以离子与电子的双流体模型以及麦克斯韦方程为基础，推导得到了真空电弧的二维磁流体动力学(MHD)模型。
Based on two-fluid model of ion and electron and Maxwell equation, the two-dimensional magnetohydrodynamic (MHD) model of vacuum arc was obtained.
把星云的复杂的磁流体动力学方程，近似简化为只与速度相关的方程，则得到一个可解的简单模型。
The theory is based on the complex hydromagnetic equations of nebula, which are simplified approximately to the equations of velocity.
本文利用MHD波与日冕大气耦合的磁流体动力学方程组，计算得到冕洞内的日冕大气的温度T、密度N和流速V的分布。
The distributions of. temperature T, density N and velocity V are given using the equations coupling the MHD waves with the coronal atmosphere.
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