EFFICIENT IMPLEMENTATION OF A COMPACT-PSEUDOSPECTRAL METHOD FOR TURBULENCE MODELING

Abstract

The paper is devoted to parallel implementation of a compact discretization scheme combined with the Fourier pseudospectral method. The idle time of processors resulting from the method of computating derivatives using compact schemes is eliminated by proper ordering of subtasks and by performing useful computations when processors are waiting for data from their neighbors. The correctnes of the algorithm is confirmed by comparison of results of LES simulations with DNS data for flow in a 3D channel with periodic non-slip wall boundary conditions.