Turbulence Model Conditioning for Vortex Dominated Flows Based on Experimental Results

Focusing on vortex dominated flows, related to delta wings, Reynolds Averaged Navier-Stokes numerical simulation with eddy viscosity mod- els is an appropriate tool with respect to the computational effort. Nevertheless, higher ac- curacy is required to improve the prediction of the vortex flow development and characteristics. More complex turbulence models like Reynolds Stress Models introduce stability issues and in- crease the computational costs, not always im- proving the flow solution; Detached Eddy Sim- ulation and Large Eddy Simulation models are not always a viable option due to computational resources. The idea introduced is to enhance the Spalart-Allmaras one-equation eddy viscos- ity model with additional destruction terms, ex- clusively active in the vortex region, optimized with experimental data as reference. The vortex topology is adjusted by correcting the distribu- tion of eddy viscosity. The level of improvement in data accuracy, the range of improvements for the considered test cases and the flexibility of the model variation are investigated to understand the potential of the approach.     «

Focusing on vortex dominated flows, related to delta wings, Reynolds Averaged Navier-Stokes numerical simulation with eddy viscosity mod- els is an appropriate tool with respect to the computational effort. Nevertheless, higher ac- curacy is required to improve the prediction of the vortex flow development and characteristics. More complex turbulence models like Reynolds Stress Models introduce stability issues and in- crease the computational costs,...     »