Abstract
Subgrid-scale models based on incremental unknowns (IU) are proposed and investigated for LES of incompressible homogeneous turbulence. The aim of this approach is to derive an estimation procedure of scales (IU) smaller than the resolved ones. The IU components are solutions of an evolution equation. The SGS stress tensor is then explicitly computed. The SGS force is finally modified by phase correction procedures in order to enhance SGS dissipation. A good level of correlation between modeled and exact SGS force, as well as SGS energy transfer, is obtained. The IU models predict the right amount of SGS dissipation. A good agreement between LES results and filtered DNS is noted. In the case of decaying turbulence, IU models perform better than the dynamic model.
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© 1999 Springer Science+Business Media Dordrecht
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Bouchon, F., Dubois, T. (1999). Incremental Unknowns: A Tool for Large Eddy Simulations?. In: Voke, P.R., Sandham, N.D., Kleiser, L. (eds) Direct and Large-Eddy Simulation III. ERCOFTAC Series, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9285-7_23
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DOI: https://doi.org/10.1007/978-94-015-9285-7_23
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