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Large eddy simulations using an unstructured grid compressible Navier-Stokes algorithm. (English) Zbl 1010.76045

From the summary: Large eddy simulation (LES) of decay of isotropic turbulence and of channel flow has been performed using an explicit second-order unstructured grid algorithm for tetrahedral cells. The algorithm solves for cell-averaged values using a finite volume form of unsteady compressible filtered Navier-Stokes equations. The inviscid fluxes are obtained from Godunov’s exact Riemann solver. The results show good agreement with experimental data and direct numerical simulations for incompressible channel flow. The Smagorinsky subgrid scale eddy viscosity is less than 10% of molecular viscosity, and therefore the LES is an effective monotone integrated large eddy simulation with molecular viscosity.

MSC:

76F65 Direct numerical and large eddy simulation of turbulence
76M12 Finite volume methods applied to problems in fluid mechanics
76N15 Gas dynamics (general theory)
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