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Development of an Efficient Particle Approach for Micro-Scale Gas Flow Simulations

[+] Author Affiliations
Quanhua Sun, Feng Li, Jing Fan

Chinese Academy of Sciences, Beijing, China

Chunpei Cai

New Mexico State University, Las Cruces, NM

Paper No. MNHMT2009-18291, pp. 129-135; 7 pages
doi:10.1115/MNHMT2009-18291
From:
  • ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer
  • ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 1
  • Shanghai, China, December 18–21, 2009
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 978-0-7918-4389-5 | eISBN: 978-0-7918-3864-8
  • Copyright © 2009 by ASME

abstract

The micro-scale gas flows are usually low-speed flows and exhibit rarefied gas effects. It is challenging to simulate these flows because traditional CFD method is unable to capture the rarefied gas effects and the direct simulation Monte Carlo (DSMC) method is very inefficient for low-speed flows. In this study we combine two techniques to improve the efficiency of the DSMC method. The information preservation technique is used to reduce the statistical noise and the cell-size relaxed technique is employed to increase the effective cell size. The new cell-size relaxed IP method is found capable of simulating micro-scale gas flows as shown by the 2D lid-driven cavity flows.

Copyright © 2009 by ASME

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