MECHANISM OF ENERGY TRANSFORMATIONS IN SHEAR MAGNETOHYDRODYNAMIC FLOWS

被引：44

作者：

CHAGELISHVILI, GD ^{[1
]}

HRISTOV, TS ^{[1
]}

CHANISHVILI, RG ^{[1
]}

LOMINADZE, JG ^{[1
]}

机构：

[1] SPACE RES INST, BU-1000 SOFIA, BULGARIA

来源：

PHYSICAL REVIEW E | 1993年 / 47卷 / 01期

关键词：

D O I：

10.1103/PhysRevE.47.366

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：

Evolution of slow magnetoacoustic perturbations is used to demonstrate a new mechanism of plane Couette flow shear energy transformation. The initial uniform magnetic field is considered to be directed along the unperturbed flow velocity. We find that the amplification of waves is nonordinary-it occurs in a limited time interval and is anomalously strong. The unusual behavior is manifested also by the fact that the characteristic length scale of perturbation diminishes down to the dissipative scales not only due to nonlinear cascade processes, but due to a linear drift in the k space as well.

引用

页码：366 / 374

页数：9