Title: Intermittency based RANS bypass transition modelling

Authors: Koen Lodefier, Bart Merci, Chris De Langhe, Erik Dick

Addresses: Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint, Pietersnieuwstraat 41, B 9000 Gent, Belgium. ' Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint, Pietersnieuwstraat 41, B 9000 Gent, Belgium. ' Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint, Pietersnieuwstraat 41, B 9000 Gent, Belgium. ' Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint, Pietersnieuwstraat 41, B 9000 Gent, Belgium

Abstract: A transition model for describing bypass transition is presented. It is based on a two-equations k-ω model and a dynamic equation for intermittency factor. This intermittency factor is a multiplier of the turbulent viscosity computed by the turbulence model. Following a suggestion by Menter et al. (2002), the start of transition is computed based on local variables. The quality of the transition model, developed on flat plate test cases is illustrated on turbine cascades.

Keywords: bypass transition; intermittency; SST turbulence model; CFD; computational fluid dynamics; turbulent flows.

DOI: 10.1504/PCFD.2006.009484

Progress in Computational Fluid Dynamics, An International Journal, 2006 Vol.6 No.1/2/3, pp.68 - 78

Published online: 05 Apr 2006 *

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