[petsc-users] KSPMonitorSingularValue

[Klaij, Christiaan]

Thanks for all the answers!

First, I would like to see something printed to stdout, right now I don't.
Assuming my KSPMonitorSet call is correct, could it be that I don't
see anything because I'm using FGMRES? Should I get a warning
when using this monitor with any other KSP beside CG and GMRES?

Second, I have a case where FGMRES stagnates with my custom
PC. I would like to get an impression of the extreme eigenvalues after
applying the PC. If the estimates are only trustworthy upon
convergence, then it's useless of course...

The setting is Navier-Stokes, colocated FVM, matrix-free Krylov-Picard
with SIMPLE preconditioning. It works for most case but stagnates
for this particular case although SIMPLE as solver does converge nicely.


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