Expansion of a Rarefield Gas Cloud into a Vacuum
Expansion of a Rarefield Gas Cloud into a Vacuum
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DOI：
10.1063/1.1706042
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发表时间：
1960-05
影响因子：
4.6
通讯作者：
P. Molmud
中科院分区：
文献类型：
--
作者：
P. Molmud
得到了描述具有简单初始构型的气云扩展到真空中的解析解。最初采用的假设是自由分子流和局部麦克斯韦速度分布。通过简单的时间变换，证明了这些解与瞬变热流中某些基本问题的解是等价的。用两种方法求解初始均匀的球形气云在真空中的膨胀：(1)基于自由分子流的假设；(2)通过编程求解传统的气体动力学方程。观察到两种处理产生的溶液之间有很好的一致性。
Analytical solutions are obtained describing the expansion into a vacuum of gas clouds having simple initial configurations. The assumptions employed are free molecular flow and local Maxwellian distribution of velocities initially. By means of a simple transformation in time, equivalence is shown between these solutions and the solutions of some elementary problems in transient heat flow. The initially uniform spherical gas cloud expanding into a vacuum is solved by two methods: (1) by the assumption of free molecular flow; and (2) by programming the conventional equations of gas dynamics. Good agreement is observed between the solutions resulting from the two treatments.