Evaluation of SGS Stress and Strain Rate Tensor by Phase Averaging in a Wake of a Rectangular Cylinder : Numerical analysis by LES

Abstract

Large Eddy Simulation (LES) with dynamic mixed subgrid-scale model is expected to be the most effective method to represent the inverse transfer of turbulent energy from unresolved small size eddies to resolved large ones (the backscatter). We get instantaneous turbulent properties by using LES. By phase-averaging these properties, the principal features of periodic phenomena can be extracted. In this paper, we compare two kinds of ways of phase-averaging to evaluate the energy transfer. Especially we focus on the relations between phase averaged energy transfer and turbulent properties.