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Averaging in parallel - Simulation slowed down

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Old   March 10, 2010, 04:16
Default Averaging in parallel - Simulation slowed down
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Dr. Fabian Schlegel
Join Date: Apr 2009
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Hello Guys,

I am running OpenFOAM in parallel on a SGI Altix 4700 machine. To speed up my simulation a little bit I used 220 Cpus in parallel for a 2.2 Mio. cell mesh. May be this are a little bit to much Cpus and leads to communication overhead but its just a try.
But the important thing I noticed is, if I enable the averaging with the fieldAverage1() function in my controlDict the simulation is slowed down. I assume that the averaging isn't done in parallel? Did anybody observed a similar behavior? May be there is a better way to average such highly distributed jobs?

kind regards,

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