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Forum: OpenFOAM Running, Solving & CFD April 23, 2013, 10:14
Replies: 9
Views: 6,111
Posted By sail
it is very problem dependent, but i'd say run not...

it is very problem dependent, but i'd say run not necessarly until convergence, but not far from it either. 1000-3000 iterations, maybe?

use mapFields to move the data or just edit manually the...
Forum: OpenFOAM Running, Solving & CFD April 23, 2013, 07:55
Replies: 9
Views: 6,111
Posted By sail
your simulation is beyond recovery earlier than...

your simulation is beyond recovery earlier than that. with the auto time stepping you are already at a DeltaT =1e-14 s, average courant number of 8 and max Co 45.

i dont' know what you changed or...
Forum: OpenFOAM Running, Solving & CFD April 22, 2013, 17:02
Replies: 9
Views: 6,111
Posted By sail
128 cores for a 1 million mesh it is really too...

128 cores for a 1 million mesh it is really too much. I do think that you are getting too much mpi communication overhead.

try with a more reasonable number, like 20-40 cores top.
Forum: OpenFOAM Running, Solving & CFD April 22, 2013, 14:21
Replies: 9
Views: 6,111
Posted By sail
silly me, I haven't noticed that. how big is your...

silly me, I haven't noticed that. how big is your mesh?
Forum: OpenFOAM Running, Solving & CFD April 22, 2013, 11:56
Replies: 9
Views: 6,111
Posted By sail
increasing the tolerance is definitely not what i...

increasing the tolerance is definitely not what i would raccomand. you are trading a small speedup for accuracy. definitely a no-no.

any chanches you can use a coarser mesh? the courant number is...
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