HIBRID RANS-LES MODELING WITH SST TURBULENCE MODEL APPLIED TO INTERNAL FLOWS

This paper present the evaluation of the performance of hybrid technique for turbulence modeling, called Detached-Eddy Simulation (DES), in enclosures flows. Specifically in three-dimensional lid driven cavities. These methodology is a blend of RANS and LES techniques, where the treatment of boundary layer and low turbulence regions has been done using RANS and treatment of the remaining flow has been performed with LES. In DES methodology the base is a RANS turbulence model, which in the region of RANS turbulent length scale is bigger than LES turbulent length scale, switches and behaves as Smagorinsky sub-grid scale model. The three-dimensional flow formed in lid drive cavities has interesting features that allow the proper assessment of a numerical code or turbulence models, such as the formation of several structures and a large basis of experimental and numerical data. The results correspond to flow inside cubical cavities at Reynolds number 10 4 , in developed turbulence regime. Mean fields and statistical fluctuations of properties flow are presented, as well as, particular characteristics of hybrid model