Journal
VACUUM
Volume 85, Issue 2, Pages 115-119Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2010.04.011
Keywords
DSMC; ES-BGK; Radiometric; Low-speed flow
Funding
- Propulsion Directorate of the Air Force Research Laboratory at Edwards Air Force Base California
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Modeling of low-speed gas flows at moderate Knudsen numbers, where conventional continuum CFD methods are inapplicable and kinetic methods are either inaccurate of prohibitively expensive, presents a significant challenge for computational modeling. In this work, an approach that combines a finite-volume solution of the ES-BGK model kinetic equation and the statistical DSMC method to accurately predict radiometric forces on a vane in large vacuum chamber filled with rarefied gas is presented. The approach in effect combines the accuracy of a statistical solution of the Boltzmann equation with the numerical efficiency of a deterministic solution of simplified model kinetic equations. (C) 2010 Elsevier Ltd. All rights reserved.
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