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An Investigation of Hybrid LES/RANS Models for Predicting Turbulent Scalar Transfer

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.810
pages 407-410

Ken-ichi Abe
Department of Aeronautics and Astronautics, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395

M. Inuzuka
Graduate Student, Department of Aeronautics and Astronautics, Kyushu University, Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Abstract

In order to derive a possible path for developing a large eddy simulation (LES) applicable to high Reynolds-number turbulent flows with scalar transfer, a hybrid approach connecting LES with the Reynolds-averaged Navier-Stokes (RANS) modeling in the near-wall region is studied. In this study, an advanced non-linear eddy-viscosity model and a higher-order extension of the generalized gradient diffusion hypothesis model are introduced to resolve the near-wall turbulence and turbulent scalar transfer more correctly. The proposed model is applied to fully-developed plane channel flows with various grid resolutions. Some encouraging results are obtained for further development of this kind of hybrid LES/RANS model.

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