Nonuniqueness of two-temperature Guldberg-Waage and Saha equations: Influence on thermophysical properties of SF6 plasmas
Nonuniqueness of two-temperature Guldberg-Waage and Saha equations: Influence on thermophysical properties of SF6 plasmas
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DOI：
10.1063/1.4829035
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发表时间：
2013-11
影响因子：
2.2
通讯作者：
Weizong Wang;M. Rong;J. W. Spencer
中科院分区：
文献类型：
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作者：
Weizong Wang;M. Rong;J. W. Spencer
本文着重研究了在热平衡和非平衡条件下，Guldberg-Waage方程和Saha方程的选取对SF6等离子体热力学性质和输运系数的影响。使用文献中出现的两种典型形式的双温度Saha方程和Guldberg-Waage方程对物种组成进行了数值确定。文中还讨论了激发温度的选择对等离子体成分以及热力学性质和输运系数的重要影响。输运系数的计算采用最近的碰撞相互作用势，采用Devoto的电子和重粒子去耦合方法，但在Chapman-Enskog方法的框架下扩展到三阶近似(粘性的二阶)。此外，还分析了不同定义的德拜长度对属性值的影响。并对不同速度下的结果进行了计算。
This paper focuses to study how the choice of Guldberg-Waage and Saha equations affects the thermodynamic properties and transport coefficients of SF6 plasmas under both thermal equilibrium and non-equilibrium conditions. The species composition is numerically determined using two typical forms of two-temperature Saha equations and Guldberg-Waage equations that have appeared in the literature. The great influence of the choice of the excitation temperature on the plasma composition and hence the thermodynamic properties and transport coefficients is discussed as well. Transport coefficients are calculated with most recent collision interaction potentials by adopting Devoto's electron and heavy particle decoupling approach but expanded to the third-order approximation (second-order for viscosity) within the framework of Chapman-Enskog method. Furthermore, an analysis of the effect of different definitions of Debye length on the properties values was performed as well. The results are computed for various v...