Print Email Facebook Twitter Sensitivity of the scale partition for variational multiscale large-eddy simulation of channel flow Title Sensitivity of the scale partition for variational multiscale large-eddy simulation of channel flow Author Holmen, J. Hughes, T.J.R. Oberai, A.A. Wells, G.N. Faculty Civil Engineering and Geosciences Department Design & Construction Date 2004-02-04 Abstract The variational multiscale method has been shown to perform well for large-eddy simulation (LES) of turbulent flows. The method relies upon a partition of the resolved velocity field into large- and small-scale components. The subgrid model then acts only on the small scales of motion, unlike conventional LES models which act on all scales of motion. For homogeneous isotropic turbulence and turbulent channel flows, the multiscale model can outperform conventional LES formulations. An issue in the multiscale method for LES is choice of scale partition and sensitivity of the computed results to it. This is the topic of this investigation. The multiscale formulation for channel flows is briefly reviewed. Then, through the definition of an error measure relative to direct numerical simulation (DNS) results, the sensitivity of the method to the partition between large- and small-scale motions is examined. The error in channel flow simulations, relative to DNS results, is computed for various partitions between large- and small-scale spaces, and conclusions drawn from the results. Subject turbulencechannel flowflow simulationnumerical analysisvariational techniques To reference this document use: http://resolver.tudelft.nl/uuid:9cdda996-0ab8-4a35-a346-ce912d6e6a8a DOI https://doi.org/10.1063/1.1644573 Publisher American Institute of Physics ISSN 1070-6631 Source http://link.aip.org/link/PHFLE6/v16/i3/p824/s1 Source Physics of Fluids, 16 (3), 2004 Part of collection Institutional Repository Document type journal article Rights (c) 2004 The Author(s); American Institute of Physics Files PDF Wells2_2004.pdf 68.95 KB Close viewer /islandora/object/uuid:9cdda996-0ab8-4a35-a346-ce912d6e6a8a/datastream/OBJ/view