[wyldckat]

Greetings Arun,

Originally Posted by arunsmec

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:

Notes on scalability: Large test case for running OpenFoam in parallel post #20 (reference: http://www.cfd-online.com/Forums/blo...-parallel.html)

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