Viscosity in a magnetized plasma: Physical interpretation
Viscosity in a magnetized plasma: Physical interpretation
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磁化等离子体中的粘度：物理解释
DOI：
10.1029/ja090ia08p07620
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发表时间：
1985
影响因子：
--
通讯作者：
J. V. Hollweg
中科院分区：
文献类型：
--
作者：
J. V. Hollweg
我们提供了Braginskii（1965）等人给出的粘性应力张量中η0项的物理动机替代推导。我们表明，η0项完全由一个旋向性对角压力张量来解释，非对角项对粘性应力的η0部分没有贡献。粘滞应力的η0部分是由于等离子体在其发展过程中倾向于发展小的热各向异性。碰撞对抗各向异性的产生，并最终导致不可逆的加热。
We provide a physically motivated alternate derivation of the η0 terms in the viscous stress tensor given by Braginskii (1965) and others. We show that the η0 terms are fully accounted for by a gyrotropic diagonal pressure tensor; off-diagonal terms do not contribute to the η0 part of the viscous stress. The η0 part of the viscous stress results from the plasma's tendency to develop small thermal anisotropies as it evolves. Collisions oppose the production of anisotropy and ultimately lead to irreversible heating.