Pseudo-transient Continuation, Solution Update Methods, and CFL Strategies for DG Discretizations of the RANS-SA Equations

Abstract

This paper assesses the performance of different time integration strategies for discontinuous Galerkin discretizations of the RANS-SA equations.We consider the pseudo-time continuation method derived from the backward Euler scheme in its constrained and unconstrained versions.Solution update methods based on line-search are proposed and tested in combination with different CFL evolution strategies.We present results for test problems ranging from intermediate to difficult in two and three dimensions.