A multigrid smoother for high Reynolds number flows

Erik Sterner

Dept. of Scientific Computing, P.O. Box 120, S-751 04 Uppsala, Sweden


The linearized Navier-Stokes equations are solved in 2D using a multigrid method where a semi-implicit Runge-Kutta scheme is the smoother. With this smoother the stiffness of the equations due to the disparate scales in the boundary layer is removed and Reynolds number independent convergence is obtained.