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Prediction of Gas Flow Through Rough Microchannels Using a Lattice Boltzmann Method

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Abstract:

In this paper, a lattice Boltzmann method is used to study gas flow through rough microchannels. The main objective is to investigate the effects of surface roughness on characteristics of gas flow through two-dimensional microchannels. Randomized rough boundary condition is used to simulate the gas-surface interaction directly for rough walls. By using this method there is no need to utilize any additional correction factor to model the fluid flow near the rough surface. Gas flow through two microchannels were computed and compared with the experimental and numerical data. As expected rough surface decreases the mass flow and slip velocity compare to the smooth surface. However, for rough channels, increase in surface roughness height decreases the mass flow but increases the slip velocity.

Keywords: LATTICE BOLTZMANN METHOD; MICROCHANNEL; ROUGHNESS

Document Type: Research Article

DOI: https://doi.org/10.1166/asl.2011.1857

Publication date: 2011-11-01

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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