@misc{
 title = {A new two-scale model for large eddy simulation of wall-bounded flows},
 type = {misc},
 year = {2010},
 source = {Progress in Aerospace Sciences},
 keywords = {Large eddy simulation,Near-wall modeling,Two-scale model,Wall-bounded flows},
 pages = {28-45},
 volume = {46},
 issue = {1},
 websites = {https://www.sciencedirect.com/science/article/pii/S0376042109000335},
 month = {4},
 publisher = {Pergamon},
 id = {4ccb1c94-15b2-3ba4-bb44-eb3f823029b8},
 created = {2021-04-09T15:24:26.762Z},
 file_attached = {false},
 profile_id = {75799766-8e2d-3c98-81f9-e3efa41233d0},
 group_id = {c9329632-2a50-3043-b803-cadc8dbdfc3f},
 last_modified = {2021-04-09T15:24:26.762Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {false},
 hidden = {false},
 source_type = {generic},
 private_publication = {false},
 abstract = {A new hybrid approach to model high Reynolds number wall-bounded turbulent flows is developed based on coupling a two-level simulation (TLS) approach (Kemenov and Menon, 2006 [1], 2007 [2] in the inner region with conventional large eddy simulation (LES) away from the wall. This new approach is significantly different from previous near-wall approaches for LES. In this hybrid TLS-LES approach, a very fine small-scale (SS) mesh is embedded inside the coarse LES mesh. The SS equations capture fine-scale temporal and spatial variations in all three Cartesian directions for all three velocity components near the wall. The TLS-LES equations are derived using a new scale separation operator that allows a smooth transition between the two regions, with the equations in the transition region obtained by blending the TLS large-scale and LES equations. New terms in the hybrid region are identified. The TLS-LES approach is used to study the near-wall features in canonical turbulent channel flows for a range of Reynolds number using relatively coarse large-scale (LS) grids. Results show that the TLS-LES approach is able to capture the effect of both the LS and SS features in the wall region consistently for the range of simulated Reynolds number. © 2009 Elsevier Ltd. All rights reserved.},
 bibtype = {misc},
 author = {Gungor, Ayse Gul and Menon, Suresh},
 doi = {10.1016/j.paerosci.2009.10.001}
}

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This new approach is significantly different from previous near-wall approaches for LES. In this hybrid TLS-LES approach, a very fine small-scale (SS) mesh is embedded inside the coarse LES mesh. The SS equations capture fine-scale temporal and spatial variations in all three Cartesian directions for all three velocity components near the wall. The TLS-LES equations are derived using a new scale separation operator that allows a smooth transition between the two regions, with the equations in the transition region obtained by blending the TLS large-scale and LES equations. New terms in the hybrid region are identified. The TLS-LES approach is used to study the near-wall features in canonical turbulent channel flows for a range of Reynolds number using relatively coarse large-scale (LS) grids. 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