STRUCTURE FORMATION AND TRANSPORT IN DISSIPATIVE DRIFT-WAVE TURBULENCE

被引：59

作者：

KONIGES, AE ^{[1
]}

CROTINGER, JA ^{[1
]}

DIAMOND, PH ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

来源：

PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1992年 / 4卷 / 09期

关键词：

D O I：

10.1063/1.860151

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：

Numerical flow simulations are used to study the effect of coherent structures on transport in the context of a two-field, two-dimensional model of dissipative drift-wave turbulence. The presence and nature of structures are found to depend on the adiabaticity parameter alpha = k(parallel-to)2 V(T)2/2-nu(ei)omega(s) which controls the degree to which the electrons respond to parallel electric fields. Transport estimates based on quasilinear and mixing-length models are compared with the simulations. In the regime with long-lived coherent structures, the turbulent particle transport predicted by a standard quasilinear or mean-field estimate is found to exceed that actually observed in the presence of coherent structures.

引用

页码：2785 / 2793

页数：9

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