An existing two-equation eddy viscosity turbulence model was modified by the authors by application of the normal Reynolds stresses "realizability" constraint to the turbulent time scale τ=k/ε. The model was then sensitized to local grid spacing through relatively straightforward modifications in the k-equation destruction term, obtaining a scale-resolving hybrid RANS/LES formulation. The resulting hybrid form was implemented into an open source finite volume CFD code and evaluated for the resolution of high Reynolds number essentially incompressible flows. The cases studied here include aerodynamic and aeroacoustic predictions for a standard simplified car mirror shape.
Krastev, V.k., Bella, G. (2015). High reynolds number hybrid RANS/LES modeling with turbulent time scale bounding. ??????? it.cilea.surplus.oa.citation.tipologie.CitationProceedings.prensentedAt ??????? International Conference on Numerical Analysis and Applied Mathematics 2014, ICNAAM 2014, Rodos Palace Hotel, grc [10.1063/1.4912569].
High reynolds number hybrid RANS/LES modeling with turbulent time scale bounding
Krastev V. K.;Bella G.
2015-01-01
Abstract
An existing two-equation eddy viscosity turbulence model was modified by the authors by application of the normal Reynolds stresses "realizability" constraint to the turbulent time scale τ=k/ε. The model was then sensitized to local grid spacing through relatively straightforward modifications in the k-equation destruction term, obtaining a scale-resolving hybrid RANS/LES formulation. The resulting hybrid form was implemented into an open source finite volume CFD code and evaluated for the resolution of high Reynolds number essentially incompressible flows. The cases studied here include aerodynamic and aeroacoustic predictions for a standard simplified car mirror shape.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
