[K.C.]

Dear Foamer,

actually I try to create a mesh consisting of 3 blocks with differentnumber of cells. The 3 blocks are already created and can be seen in the attached figure (not merged at this point; Dict attached, additional vertices were used in previous experiments to solve this problem with 4 blocks).


Now I have problems to merge them. As described on the wiki-page it is not possible to merge a patch that consist of an already merged edge, if it is not the master patch. Every single merge works, but if I try to merge the resulting patches, blockMesh gives the following error:

"Creating attachPolyTopoChanger

--> FOAM FATAL ERROR:
Face 99 reduced to less than 3 points. Topological/cutting error B.
Old face: 2(82 131) new face: 2(22 47)

From function void slidingInterface::coupleInterface(polyTopoChange& ref) const
in file slidingInterface/coupleSlidingInterface.C at line 1795.

FOAM aborting"

, even if the edge-consisting patch is the master patch.

How can I connect these three blocks to one single mesh? Or does anybody of you have another idea of creating such a mesh?

[ancolli]

I have the same problem. Could u solve it?

[Antimony]

Hi,

Basically, it depends on what you want to do. Do you want to merge the meshes such that the interface/common face disappears? If so then, you cannot have different mesh resolution on the two faces. At least that is what I found when I was attempting to do something similar. I think stitchMesh also failed when I tried to stitch together such different mesh blocks.

What worked, to a certain extent, was to treat the interfaces/common faces as cyclicAMI. So you might want to look into that if you are merging multiple blocks with different meshes.

Hope this helps.

Cheers,
Antimony