Recent progress in incompressible Reynolds averaged Navier-Stokes solvers (Q1367330)

A multiblock-multigrid local refinement method has been developed. The multiblock structure makes grid generation for complex geometries easier, the multigrid techniques significantly accelerate the convergence, and the local refinement provides high spatial resolution of boundary layer and separated vortical flows with reduced computer memory and CPU time. Sample three-dimensional flow computations for complex geometries are presented to illustrate the advantages in term of memory savings and reductions of CPU time in obtaining high spatial resolution. Other recent progress in the application of the preconditioning method to improve the rate of convergence and the modification of the Baldwin-Lomax turbulence model for accurate prediction of the cross-flow separation problems are also discussed.