MAGNETOHYDRODYNAMIC INSTABILITIES IN DEVELOPED SMALL-SCALE TURBULENCE

被引：24

作者：

KLEEORIN, N ^{[1
]}

MOND, M ^{[1
]}

ROGACHEVSKII, I ^{[1
]}

机构：

[1] HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL

来源：

PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1993年 / 5卷 / 11期

关键词：

D O I：

10.1063/1.860582

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：

Modification of the magnetic force by a developed small-scale magnetohydrodynamic (MHD) turbulence can result in the sip reversal of the effective magnetic pressure. It is due to negative contribution of the MHD turbulence, to the large-scale magnetic force. It can significantly lower the elasticity of the large-scale magnetic field [ Sov. Phys. JETP 70, 878 (1990)]. This effect excites instabilities of the large-scale magnetic field due to the energy transfer from the turbulent pulsations to the latter. The nonturbulent stability criteria are modified due to the effective negative magnetic pressure. These instabilities may provide a mechanism of the large-scale magnetic ropes formation in the solar convective zone and spiral galaxies. In addition, the instabilities can excite the short-period solar oscillations.

引用

页码：4128 / 4134

页数：7

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