Agglomeration multigrid for two-dimensional viscous flows

摘要: Abstract Agglomeration multigrid, which has been demonstrated as an efficient and automatic technique for the solution of Euler equations on unstructured meshes, is extended to viscous turbulent flows. For diffusion terms, coarse grid discretizations are not possible, more accurate transfer operators required well. A Galerkin operator construction implicit prolongation proposed. Their suitability evaluated by examining their effect Laplace's equation. The resulting strategy employed solve Reynolds-averaged Navier-Stokes aerodynamic Convergence rates comparable those obtained a previously developed non-nested mesh multigrid approach demonstrated, suggestions further improvements given.