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MODELLING TRANSITION USING AN INTERMITTENCY TRANSPORT EQUATION

Koen Lodefier
Dept. of Flow, Heat and Combustion Mechanics, Ghent University, St. Pietersnieuwstraat 41, B-9000 Gent, Belgium

Bart Merci
Department of Mechanics of Flow, Heat and Combustion, Ghent University, St-Pietersnieuwstraat 41, 9000 Gent; and Postdoctoral Fellow of the Fund of Scientific Research - Flanders,Belgium

Chris De Langhe
Dept. of Flow, Heat and Combustion Mechanics, Ghent University, St. Pietersnieuwstraat 41, B-9000 Gent, Belgium

Erik Dick
Dept. of Flow, Heat and Combustion Mechanics, University of Gent, St. Pietersnieuwstraat 41, 9000 Gent, Belgium

Resumo

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. The intermittency factor is a multiplier of the turbulent viscosity computed by the turbulence model. The quality of the transition model, developed on flat plate test cases, is illustrated for cascades.