On the Numerical Simulation of Rarefied Gas Flows in Micro-channels

Chariton Christou; Kokou Sename Enyonam Dadzie

doi:10.1088%2F2399-6528%2Faab066

On the Numerical Simulation of Rarefied Gas Flows in Micro-channels

Chariton Christou
, Kokou Sename Enyonam Dadzie

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

133 Downloads (Pure)

Abstract

Classical continuum methods break down for rarefied gas flows in micro-channels. Two non-continuum hydrodynamic models are investigated here: compressible Korteweg fluid-like and Bi-Velocity (Volume Diffusion) hydrodynamic models. The pressure driven rarefied gas flow in a rectangular micro-channel in the whole range of Knudsen number is numerically considered. The Korteweg model shows improved results in comparison with standard Navier–Stokes up to Knudsen number of unity. The Bi-Velocity method is found to allow a match between experiments and numerical results over the full range of Knudsen number.

Original language	English
Article number	35002
Journal	Journal of Physics Communications
Volume	2
Issue number	3
DOIs	https://doi.org/10.1088%2F2399-6528%2Faab066
Publication status	Published - 1 Mar 2018

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10.1088%2F2399-6528%2Faab066Licence: CC BY

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Kokou Dadzie
- K.Dadziehw.acuk
- School of Engineering & Physical Sciences - Associate Professor
- School of Engineering & Physical Sciences, Institute of Mechanical, Process & Energy Engineering - Associate Professor
Person: Academic (Research & Teaching)

Cite this

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abstract = "Classical continuum methods break down for rarefied gas flows in micro-channels. Two non-continuum hydrodynamic models are investigated here: compressible Korteweg fluid-like and Bi-Velocity (Volume Diffusion) hydrodynamic models. The pressure driven rarefied gas flow in a rectangular micro-channel in the whole range of Knudsen number is numerically considered. The Korteweg model shows improved results in comparison with standard Navier–Stokes up to Knudsen number of unity. The Bi-Velocity method is found to allow a match between experiments and numerical results over the full range of Knudsen number.",

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On the Numerical Simulation of Rarefied Gas Flows in Micro-channels

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