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September 8, 2010, 07:24 |
parallel and multiphase
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#1 |
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Location: Germany
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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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September 8, 2010, 16:52 |
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#2 |
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What differs exactly? Did you use the same setup? Did the simulation reach convergence?
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September 8, 2010, 17:17 |
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#3 |
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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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September 16, 2010, 08:45 |
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#4 |
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Is there any idea why differences exist
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September 21, 2010, 13:56 |
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#5 |
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Did you checked the usual suspects? Mesh quality and interfaces? Did you used double precision?
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September 21, 2010, 15:22 |
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#6 |
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Location: Germany
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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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