The role of coherent vorticity in turbulent transport in resistive drift-wave turbulence

被引：14

作者：

Bos, W. J. T. ^{[1
,2
,3
]}

Futatani, S. ^{[4
,5
]}

Benkadda, S. ^{[4
]}

Farge, M. ^{[6
]}

Schneider, K. ^{[1
,2
]}

机构：

[1] Univ Aix Marseille 1, M2P2 CNRS, F-13453 Marseille 13, France

[2] Univ Aix Marseille 1, CMI, F-13453 Marseille 13, France

[3] Univ Lyon 1, LMFA UMR CNRS Ecole Cent Lyon 5509, INSA Lyon, F-69134 Ecully, France

[4] Univ Aix Marseille 1, CNRS UMR 6633, France Japan Magnet Fus Lab LIA 336, F-13397 Marseille 20, France

[5] Kyoto Univ, Grad Sch Energy Sci, Kyoto, Japan

[6] Ecole Normale Super, LMD IPSL CNRS, F-75231 Paris 05, France

来源：

PHYSICS OF PLASMAS | 2008年 / 15卷 / 07期

关键词：

D O I：

10.1063/1.2956640

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：

The coherent vortex extraction method, a wavelet technique for extracting coherent vortices out of turbulent flows, is applied to simulations of resistive drift-wave turbulence in magnetized plasma (Hasegawa-Wakatani system). The aim is to retain only the essential degrees of freedom, responsible for the transport. It is shown that the radial density flux is carried by these coherent modes. In the quasi-hydrodynamic regime, coherent vortices exhibit depletion of the polarization-drift nonlinearity and vorticity strongly dominates strain, in contrast to the quasiadiabatic regime. (C) 2008 American Institute of Physics.

引用

页数：6

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