Applied Scientific Research

, Volume 54, Issue 3, pp 191–203

Subgrid-modelling in LES of compressible flow

  • Bert Vreman
  • Bernard Geurts
  • Hans Kuerten
Article

DOI: 10.1007/BF00849116

Cite this article as:
Vreman, B., Geurts, B. & Kuerten, H. Appl. Sci. Res. (1995) 54: 191. doi:10.1007/BF00849116

Abstract

Subgrid-models for Large Eddy Simulation (LES) of compressible turbulent flow are tested for the three-dimensional mixing layer. For the turbulent stress tensor the recently developed dynamic mixed model yields reasonable results.A priori estimates of the subgrid-terms in the filtered energy equation show that the usually neglected pressure-dilatation and turbulent dissipation rate are as large as the commonly retained pressure-velocity subgrid-term. Models for all these terms are proposed: a similarity model for the pressure-dilatation, similarity andk-dependent models for the turbulent dissipation rate and a dynamic mixed model for the pressure-velocity subgrid-term. Actual LES demonstrates that for a low Mach number all subgrid-terms in the energy equation can be neglected, while for a moderate Mach number the effect of the modelled turbulent dissipation rate is larger than the combined effect of the other modelled subgrid-terms in the filtered energy equation.

Key words

large eddy simulation compressible mixing layer 

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • Bert Vreman
    • 1
  • Bernard Geurts
    • 1
  • Hans Kuerten
    • 1
  1. 1.Department of Applied MathematicsUniversity of TwenteEnschedeThe Netherlands