3-DIMENSIONAL MULTIGRID REYNOLDS-AVERAGED NAVIER-STOKES SOLVER FOR UNSTRUCTURED MESHES

A three-dimensional unstructured mesh Reynolds-averaged Navier-Stokes solver is described. Turbulence is simulated using a single field-equa tion model. Computational overheads are minimized through the use of a single edge-based data structure, an efficient multigrid solution tec hnique, and the use of multitasking on shared memory multiprocessors. The accuracy and efficiency of the code are evaluated by computing two -dimensional flows in three dimensions and comparing with results from a previously validated two-dimensional code that employs the same sol ution algorithm. The feasibility of computing three-dimensional turbul ent flows on grids of several million points in less than 2 h of wall clock time is demonstrated.