Semi-coarsening in three directions for Euler-flow computations in three dimensions

A multiple semi-coarsened multigrid method for solving discretized, steady 3-D Euler equations of gas dynamics, is described and applied. Convergence results are presented for the case of the ONERA-M6 wing at transonic conditions. Comparisons are made with an optimal standard multigrid method, as well as with a single-grid method. Semi-coarsened multigrid appears to yield the best 3-D convergence behavior