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Forum: OpenFOAM Running, Solving & CFD

October 21, 2011, 07:42

Replies: 8

poor performance at massive parallel run using SGI cluster

Views: 3,339

Posted By matthias

I will try using rel tolerance 0.1 but increasing...

I will try using rel tolerance 0.1 but increasing the rel. tolerance impairs also the numerical solution?

The cluster has a parallel storage system connected by IB with two rails. So the data...

Forum: OpenFOAM Running, Solving & CFD

October 21, 2011, 06:35

Replies: 8

poor performance at massive parallel run using SGI cluster

Views: 3,339

Posted By matthias

I tested all settings posted here but no one...

I tested all settings posted here but no one seems to be the holy grail.

@Canesin, Alberto: using only PCG with DIC seems to work best. An iteration takes now ~ 60s.

@kmooney: an iteration...

Forum: OpenFOAM Running, Solving & CFD

October 19, 2011, 10:28

Replies: 8

poor performance at massive parallel run using SGI cluster

Views: 3,339

Posted By matthias

poor performance at massive parallel run using SGI cluster

Hi all,

I would like to address this issue to the forum since I have no more idea where I can optimize my setup.

Some times ago I run a case with 190Mio cells on a SGI ICE cluster using 2048...

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