論文

査読有り
2020年8月

Self-organization of zonal flows and isotropic eddies in toroidal electron temperature gradient driven turbulence

Physics of Plasmas
  • C. Kawai
  • ,
  • Y. Idomura
  • ,
  • Y. Ogawa
  • ,
  • H. Yamada

27
8
開始ページ
082302
終了ページ
082302
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1063/5.0015565
出版者・発行元
{AIP} Publishing

Self-organization in the toroidal electron temperature gradient driven (ETG) turbulence is investigated based on a global gyrokinetic model in a weak magnetic shear configuration. Because of global profile effects, toroidal ETG modes with a higher toroidal mode number n are excited at the outer magnetic surfaces, leading to strong linear wave dispersion. The resulting anisotropic wave turbulence boundary and the inverse energy cascade generate the self-organization of zonal flows, which is the unique mechanism in the global gyrokinetic model. The self-organization is confirmed both in the decaying turbulence initialized by random noises and in the toroidal ETG turbulence. It is also shown that the self-organization process generates zonal flows and isotropic eddies depending on a criterion parameter, which is determined by the ion to electron temperature ratio and the turbulence intensity.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1063/5.0015565
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000560776400001&DestApp=WOS_CPL
ID情報
  • DOI : 10.1063/5.0015565
  • ISSN : 1089-7674
  • eISSN : 1089-7674
  • ORCIDのPut Code : 82570377
  • Web of Science ID : WOS:000560776400001

エクスポート
BibTeX RIS