On Thu, Dec 22, 2011 at 19:20, Mohamad M. Nasr-Azadani <mmnasr at gmail.com>wrote:
> Any hints on what is happening here or how I could narrow it down? I would start by following the general advice in the FAQ http://www.mcs.anl.gov/petsc/documentation/faq.html#kspdiverged > I know that we had an early discussion on the convergnce for the > incompressible CFD problems and boomerAMG preconditioning, That was about solving the coupled system. That shouldn't be an issue for the Poisson problem. > but it seems that for this case, that is the only one that does not blow > up for most of the time integration I have. Since this problem only occurs after long time integration, you might consider writing out the model state when you see divergence so that you can experiment with alternative methods quickly. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111222/ea87dbc8/attachment.htm>
