A slip model for rarefied gas flows at arbitrary Knudsen number

被引：244
|
作者：
Wu, Lin [1 ]
机构：
[1] Univ Nebraska, Dept Mech Engn, Lincoln, NE 68588 USA
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 25期
关键词：
boundary layers; confined flow; kinetic theory; Knudsen flow; lubrication; slip flow;
D O I：
10.1063/1.3052923
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A slip model for wall bounded rarefied gas flows is derived from kinetic theory. A corresponding modified Reynolds lubrication equation is obtained from the slip velocity boundary conditions at walls for high Knudsen number gas flows. The slip model in a simplest form has predictions very close to the numerical solutions of linearized Boltzmann equation in the whole Knudsen number range, and is preferable to the widely applied 1st order (Maxwell slip model), 2nd order, and 1.5 order slip models.
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页数：3
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