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Application of Near-Wall Eddy-Viscosity Treatment for LES to Complex Flows

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.650
pages 339-342

Gorazd Medic
Flow Physics & Computation Division, Stanford University, Stanford, CA 94305-3030, USA

Georgi Kalitzin
Center for Turbulence Research, Stanford University 2637 Alvarado Row, Stanford, CA 94305, U.S.A.

Abstract

The aim of this work is to apply the eddy-viscosity based near-wall treatment for LES proposed in [1, 2, 3] to complex flows such as the flow in a channel with one wall forming a hill-shaped periodic constriction and the flow in a serpentine channel. The near-wall treatment is evaluated for both coarse grids with a wall stress model and with wall-resolved grids coarsened in wall-parallel directions. The impact of pressure gradient and curvature is investigated in detail. The results are compared to wall-resolved LES for the hill [6] and to the DNS for the serpentine [7].

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