INTERCHANGE INSTABILITY TURBULENCE MODEL IN EDGE TOKAMAK PLASMA

被引：25
|
作者：
BENKADDA, S [1 ]
GARBET, X [1 ]
VERGA, A [1 ]
机构：
[1] CTR ETUD CADARACHE,DRFC SPPF,F-13108 ST PAUL DURANCE,FRANCE
来源：
CONTRIBUTIONS TO PLASMA PHYSICS | 1994年 / 34卷 / 2-3期
关键词：
D O I：
10.1002/ctpp.2150340224
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Interchange instability is investigated as a plausible mechanism to drive turbulence in the tokamak scrape-off-layer. By averaging density and electrostatic potential fluid equations along field lines, a reduced two dimensional model is obtained. Similarly to Rayleigh-Benard convection, interchange instability shows a instability threshold and presents localised modes (with a simple geometry and boundary conditions). The nonlinear, turbulent, behaviour of the model is investigated using numerical simulations. Preliminary results show a self-organization of the flow in coherent structures with a departure from gaussian statistics.
引用
收藏
页码：247 / 252
页数：6
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