Title: Performance of Reynolds-averaged turbulence and scalar-flux models in complex turbulence with flow impingement

Authors: K. Abe

Addresses: Department of Aeronautics and Astronautics, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812 8581, Japan

Abstract: The present paper is a contribution to the ongoing search for better Reynolds-averaged turbulence and scalar-flux models. In this study, several combinations of velocity- and scalar-field models were investigated. Recently-developed algebraic NLEVMs generally provide reasonable turbulence properties for the present test cases. A quadratic extension of the GGDH model (quadratic model) was very effective in improving the prediction accuracy of the streamwise scalar flux in wall-shear flows. On the other hand, the GGDH model has shown an advantage in predicting the scalar transfer in the stagnation region. Therefore, a combined form of the GGDH and quadratic models was discussed.

Keywords: non-linear eddy-viscosity models; scalar-flux models; turbulence models; flow impingement; CFD; computational fluid dynamics; turbulent flows.

DOI: 10.1504/PCFD.2006.009485

Progress in Computational Fluid Dynamics, An International Journal, 2006 Vol.6 No.1/2/3, pp.79 - 88

Published online: 05 Apr 2006 *

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