Print Email Facebook Twitter Energy transfers and spectral eddy viscosity in large-eddy simulations of homogeneous isotropic turbulence: Comparison of dynamic Smagorinsky and multiscale models over a range of discretizations Title Energy transfers and spectral eddy viscosity in large-eddy simulations of homogeneous isotropic turbulence: Comparison of dynamic Smagorinsky and multiscale models over a range of discretizations Author Hughes, T.J.R. Wells, G.N. Wray, A.A. Faculty Civil Engineering and Geosciences Department Design & Construction Date 2004-10-05 Abstract Energy transfers within large-eddy simulation (LES) and direct numerical simulation (DNS) grids are studied. The spectral eddy viscosity for conventional dynamic Smagorinsky and variational multiscale LES methods are compared with DNS results. Both models underestimate the DNS results for a very coarse LES, but the dynamic Smagorinsky model is significantly better. For moderately to well-refined LES, the dynamic Smagorinsky model overestimates the spectral eddy viscosity at low wave numbers. The multiscale model is in good agreement with DNS for these cases. The convergence of the multiscale model to the DNS with grid refinement is more rapid than for the dynamic Smagorinsky model. Subject flow simulationturbulenceviscosityconvergence of numerical methodsdifferential equations To reference this document use: http://resolver.tudelft.nl/uuid:1409cb4d-167c-46da-aa82-1b4926fad230 DOI https://doi.org/10.1063/1.1789157 Publisher American Institute of Physics ISSN 1070-6631 Source http://link.aip.org/link/PHFLE6/v16/i11/p4044/s1 Source Physics of Fluids, 16 (11), 2004 Part of collection Institutional Repository Document type journal article Rights (c) 2004 The Author(s); American Institute of Physics Files PDF Wells_2004.pdf 1.04 MB Close viewer /islandora/object/uuid:1409cb4d-167c-46da-aa82-1b4926fad230/datastream/OBJ/view