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[blockMesh] How can I connect 2 blocks with a different grading? |
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November 15, 2009, 16:46 |
How can I connect 2 blocks with a different grading?
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#1 |
New Member
Steffen Goertz
Join Date: Jul 2009
Posts: 4
Rep Power: 17 |
Hi
In my mesh, I need to connect blocks where the cell-faces don't exactly fit. Sometimes the number of cells is different, sometimes the grading. Is there a way to do this? I was trying around for some time now, but didn't find a way. Perhaps someone can help me? Regards Ghash |
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November 16, 2009, 04:21 |
Ggi
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#2 |
New Member
Johannes Kneer
Join Date: Mar 2009
Location: Germany, Karlsruhe
Posts: 13
Rep Power: 17 |
Hi Gash,
have a look at the general grid interface (GGI) in OpenFOAM-1.5-dev, which provides a way to interpolate between non-matching cell-faces/patches. The 1.5-dev version also has a tutorial case: icoDyMFoam/mixerGgi cheers, Johannes |
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November 18, 2009, 06:09 |
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#3 |
Senior Member
Hrvoje Jasak
Join Date: Mar 2009
Location: London, England
Posts: 1,907
Rep Power: 33 |
A sliding interface (called mergedPatchPairs in blockMesh) should also do the job for you.
Good luck, Hrv
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Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk |
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June 29, 2010, 14:25 |
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#4 |
New Member
Alan Kastengren
Join Date: Mar 2009
Posts: 3
Rep Power: 17 |
Is there a tutorial for version 1.6 that shows this? I'm having a similar problem with a wedge geometry; I have two blocks with different grid spacing that I want to merge, but I keep getting errors. If I try face matching as described in the User Guide, I get errors that there is an inconsistent number of faces between the two blocks. If I try tface merging by defining patches on the interface between the two blocks and putting the faces in the mergePatchPairs list at the end of the blockMeshDict file, I get errors that this, followed by a large amount of additional text:
Trying to specify a boundary face 4(3 4 5 3) on the face on cell 0 which is either an internal face or already belongs to some other patch. |
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September 14, 2016, 11:27 |
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#5 |
New Member
gned
Join Date: Oct 2012
Posts: 18
Rep Power: 14 |
Alan,
probably your error was about that : When defining a face of a patch, the vertices of the neighbor blocks or patches must not have the same vertices number, you have to create double vertices, meaning same points but other vertices number. |
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