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No speedup observed after using renumberMesh

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Old   August 3, 2016, 11:40
Default No speedup observed after using renumberMesh
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I have been using renumberMesh to speed up my parallel calculation of pimpleDyMFoam (for 17 million cells sperad across 256 processors, having AMI interface) but didn't observe any increase in speed compared to a similar case without using renumberMesh.

I used the utility after the parallel decomposition and the bandwidth decreased significantly to 2379 from 67180 after using the utility. Can someone let me know if he/she has obtained any increase in speed using this utility?
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Old   August 3, 2016, 11:54
Bruno Blais
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I am not sure, but I believe you need to renumber before you decompose?

Also, if you have a large number of processor, the impact of renumbering will be much smaller.
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