[FlyBob91]

Hello everybody,
I'm facing the following problem: I created a mesh with Starccm+ and I tried to convert it using ccmToFoam. The problem is that my original mesh contains interfaces (not miving), that connect different part of a pipe. If I tried to start a simulation OpenFoam asks me to set a boundary condition for the interface, that in the "boundaryRegion" file appears as "wall".
Here the error

Cannot find patchField entry for Interface0_1

How can I fix this problem?

Thanks for help,
best regards

[BjoernFoam]

Hello Bob,


I am relatively new to OpenFOAM but willing to share what I have learned so far...

Have you tried to simply remove the corresponding entry in your boundary file?
Remember to also change the first line after the FoamFile header to your new number of boundaries.

[FlyBob91]

Originally Posted by BjoernFoam

Hello Bob,


I am relatively new to OpenFOAM but willing to share what I have learned so far...

Have you tried to simply remove the corresponding entry in your boundary file?
Remember to also change the first line after the FoamFile header to your new number of boundaries.

Hey Björn,
Thank you for the suggestion. I've just tried what you said and I was able to start the simulation but it stops at the first iteration, sign that somwthing wrong is still there.
Just another question. Should I remove the interface in both "boudnary" and "boundaryRegion" files?

[BjoernFoam]

Hello Bob,


please excuse my late reply, I forgot to subscribe and did not get a mail notification...


I don't think that the boundaryRegion file is of much concern to your simulation, if you dont use any boundary-regions in your 0-directory or any other files like the topoSetDict.



Could you run your simulation by now?


Another hint: I usualle get several "wall"- or even several "inlet"-patches when translating meshes to OpenFOAM. If they are written beneath each other you can easely merge your let's say "inlet-patch" by writing the manually calculated result of

startFace*FirstInletPatch - startFace*LastInletPatch + nFaces*LastInletPatch


in the line of



nFaces*FirstInletPatch


and deleting the by now unnecessary inlet-patches.
I usually also delete the inGroups line as i did not need it so far...



Also remember again to change the resulting amount of total patches within the first line after the header of the boundary file.

Best regards

Björn