LARGE EDDY SIMULATION USING A HIGH-ORDER NODAL DISCONTINUOUS GALERKIN METHOD ON UNSTRUCTURED GRIDS

摘要

In this paper we discuss the development of a robust, high-order Discontinuous Galerkin (DG) spectral element method for LES of compressible flows. The method secures geometrical flexibility through a fully unstructured grid (triangles in 2D and tetrahedral elements in 3D), allows for arbitrary order of accuracy and has excellent stability properties. An element based filtering technique is used in conjunction with the dynamic procedure to model the effect of sub-grid scales.