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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

LARGE-EDDY SIMULATION OF THE FLOW AROUND A SURFACE-MOUNTED CUBE USING A DYNAMIC ONE-EQUATION SUBGRID MODEL

Sinisa Krajnovic
Division of Fluid Dynamics, Department of Applied Mechanics, Chalmers University of Technology, Gothenburg, Sweden

Lars Davidson
Division of Thermo and Fluid Dynamics, Department of Applied Mechanics, Department of Mechanical Engineering, Chalmers University of Technology, Hörsalvagen 7b, SE41296 Göteborg, Sweden

Abstract

Dynamic one-equation models enable us to predict the reverse transport of turbulent energy. The present paper provides an explanation of this "backscatter" phenomenon. LES was used to study the k equation with the aim of improving RANS models. This work is part of the project entitled "Large Eddy Simulation for Computing the Flow Around Vehicles" (http://www.tfd.chalmers.se/~lada/projects/sinisa/proright.html) in collaboration between the Department of Thermo and Fluid Dynamics at Chalmers and the CFD group at the Volvo Car Corporation.