Preliminary Evaluation and Applications of a Consistent Hybrid LES/RANS Method

In this work, we introduce a recently proposed framework for hybrid LES/RANS modeling and its preliminary applications on simple flows. In this framework, the filtered and Reynolds averaged Navier-Stokes (RANS) equations are solved simultaneously in the whole domain. The novelty of the framework is the dual-solution approach and the consistency between the two solutions achieved via additional drift terms. A hybrid LES/RANS solver is developed within this framework and used to simulate flows in a plane channel and flows in a channel with periodic hills. The results demonstrate that the hybrid solver leads to significantly improved results compared to traditional LES on the same grid.