論文

査読有り
2011年

A numerical method for parallel particle motions in gyrokinetic Vlasov simulations

Plasma and Fusion Research
  • Shinya Maeyama
  • ,
  • Akihiro Ishizawa
  • ,
  • Tomo-Hiko Watanabe
  • ,
  • Noriyoshi Nakajima
  • ,
  • Shunji Tsuji-Iio
  • ,
  • Hiroaki Tsutsui

6
1
開始ページ
2401028
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1585/pfr.6.2401028

A semi-Lagrangian scheme is applied for the first time to computations of charged particle motions along magnetic field lines, to numerically solve the df gyrokinetic equations in a flux tube geometry. This new solver adopted in the gyrokinetic Vlasov simulations has an advantage over the conventional Eulerian codes in calculating the parallel dynamics, because semi-Lagrangian schemes are free of the Courant-Friedrichs-Lewy (CFL) condition that restricts the time step size. A study of the accuracy of the parallel motion simulations reveals that numerical errors mainly stem from spatial (not temporal) discretization for realistic values of the grid spacing and time step, and it demonstrates the advantage of the semi-Lagrangian scheme. This novel numerical method is successfully applied to linear gyrokinetic simulations of the ion temperature gradient instability, where time steps larger than those restricted by the CFL condition can be employed. © 2011 The Japan Society of Plasma Science and Nuclear Fusion Research.

リンク情報
DOI
https://doi.org/10.1585/pfr.6.2401028
URL
http://www.jspf.or.jp/PFR/PFR_articles/pfr2011S1/pfr2011_06-2401028.html
ID情報
  • DOI : 10.1585/pfr.6.2401028
  • ISSN : 1880-6821
  • SCOPUS ID : 84861138487

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