Comparative study of large eddy simulation of film cooling using a dynamic global-coefficient subgrid scale eddy-viscosity model with RANS and Smagorinsky Modeling

An eddy-viscosity subgrid-scale model proposed by You and Moin [1] applied in large-eddy simulation of a film cooling flow at Re = 4700. The present model needs only a single-level test filter, and therefore is more suitable for large-eddy simulation (LES) in complex geometries. The present model is not more complicated than the dynamic Smagorinsky model in implementation and does not require any ad hoc spatial and temporal averaging or clipping of the model coefficient for numerical stabilization. In addition, the computational cost is not more expensive than that of the dynamic Smagorinsky model. The numerical results of present study are compared with experimental data, Reynolds Averaged Navier–Stokes (RANS) and Smagorinsky model which are in excellent agreement with the existing experimental ones in comparison with computational results of RANS and Smagorinsky model.