Discontinuity of the velocity distribution function in a rarefied gas around a convex body and the S layer at the bottom of the Knudsen layer
Discontinuity of the velocity distribution function in a rarefied gas around a convex body and the S layer at the bottom of the Knudsen layer
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DOI：
10.1080/00411459208203796
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发表时间：
1992-08
影响因子：
--
通讯作者：
Y. Sone;S. Takata
中科院分区：
文献类型：
--
作者：
Y. Sone;S. Takata
本文讨论了稀薄气体绕凸体稳定流动中速度分布函数的不连续性，并给出了柱状凝结相蒸发流动、绕球慢速均匀流动和有温度梯度气体绕球诱导流动的算例。在凹形体周围的气体中，同样类型的不连续是不存在的。克努森层底部的S层(Y.Sone，Phys.流体(16,1422(1973))被归因于这种不连续性，并讨论了它对Knudsen层和滑移边界条件的影响，并给出了数值例子。
Abstract Discontinuity of the velocity distribution function in steady flows of a rarefied gas around a convex body is discussed, and its examples in an evaporating flow from a cylindrical condensed phase, in a slow uniform flow past a sphere, and in a flow induced around a sphere in a gas with a temperature gradient are presented. The same type of discontinuity is shown to be absent in a gas around a concave body. The S layer in the bottom of the Knudsen layer (Y. Sone, Phys. Fluids 16, 1422 (1973)) is attributed to this discontinuity, and its influence on the Knudsen layer and the slip boundary condition is discussed, with a numerical example.