Analysis of a Hybrid RANS/LES Model Using RANS Reconstruction
The Hybrid RANS/LES method proposed is based on the hybrid filter approach introduced by Germano in 2004. In this work, instead of using two explicit models respectively for LES and RANS, we use only a model for LES and we reconstruct the RANS field exploiting the properties of hybrid filter. The reconstruction is obtained from the resolved velocity and the LES subgrid stress tensor. The model has been implemented using a variational approach in a DG-FEM framework and tested for the turbulent channel flow test case. Different configurations for hybrid terms have been compared with DNS data and with pure LES results.
KeywordsTurbulent Channel Flow Detach Eddy Simulation Hybrid Filter Reynolds Stress Tensor Incompressible Case
We acknowledge that the results of this research have been achieved using the PRACE Research Infrastructure resource provided by NIIF (Hungary), within the project DECI-11 HyDiG.
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