A DUAL-DISSIPATION SCHEME FOR PRESSURE-VELOCITY COUPLING

Abstract

Within the framework of the SIMPLE algorithm, a dual-dissipation scheme is proposed on nonorthogonal collocated grids for incompressible fluid flow problems, using a cell-centered finite-volume approximation. The dissipative mechanism employs dynamic limiters to control the amount of dissipation, preserving expediences of greater flexibility and increased accuracy in a way similar to the MUSCL approach. The artificial density concept is combined with the pressure Poisson equation, facilitating an avoidance of pressure underrelaxation. To account for the flow directionality in the upwinding, a rotational matrix is evoked to evaluate the convective flux.