Implicit multiblock Euler and Navier-Stokes calculations

Abstract

Implicit multiblock computations have been carried out for a large number of blocks using explicit coupling between the blocks. The convergence rate of this method is very sensitive to the block partitioning. For the Navier-Stokes equations the height of the blocks should be greater than the boundary-layer thickness. Also, excessively thin blocks will cause breakdown of the algorithm. For transonic calculations the best convergence rate was obtained using a red-black Gauss-Seidel approach. It is concluded that the method is well suited for massively parallel computers