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Direct stochastic simulation of a rarefied gas flow in channels of variable cross section

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Thermophysics and Aeromechanics Aims and scope

Abstract

Rarefied gas flow into a vacuum through short linearly diverging and converging channels has been examined with the direct simulation Monte Carlo method. Solution to the problem has been suggested using complete geometric setup with quite large areas on inlet and outlet of a model channel in examined geometry. A mass flow rate through the channel and flow field both inside the channel and upstream and downstream have been calculated in a wide range of gas rarefaction. These calculation results are comparable to corresponding data for the channel with constant cross section. A strong impact of channel geometry and gas rarefaction has been proved.

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Authors and Affiliations

  1. Ural Federal University, Ekaterinburg, Russia

    A. O. Sazhin & O. V. Sazhin

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  1. A. O. Sazhin
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  2. O. V. Sazhin
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Correspondence to A. O. Sazhin.

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The study was financed under the grant of the Russian Science Foundation and the Sverdlovsk Region Government No. 22-21-20121, https://rscf.ru/project/22-21-20121.

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Sazhin, A.O., Sazhin, O.V. Direct stochastic simulation of a rarefied gas flow in channels of variable cross section. Thermophys. Aeromech. 30, 1043–1049 (2023). https://doi.org/10.1134/S0869864323060070

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  • DOI: https://doi.org/10.1134/S0869864323060070

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