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A turbulence model with variable coefficients for calculating mixing layers and jets

Abstract

Currently available turbulence models for calculating mixing layers and jets are considered. The reasons for inadequate modeling of initial jet regions are analyzed. The problem of the sensitivity of certain turbulence models to the freestream value of ω is studied. The necessity of introducing variable turbulent-transport coefficients and a correction for axial symmetry is shown. A differential model with variable coefficients for the Reynolds stresses is proposed which makes it possible to obtain adequate solutions in the self-similar regions of mixing layers and jets.

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Original Russian Text © A.I. Troshin, 2012, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2012, Vol. 47, No. 3, pp. 39–48.

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Troshin, A.I. A turbulence model with variable coefficients for calculating mixing layers and jets. Fluid Dyn 47, 320–328 (2012). https://doi.org/10.1134/S0015462812030052

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  • DOI: https://doi.org/10.1134/S0015462812030052

Keywords

  • turbulence models
  • mixing layers
  • jets