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running OpenFoam in parallel

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Old   November 7, 2012, 16:33
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Bruno Santos
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Greetings Arun,

Quote:
Originally Posted by arunsmec View Post
My workstation is equipped with 2 quadcore processors with multithreading (2 threads/core). Does decomposition into more than 8 subdomains make any difference?
I've had a test case with the cavity tutorial, expanded from 2D to 3D, which did not scale well with an AMD 1055T processor with 6 cores, but with 16 sub-domains it was still faster than with 6. Nonetheless, it was possibly a fluke, in the sense that the over-scheduling lead to a slightly better usage of memory and cache.

I've been keeping a blog post with notes on this subject: Notes about running OpenFOAM in parallel
In it you should find this note:
From that post #20 you should be able to learn a bit more about this subject of using a single machine with multiple parallel processes!

Best regards,
Bruno
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