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Collisionless Kinetic-fluid Model of Zonal Flows in Toroidal Plasmas
http://hdl.handle.net/10655/2502
http://hdl.handle.net/10655/25026b7e003b-63d2-4e96-a04e-ae09c54b0aa0
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Collisionless Kinetic-fluid Model of Zonal Flows in Toroidal Plasmas | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | closure model | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | zonal flows | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | geodesic acoustic modes | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | ion temperature gradient modes | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | electron temperature gradient modes | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
"Sugama, H.
× "Sugama, H.× Watanabe, T.-H.× Horton, W." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "A novel kinetic-fluid model is presented, which describes collisionless time evolution of zonal flows in tokamaks. In the new zonal-flow closure relations, the parallel heat fluxes are written by the sum of short- and long-time-evolution parts. The former part is given in the dissipative form of the parallel heat diffusion and relates to collisionless damping processes. The latter is derived from the long-time-averaged gyrocenter distribution and plays a major role in describing low-frequency or stationary zonal flows, for which the parallel heat fluxes are expressed in terms of the parallel flow as well as the nonlinear-source and initial-condition terms. It is shown analytically and numerically that, when applied to the zonal flow driven by either ion or electron temperature gradient turbulence, the kinetic-fluid equations including the new closure relations can reproduce the same long-time zonal-flow responses to the initial condition and to the turbulence source as those obtained from the gyrokinetic model." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 2006-12-01 |
|||||
報告書番号 | ||||||
NIFS-870 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |