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 and k-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.
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© 1994 Springer Science+Business Media Dordrecht
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Vreman, A.W., Geurts, B.J., Kuerten, J.G.M. (1994). Subgrid-modelling in LES of Compressible Flow. In: Voke, P.R., Kleiser, L., Chollet, JP. (eds) Direct and Large-Eddy Simulation I. Fluid Mechanics and Its Applications, vol 26. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1000-6_12
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DOI: https://doi.org/10.1007/978-94-011-1000-6_12
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