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Abstract <p>Using the example of the problem of a rarefied gas flow around an inclined plate with M&#xa0;=&#xa0;20, the issues of correctly taking into account the effects that arise during the flow of rarefied gas, in particular, second (bulk) viscosity effects, are considered. A brief overview of the current state of studies of second viscosity of gases is given. The results of calculations using the Navier–Stokes equations and quasi-gasdynamic equations are presented and analyzed. A conclusion is made about the significant influence of second viscosity on the results of rarefied gas flow simulations, regardless of the system of dynamics equations utilized.</p>

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On the Role of Second Viscosity in Rarefied Gas Dynamics

  • 期刊论文

  • 发表日期：

    2025年2月28日

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  • D. S. Yanyshev,
  • I. A. Shirokov,
  • M. A. Kiryushina,
  • A. M. Molchanov,
  • L. V. Bykov

摘要

Abstract

Using the example of the problem of a rarefied gas flow around an inclined plate with M = 20, the issues of correctly taking into account the effects that arise during the flow of rarefied gas, in particular, second (bulk) viscosity effects, are considered. A brief overview of the current state of studies of second viscosity of gases is given. The results of calculations using the Navier–Stokes equations and quasi-gasdynamic equations are presented and analyzed. A conclusion is made about the significant influence of second viscosity on the results of rarefied gas flow simulations, regardless of the system of dynamics equations utilized.