Mass flow through cyclic boundary face
I am simulation a section of a combustor using cyclic BC. When I was calculating mass balance and energy balance I realized that the mass flow through the cyclic boundary faces does not cancel as it should (or shouldnt??).
Can somebody shed me some light on this issue?
I have a faint memory of someone telling me this patch integration is not parallel (the cyclic patch crosses processor boundaries). If you have the possibility, you could try to do this on a single machine to find out if that works...
As said, a faint memory, but might be worth to check.
Thanks for your reply!
I solved the problem and here is how:
In the configuration I had before, I had set the cyclic patch manually in the constant/polyMesh/boundary, changing the patch type from wall to cyclic as follows (I first exported my mesh from gambit and then coupled the 2 faces with createPatch utility):
rotationAxis ( 0 0 1 );
rotationCentre ( 0 -0.04 0 );
Then, if I eliminate the transformation entries ("transform", "rotationAxis" and "rotationCentre"), OF configures the patch automatically and now the mass balance is correct as it should be, SOLVING THE PROBLEM.
Anyway, I still dont understand what this parameters mean/do (I though I knew before :( ). I intend to look at the source for their meaning. However if somebody has a hint or answer ready to write here, it would be most appreciated.
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