Relaxation of a Two-Specie Magnetofluid
Relaxation of a Two-Specie Magnetofluid
复制标题
两种磁流体的弛豫
DOI：
10.1103/physrevlett.79.3423
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发表时间：
1997
影响因子：
8.6
通讯作者：
A. Ishida
中科院分区：
文献类型：
--
作者：
L. Steinhauer;A. Ishida
对于多物种磁流体，发展了理想磁流体的驰豫理论。它的不变量是自我无助性，每个物种一个。它们在理想情况下的{OPEN_QUOTES}局域{CLOSE_QUOTES}不变性来自螺旋度输运方程。研究了双流体(离子和电子)自旋度的整体形式，并用级联衰变和选择性衰变论证了它们在弱耗散系统中的坚固性。一般而言，双流体理论预测了具有有限压力和剪切流动的松弛状态。人们熟悉的单流体松弛理论只允许无力状态，它是目前更一般理论的简化情况。{版权所有}{ITAL 1997}{ITAL The American Physitive Society}
The relaxation theory of an ideal magnetofluid is developed for a multispecie magnetofluid. Its invariants are the self-helicities, one for each specie. Their {open_quotes}local{close_quotes} invariance in the ideal case follows from the helicity transport equation. The global forms of the self-helicities are investigated for a two-fluid (ion and electron), and their ruggedness in a weakly dissipative system is defended by cascade and selective decay arguments. In general the two-fluid theory predicts relaxed states with finite pressure and sheared flows. The familiar single-fluid relaxation theory, which admits only force-free states, is a reduced case of the present more general theory. {copyright} {ital 1997} {ital The American Physical Society}