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Zonal Two Equation Kappa-Omega Turbulence Models for Aerodynamic FlowsTwo new versions of the kappa-omega two-equation turbulence model will be presented. The new Baseline (BSL) model is designed to give results similar to those of the original kappa-omega model of Wilcox, but without its strong dependency on arbitrary freestream values. The BSL model is identical to the Wilcox model in the inner 50% of the boundary-layer but changes gradually to the standard kappa-epsilon model (in a kappa- omega formulation) towards the boundary-layer edge. The free shear layers. The second version of the model is called Shear-Stress Transport (SST) model. It is a variation of the BSL model with the additional ability to account for the transport of the principal turbulent shear stress in adverse pressure gradient boundary-layers. The model is based on Bradshaw's assumption that the principal shear-stress is proportional to the turbulent kinetic energy, which is introduced into the definition of the eddy-viscosity. Both models are tested for a large number of different flowfields. The results of the BSL model are similar to those of the original kappa-omega model, but without the undesirable freestream dependency. The predictions of the SST model are also independent of the freestream values but show better agreement with experimental data for adverse pressure gradient boundary-layer flows.
Document ID
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Menter, Florian R.
(Eloret Corp. Sunnyvale, CA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1993
Subject Category
Report/Patent Number
AIAA Paper 93-2906
NAS 1.15:111629
Meeting Information
Meeting: AIAA Fluid Dynamics Conference
Location: Orlando, FL
Country: United States
Start Date: July 6, 1993
End Date: July 9, 1993
Sponsors: American Inst. of Aeronautics and Astronautics
Accession Number
Distribution Limits
Public Use Permitted.
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