[AliE]

Dear Friends,

I am having some difficulties in understanding how cyclic patches are implemented in openFoam. Let me introduce the simple test case of a 2D plane channel with dimensions 2x1 in x and y direction respectively. "inlet" and "outlet" (left and right) are cyclic patches and the domain is decomposed with 4 processors as shown in the figure attached (cell distribution).

Looking for example at the boundary file in processor0, I can find:


procBoundary0to3throughin
{
type processorCyclic;
inGroups 1(processorCyclic);
nFaces 1;
startFace 5;
matchTolerance 0.0001;
transform unknown;
myProcNo 0;
neighbProcNo 3;
referPatch in;
}

while I would expect:

neighbProcNo 1;

since the periodic face is shared between proc 0 and proc 1 ...

Is there somebody that can shed some light on this?

Thank you very much,

AliE

[AliE]

Nobody knows about that? Even a guess would be appreciated