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.
Original language | English |
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Title of host publication | Direct and Large-Eddy Simulation I |
Subtitle of host publication | Selected papers from the First ERCOFTAC Workshop on Direct and Large-Eddy Simulation |
Editors | Peter R. Voke, Leonhard Kleiser, Jean-Pierre Chollet |
Place of Publication | Dordrecht |
Publisher | Kluwer Academic Publishers |
Pages | 133-144 |
Number of pages | 12 |
ISBN (Electronic) | 978-94-011-1000-6 |
ISBN (Print) | 978-94-010-4434-9 |
DOIs | |
Publication status | Published - 13 Feb 1994 |
Event | 1st ERCOFTAC Workshop on Direct and Large-Eddy Simulation I 1994 - The University of Surrey, Guildford, United Kingdom Duration: 27 Mar 1994 → 30 Mar 1994 Conference number: 1 |
Publication series
Name | Fluid Mechanics and Its Applications |
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Publisher | Kluwer Academic |
Volume | 26 |
ISSN (Print) | 0926-5112 |
Workshop
Workshop | 1st ERCOFTAC Workshop on Direct and Large-Eddy Simulation I 1994 |
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Country/Territory | United Kingdom |
City | Guildford |
Period | 27/03/94 → 30/03/94 |
Keywords
- Mach number
- Large eddy simulation
- Compressible flow
- Turbulent stress
- Turbulent dissipation rate