONAL TURBULENCE IN PLASMAS AND FLUIDS" American Institute of Physics, 303 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama et al: "Suppression of nonlinear interchange mode by zonal counterstreaming flow" Phys.Plasmas. 3. 3-5 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama and M.wakatani: "ELM modelling based on the nonlinear interchange mode in edge plasma" Plasma Phys.Control.Fusion. 38. 1411-1414 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama and M.wakatani: "Generation of sheared Flow and its Effect on Transport Based on Nonlinear Interchange Mode" J.Korean Phys.Soc. 31. S167-S170 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.Idomura et al: "Chaotic behavior in PIC simulation and its relation to computational errors" Comp.Phys.Communications. 102. 68-80 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Wakatani: "Transport in High Performance Plasmas with a Transport Barrier (to be published)" Plasmas Phy. Control. Fusion. 40. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama et al: "Comparison between Lorenz type and fluid models for nonlinear interchange mode generating shear flow (to be published)" Plasma Phys.Control Fusion. 40. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takayama: "Suppression of nonlinear interchange mode by zonal counters treaming flow" Phys.Plasmas. 3. 3-5 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Takayama: "ELM modelling based on the nonlinear interchange mode in edge plasma" Plasma Phys.Control.Fusion. 38. 1411-1414 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Takayama: "Generation of Sheared Flow and its Effect on Transport" J.Korean Phys.Soc.31. S167-S170 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Idomura: "Chaotic behavior in PIC simulation and its relation to computational errors" Comp.Phys.Communications. 102. 68-80 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Wakatani: "Transport in High Performance Plasmas with a Transport Barrier" Plasma Phys.Control.Fusion. 40. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Takayama: "Comparison between Lorenz type and fluid models" Plasma Phys.Control.Fusion. 40. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] R.L.Dewar: "TWO-DIMENSIONAL TURBULENCE IN PLASMAS AND FLUIDS" American Institute of Physics, 303 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Takayama: "Suppression of nonlinear interchange mode by zonal counterstreaming flow generation" Phys.Plasmas. 3. 3-5 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] A.Takayama: "ELM mode lling based on the nonlinear interchange mode in edge plasma" Plasma Phys.Control.Fusion. 38. 1411-1414 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Ishii: "Averaged Stellarator Equilibrium with Poloidal Flow" J.Plasma and Fusion Research. 72. 772-775 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Nakamura: "Comparison of the Calculations of the stability Properties of a Specific Stellarator Equilibrium with Different MHD Stability Codes" J.Comp.Physics. 128. 43-57 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Wakatani: "Overview of Heliotron E results" Plasma Phys.Control.Fusion. 38. 937-988 (1996)

    • Related Report
      1996 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi