The evaluation of a detached eddy simulation based on the k-ω-Ï 2¯-f model with three flow configurations

Detached Eddy Simulation (DES) based on the k-ω-υ2¯-f model, termed DES-k-ω-υ2¯-f, is developed and evaluated in the present study. In this model, the RANS-LES switching is achieved by an adaptation of the turbulent length scale between the LES and RANS regions. The SGS model coefficient is calibrated by the decaying homogeneous isotropic turbulence (DHIT). The capabilities of the proposed model are evaluated on various geometries, i.e. the plane channel flow, wavy channel flow and two side by side square cylinders. The DES results are compared with the URANS and LES results obtained in the present study and the available results obtained in other references. A good agreement is found between the results of the proposed DES model and the LES for three flow configurations employed. For the cases with flow separation, the DES model demonstrates accurate predictions in reproducing the resolved flow and turbulence quantities in comparison with full-resolved LES.