> > Yes, the diagonal of the velocity block is used to form the Schur > > complement approximation explicitly. I'm solving the velocity > > subsystem and the Schur complement subsystem to a relative tolerance > > of 0.01. Decreasing this tolerance does not change the behaviour of > > GMRES with right preconditioning. > > > > Just to be sure, are both of these approximations in the preconditioner or > have you absorbed part into the "operator"?
Both approximations are in the preconditioner. dr. ir. Christiaan Klaij CFD Researcher Research & Development E mailto:C.Klaij at marin.nl T +31 317 49 33 44 MARIN 2, Haagsteeg, P.O. Box 28, 6700 AA Wageningen, The Netherlands T +31 317 49 39 11, F +31 317 49 32 45, I www.marin.nl
