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[snappyHexMesh] snappyHexMesh decomposition error |
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February 27, 2012, 01:16 |
snappyHexMesh decomposition error
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#1 |
New Member
John Smith
Join Date: Feb 2012
Posts: 4
Rep Power: 14 |
Hi, I'm pretty new at OpenFOAM and I'm trying to so a dsmcFoam simuation using a mesh created with snappyHexMesh. The mesh looks fine in ParaView but I get warnings when I run dsmcInitialise, and the same warnings when I run the simulation which cause it to crash. The error says:
--> FOAM Warning : From function Foam::List<Foam::FixedList<Foam::label, 4> >Foam::Cloud<ParticleType>::faceTetIndices(label fI, label cI) const in file meshes/polyMesh/polyMeshTetDecomposition/polyMeshTetDecomposition.C at line 561 No base point for face 25085, 3(3298 2596 2567), produces a valid tet decomposition. Another warning says: No base point for face xxxxx, (xxxx)produces a decomposition that has a minimum volume greater than tolerance I've looked all over the place trying to figure out what's causing this error but with no luck. Does anyone know what this error means or how I might fix it? |
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April 8, 2013, 02:53 |
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#2 |
New Member
Esmaeil Ahmadiyan
Join Date: Sep 2011
Posts: 26
Rep Power: 14 |
Hi dear johnsmith332
I have same problem as you too. Could you help me to resolve it. Thanks in advance. Best regards. e.ahmadiyan |
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June 25, 2013, 11:33 |
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#3 |
New Member
Jackie Chou
Join Date: Mar 2013
Posts: 12
Rep Power: 13 |
hi, Esmaeil and John,
have you found the way to solve this problem above? Could you give me a hint for it ? thank you! best regards, Jackie |
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July 29, 2013, 09:57 |
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#4 |
New Member
Join Date: Jul 2013
Posts: 8
Rep Power: 12 |
Looks like the problem is with face tets.
If your mesh is generated with snappyHexMesh, try the following: In snappyhexMeshDict file, look for "minTetQuality". //- Minimum quality of the tet formed by the face-centre // and variable base point minimum decomposition triangles and // the cell centre. Set to very negative number (e.g. -1E30) to // disable. // <0 = inside out tet, // 0 = flat tet // 1 = regular tet For a regular tet, it should be positive. Try setting it to 1. If it does not work, set it to a very low positive number. Say 1e-10. One way to check whether the issue with face tet is resolved or not before the start of the simulation is to do an "checkMesh -allGeometry". It will report if there are any issues with face tets. Hope this helps. ramsky |
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April 7, 2017, 22:56 |
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#5 |
New Member
Manuel Fermin Fonseca
Join Date: Nov 2014
Location: Valencia, Venezuela
Posts: 18
Rep Power: 11 |
hi, have you used first the blockmesh command? i had the same error and it was because i forgot to execute the blockmesh...
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