porousSimpleFoam crash on 40 cores
I'm running a simulation with porousSimpleFoam.
The simulation executed on 7 cores converges after 1295 iterations, but if I try to run the same simulation on 40 cores it diverges after 96 iterations.
Is there any mathematical reason for this?
If yes, there is a way to calculate the max number of cores that can be used?
Thanks to all.
My experience on this is limited, but AFAIK, there are several hypothesis for the crash, since you didn't give any specifics about the case. Some examples:
But I am not sure if it is the case. What was your pressure correction solver.
If it was multigrid then it is possible to crash or diverge. If it was Kyrlov based solver like conjugate gradient then less likely but still depends on preconditioner used.
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