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Forum: OpenFOAM Running, Solving & CFD

April 28, 2011, 10:17

Replies: 9

Worth parallelizing ?

Views: 2,077

Posted By alf12

So, I have done the test Bernhard talked about....

So, I have done the test Bernhard talked about. Here are the results :
- Two cases simultanously = 9926 s (averaged, respectively 9965 s and 9887 s)
- Same case alone = 4695 s

No comment !
...

Forum: OpenFOAM Running, Solving & CFD

April 26, 2011, 18:49

Replies: 9

Worth parallelizing ?

Views: 2,077

Posted By alf12

So, I have checked and the computer I have used...

So, I have checked and the computer I have used to test has a single memory channel, so it is likely to be why running the program in parallel is not so efficient with my configuration

Beyond my...

Forum: OpenFOAM Running, Solving & CFD

April 21, 2011, 04:13

Replies: 9

Worth parallelizing ?

Views: 2,077

Posted By alf12

I have done test with a 500 000 cell mesh. Test...

I have done test with a 500 000 cell mesh. Test is carried out on a dual core processor so I have 250 000 cells per core and 5000 shared cells between the two cores.

Forum: OpenFOAM Running, Solving & CFD

April 20, 2011, 10:11

Replies: 9

Worth parallelizing ?

Views: 2,077

Posted By alf12

I have used decomposePar using scotch method. ...

I have used decomposePar using scotch method.
It gives 5000 shared cells (so about 1% of mesh size).
I have also tried simple decomposition method but I had twice as much shared cells.

Forum: OpenFOAM Running, Solving & CFD

April 20, 2011, 09:43

Replies: 9

Worth parallelizing ?

Views: 2,077

Posted By alf12

Worth parallelizing ?

Hi,

I have tried to run pisoFoam both in parallel and on a single processor and result is quite upsetting. I have carried out test with a dual core processor on a 500 000 cell mesh.

I only save...

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