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non reproducible results with respect to domain decomposition

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Old   January 17, 2015, 21:44
Default non reproducible results with respect to domain decomposition
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vinch
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Hi guys,
I'm doing simple tests using the application BuoyantBoussinesqPimpleFoam. It's basically the same example than the hot room given, where I added an inflow on every sides of the box.
However, I did the exact same simulation on 24 processors, but specifying in system/decomposeParDict a different domain decomposition. I used the following:
(24 1 1)
(6 4 1)
(4 6 1)

I joined to this message the results of the simulations at an equal time. The plots are showing a cut in the z direction. On the left hand side, the Uz component of the velocity is given, and on the right hand side, mag(U) is given.

We can see that Uz changes from a simulation to another.
I also joined a decomposeParDict file I use as text file.

Did anybody experienced the same problem? Is there a way to fix that?


no_forcing_1.jpg

no_forcing_2.jpg

no_forcing_3.jpg

decomposeParDict.txt
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Old   October 18, 2021, 10:57
Default Any solution?
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Hi Vinci,

Did found the reason for the not able to reproducibility results with different processors.
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Old   November 4, 2021, 15:22
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HPE
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Could any of you provide a reproducible example for this?
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