Transient flow of rarefied gas through a short tube

被引：34
作者：
Sharipov, Felix [1 ]
机构：
[1] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana, Brazil
来源：
VACUUM | 2013年 / 90卷
关键词：
Transient flows; Rarefied gas; Flow rate; DSMC; NUMERICAL-SIMULATION; RAREFACTION; EQUATION; RANGE;
D O I：
10.1016/j.vacuum.2012.09.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A transient rarefied gas flow through a short tube is studied on the basis of the direct simulation Monte Carlo method. The mass flow rates through both inlet and outlet cross sections are calculated as a function of the time in the free-molecular, transitional and hydrodynamic regimes with respect to the gas rarefaction. Two values of the pressure ratio, i.e. 0.1 and 0.5, and two values of the aspect ratio, i.e. 1 and 5, are considered. A characteristic time equal to that needed to cross the tube radius with the most probable molecular speed is defined. A typical interval of time to establish the steady flow rates was calculated. It was found that this time is about ten and forty characteristic times for the shorter and longer tubes, respectively. The flow field for the longer tube is analyzed in details. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：25 / 30
页数：6
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