Timo Heister

Can you share log from the last time step? We might need to look at the last graphical output as well.

Thank you. Yes, it looks like the solution it blowing up.

@zjiaqi2018 Can you try to add "Time steps between mesh refinement = 0" in the mesh refinement section? It seems that the mesh gets adapted/coarsened over time (is that true?)....

@jdannberg Should we try one more refinement next?

We would be at 1.6 million DoFs, right? That might be too much for this cookbook. I would suggest we only make the former change.

Hi @laila-16, that would have been useful to mention when you open up the pull request. :-) We typically describe what we are doing and more importantly why we are...

Can you post the output for "single Advection, iterated defect correction Stokes, without gmg" as well? The only thing I can think of right now is that it has to...

Something seems broken here. I also don't like that GMG requires 1000+ iterations. That can't be right.

Can you share the prm for the last test that you ran?

@zjiaqi2018 Can you take a look at this issue as well? Let us know if you have any suggestions on what to try or what could be the problem here.