Home Books eBooks Journals References & Proceedings Authors, Editors, Reviewers A-Z Product Index Awards
Turbulence and Shear Flow Phenomena -1 First International Symposium

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

A COMPARISON OF SUBGRID SCALE MODELS FOR LARGE EDDY SIMULATION OF A CO-ANNULAR SWIRLING FLOW FIELD

Jessica Gullbrand
Dept. of Heat and Power Engineering/Fluid Mechanics, Lund Institute of Technology, SE-221 00 Lund, Sweden; Center for Turbulence Research Stanford, CA 94305-3030, USA

Johan Revstedt
Division of Fluid Mechanics, Lund Institute of Technology P.O. Box 118, S-221 00 Lund, Sweden

Laszlo Fuchs
Department of Mechanics, KTH, CICERO, SE-10044 Stockholm; Division of Fluid Mechanics Lund University Lund, 22363, Sweden

Abstract

Large Eddy Simulation (LES) of an incompressible, turbulent, co-annular swirling flow field have been performed in order to compare the influence of different subgrid scale (SGS) models. Two models were investigated, an implicit model and a stress similarity model. In the simulations using the implicit approach, no explicit SGS model was used. For the stress similarity model, similar behaviour between the resolved and unresolved stresses was assumed. The results from the simulations are compared with experimental data for mean velocities and turbulence intensities.