Title: LES of turbulent heat transfer in Couette channel flow using dynamic SGS models

Authors: Donald J. Bergstrom, Jing Yin, Bing-Chen Wang

Addresses: Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada. ' Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada. ' Defence Research and Development Canada – Suffield, P.O. Box 4000, Station Main, Medicine Hat, Alberta T1A 8K6, Canada

Abstract: The present paper documents a Large Eddy Simulation of thermal transport in turbulent Couette flow with a constant wall temperature difference. A local formulation of a dynamic eddy viscosity model is used to model the subgrid-scale stress (SGS), while the SGS heat flux is calculated two ways: using the dynamic eddy viscosity and a constant SGS Prandtl number; and using a second dynamic formulation for the SGS Prandtl number. Both simulations capture important features of the temperature field, although some small differences exist. Implementation of the dynamic SGS Prandtl number in a local formulation required extreme levels of clipping to ensure numerical stability.

Keywords: large eddy simulation; dynamic subgrid-scale heat flux; subgrid-scale Prandtl number; near-wall turbulent heat transfer; Couette channel flow; eddy viscosity modelling; subgrid-scale stress; CFD; computational fluid dynamics; turbulent flows.

DOI: 10.1504/PCFD.2006.009480

Progress in Computational Fluid Dynamics, An International Journal, 2006 Vol.6 No.1/2/3, pp.33 - 39

Published online: 05 Apr 2006 *

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