Abstract
Rarefied gas flow through a rough channel of finite length into a vacuum was investigated using the direct simulation Monte Carlo method. The non-equilibrium effects at the input and output of the channel were considered by including certain pre-and post-channel regions into the geometry under consideration. The mass flow rate through a short and long channel was computed in a wide range of gas rarefaction from the free molecular regime to the hydrodynamic near. It is shown that the noticeable effect of surface roughness on flow rate is manifested in the free molecular and transition regimes. The analysis is provided for the flow field inside the channel as well as in the upstream and downstream regions. The results obtained are consistent with the theoretical, numerical, and experimental data available in the open literature.
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20 April 2020
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The support by the Ministry of Education and Science of the Russian Federation through the State task for high educational institutions (the research project # FEUZ-2020-0057) is gratefully acknowledged.
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Sazhin, O. Rarefied gas flow through a rough channel into a vacuum. Microfluid Nanofluid 24, 27 (2020). https://doi.org/10.1007/s10404-020-2330-y
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DOI: https://doi.org/10.1007/s10404-020-2330-y