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Direct simulation Monte Carlo calculations of rarefied flows with incomplete surface accommodation

Published online by Cambridge University Press:  26 April 2006

R. G. Lord
R. G. Lord
Affiliation:
Oxford University, Department of Engineering Science, Parks Road, Oxford, UK
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Abstract

Effects of incomplete surface accommodation in rarefied gas flows have been studied using the direct simulation Monte Carlo (DSMC) method in conjunction with the Cercignani–Lampis gas–surface interaction model. Two different flows have been studied, both of which have previously been simulated in DSMC calculations for the case of complete surface accommodation. These are (a) the flow over a sharp, slender circular cone at Mach 5.1 and (b) the flow over a flat-faced circular cylinder at Mach 25. In each case, the gas simulated was nitrogen. It was found that in case (a) the accommodation coefficient of the kinetic energy due to the tangential component of velocity has the greatest influence, whereas in case (b) that of the normal component is also important, having a drastic effect on the rarefied flow field.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 239 , June 1992 , pp. 449 - 459
Copyright
© 1992 Cambridge University Press

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