Are the energy and magnetic potential cascades direct or inverse in 2D MHD turbulence?

被引：6

作者：

Kim, EJ ^{[1
]}

Dubrulle, B

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Natl Ctr Atmospher Res, Boulder, CO 80307 USA

[3] Observ Midi Pyrenees, CNRS, UMR 5572, F-31400 Toulouse, France

来源：

PHYSICA D-NONLINEAR PHENOMENA | 2002年 / 165卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

magneto hydrodynamics; stochastic processes and statistics; nonlinear dynamics;

D O I：

10.1016/S0167-2789(02)00425-6

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

Transfer of energy and magnetic potential is studied in 2D MHD turbulence in the presence of a background shear flow and magnetic field. The energy is injected into both fluid and magnetic field by external forcing. By using a two-scale analysis and the Gabor transform, the direction of the cascade of energy and magnetic vector potential is found to depend on the properties of forcings. In particular, in the case of a magnetic forcing that is isotropic, the magnetic vector potential cascades from small to large-scales whereas the energy from large to small-scales. (C) 2002 Elsevier Science B.V. All lights reserved.

引用

页码：213 / 227

页数：15

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