prescribibg cyclic boundary in openfoam
 

Hi there,

I am fairly new to Openfoam and had a question on cyclic BC:

I have a case, with a rectangular domain that I want to prescribe cyclic BC to its front-back and up-down boundaries.

the mesh on those boundaries are structured and fully identical.


In the U and p files inside the 0 folder, I have uased the new names of the boundaries (c_front, ....). Then I used the createPatchDict, and ran it.

However, when I want to decompose it, it gives me errors that seems to be due to the Patch things. Also, inside the Ploymesh folder, I can't find the new names in the file boundary.

Is there any subtle thing that I have to take care when I want to make those boundaries cyclic?

Just in case, here is my createPatchDict

// ----- createPatchDict ----------------------------------------------
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object createPatchDict;
}
// --------------------------------------------------------------------

pointSync false;

patches
(
{
name c_up;
patchInfo
{
type cyclic;
matchTolerance 0.001;
neighbourPatch c_down;
}
constructFrom patches;
patches ( up );
}
{
name c_down;
patchInfo
{
type cyclic;
matchTolerance 0.001;
neighbourPatch c_up;
}
constructFrom patches;
patches ( down );
}
{
name c_front;
patchInfo
{
type cyclic;
matchTolerance 0.001;
neighbourPatch c_back;
}
constructFrom patches;
patches ( front );
}
{
name c_back;
patchInfo
{
type cyclic;
matchTolerance 0.001;
neighbourPatch c_front;
}
constructFrom patches;
patches ( back );
}
);

// --------------------------------------------------------------------