Fluid simulations of turbulent impurity transport

被引:56
作者
Dubuit, N. [1 ]
Garbet, X. [1 ]
Parisot, T. [1 ]
Guirlet, R. [1 ]
Bourdelle, C. [1 ]
机构
[1] Ctr Cadarache, EURATOM Assoc, CEA, DSM,DRFC, F-13108 St Paul Les Durance, France
关键词
D O I
10.1063/1.2710461
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
Impurity transport in tokamak plasmas is studied with a fluid turbulence code, which has been upgraded to implement two ion species and electrons. The (fixed-flux) simulations are compared to the predictions of a quasilinear model. These simulations mostly agree with quasilinear estimates; they indicate that a turbulent impurity pinch exists. Moreover, this pinch is found to be dominated by curvature terms, as thermodiffusion pinches are found to decrease as 1/Z and observed parallel velocity effects remain weak. The sign of the pinch is also investigated. (c) 2007 American Institute of Physics.
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页数:8
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