Faster Relaxations for non-structured MG with Voronoi coarsening

摘要: A multigrid (MG) method for calculating 2D steady Euler flows on a non-structured mesh is proposed. The option of non-nested meshes is chosen, but node-nested coarser meshes are built by using node elimination and Voronoi reconnection. Then, several relaxation methods, involving multistage-Jacobi and Defect Correction are introduced and compared in a MG context, in order to obtain fast MG convergence.