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Old   September 8, 2010, 07:24
Default parallel and multiphase
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hello,
i have a problem,
my calculation on 4 cpu's differs two much from this on 8 cpu's with the same setup? what did go wrong? (multiphase flow)
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Old   September 8, 2010, 16:52
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What differs exactly? Did you use the same setup? Did the simulation reach convergence?
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Old   September 8, 2010, 17:17
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Thanks for the reply.

I am using the same setup, setting a transient simulation with normal convergene criteria..

when i ran the simulation on 8 cpus the solver command told me that libmp_hp was ignored and it worked and reach the final time.

Even if am monitoring the sims with a couple of Points, there is difference ( in the Rms values too)..

I am using a cluster with different nodes, every node has an other amount of cpus ( 4 and 8)..

thanks beforehand
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Old   September 16, 2010, 08:45
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Is there any idea why differences exist
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Old   September 21, 2010, 13:56
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Did you checked the usual suspects? Mesh quality and interfaces? Did you used double precision?
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Old   September 21, 2010, 15:22
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yes off course. No Improve
But i as turned Turbulence Numerics to High Resolution, all the Simulations are the same.
Ansys Support are trying to resolve the Problem too.
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