|November 13, 2015, 21:59||
How to merge blocks? Match, merge or stitch?
Join Date: Jul 2009
Posts: 44Rep Power: 9
I'm stuck with a doubt about the difference between patch matching and patch merging, a feature that I need as I'd like to create blockMeshDict files with a multiblock philosophy (because of the origins of each block, I prefer to create multiblock meshes).
So far, none of both seems to work well. I only know that patch merging deletes coinciding nodes and patch matching doesn't. The resulting grid is shown in the picture: "mergedandmatchedpatches.png".
I did a try out, connecting 2 blocks of one hex each, one by patch matching and one by patch merging.
The blockMeshDict files are attached to this question and are named: "blockMeshDict_mergedpatches.txt" and "blockMeshDict_matchedpatches.txt".
The merge variant yields 12 nodes, while the match variant yields 16 nodes, so far everything is as expected.
However, checkMesh-ing the merge variant gives an error on face connectivity, see "checkMesh_mergedpatches.txt", while the matched variant yields an errorless mesh after running checkMesh, see "checkMesh_matchedpatches.txt", but gives the comment:
*Number of regions: 2 The mesh has multiple regions which are not connected by any face.
In my examples, merging does not yield a unique domain, while matching (apart fromt he strange pyramid border between the blocks) yields a wrong mesh according to checkMesh.
My questions to ye foamers are:
Well, these are a lot of questions, maybe too many for just one post. I hope to get some clue at least.
Thank you in advance,
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