Time and space scales of electrical and gasdynamic non-uniformities in a non-equilibrium MHD plasma
Time and space scales of electrical and gasdynamic non-uniformities in a non-equilibrium MHD plasma
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非平衡 MHD 等离子体中电和气动力学不均匀性的时间和空间尺度
DOI：
10.1017/s0022377800018365
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发表时间：
1995
影响因子：
2.5
通讯作者：
V. M. Zubstov
中科院分区：
文献类型：
--
作者：
A. Sokolov;S. Kabashima;V. M. Zubstov
本文研究了MHD方程的Saha平衡近似和温度弛豫近似，分析了非平衡MHD等离子体中非线性电离非均匀性的形成和演化。典型的等离子体参数下的特征弛豫时间的分析进行验证这些近似。电子热导率和辐射的特征空间尺度进行了评估。这些空间尺度决定了非线性电离波前的特征宽度，对数值模拟的应用具有重要意义。
The Saha equilibrium approximation and the temperature relaxation approximation to the MHD equations are investigated with regard to the analysis of the formation of nonlinear ionization non-uniformities and their evolution in a non- equilibrium MHD plasma. An analysis of characteristic relaxation times under typical plasma parameters is carried out to verify these approximations. Characteristic space scales of electron thermal conductivity and radiation are evaluated. These space scales determine the characteristic width of nonlinear ionization wave fronts, and are important for the application of numerical simulations.