[loic.ruan]

Dear Foamers,

I am using conjugateHeatSimpleFoam for my coupled heat transfer problem. I got some good results when I am not running in parallel. But as it takes very long, I would like to switch it to parallel.

I tried with the "scotch" decomposition method to split my mesh. It worked, but when I visualized the result in paraview, it is different from the sequential run. Actually, the decomposition was not done properly, the solid region which corresponds to a fluid region are not in the same processor, so I believe the coupled temperature did not work, which gives a different result.

After, I tried with the "simple" decomposition method to put the solid and the surrounding fluid in the same processor. But as the solid region is smaller than the fluid region, there are still some regions where they are not connected, and thus, give bad results.

The "manual" decomposition method may solve my issues, but I don't know how to create my own "cellDecomposition" file. I tried decomposePar -cellDict to have a cellDecomposition file, but it is just a list of 0, 1, 2 and 3, I don't know how to work with it.

I would appreciate if anyone can help me.

Thanks in advance for your help !

Loïc

[loic.ruan]

The OpenFOAM extend 3.0 is actually not working well in parallel. So I used the extend 3.1 version to make it work.

However you still need to add the globalFaceZones option in the decomposeParDict.

Loïc

[Sonia_DUO]

Originally Posted by loic.ruan

The OpenFOAM extend 3.0 is actually not working well in parallel. So I used the extend 3.1 version to make it work.

However you still need to add the globalFaceZones option in the decomposeParDict.

Loïc

Thanks a lot