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[Technical] checkMesh states mesh is OK yet faces are bent pentagons |
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March 20, 2014, 05:40 |
checkMesh states mesh is OK yet faces are bent pentagons
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#1 |
New Member
Richel Bilderbeek
Join Date: Nov 2013
Posts: 14
Rep Power: 13 |
My question is: how can this mesh be correct (and how can the original mesh be incorrect)?
This is a follow-up of http://www.cfd-online.com/Forums/ope...s-correct.html , where I had a AFAIKS correct mesh, yet checkMesh gave two errors. On that mesh I did the following commands: Code:
renumberMesh zipUpMesh How can this mesh be correct (and how can the original mesh be incorrect)? Below I put the content of the AFAIK most important files, you can view all at http://www.richelbilderbeek.nl/ToolO...dCorrected.htm . checkMesh output (I removed some text, indicated with [...]): Code:
[...] Build : 2.1-88b2f2ae3a0b Exec : checkmesh Date : Mar 20 2014 Time : 08:03:54 Host : "AIRBEAR-W7-I5" PID : 2764 Case : D:/Projects/Test/ToolOpenFoamErrorOpenCellsFoundCorrected nProcs : 1 SigFpe : Enabling floating point exception trapping (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Create polyMesh for time = 0 [...] Time = 1 Mesh stats points: 8 internal points: 0 faces: 8 internal faces: 0 cells: 2 boundary patches: 6 point zones: 0 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 0 prisms: 0 wedges: 0 pyramids: 0 tet wedges: 0 tetrahedra: 0 polyhedra: 2 Checking topology... Boundary definition OK. Cell to face addressing OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. *Number of regions: 2 The mesh has multiple regions which are not connected by any face. <<Writing region information to "1/cellToRegion" Checking patch topology for multiply connected surfaces ... Patch Faces Points Surface topology back 1 4 ok (non-closed singly connected) bottom 2 4 ok (non-closed singly connected) front 1 4 ok (non-closed singly connected) left 1 4 ok (non-closed singly connected) right 1 4 ok (non-closed singly connected) top 2 6 ok (non-closed singly connected) Checking geometry... Overall domain bounding box (-1 -1 0) (1 1 1) Mesh (non-empty, non-wedge) directions (1 1 1) Mesh (non-empty) directions (1 1 1) Boundary openness (-2.28837e-018 -1.83069e-017 0) OK. Max cell openness = 5.55112e-017 OK. Max aspect ratio = 2 OK. Minimum face area = 1. Maximum face area = 2.23607. Face area magnitudes OK. Min volume = 0.731939. Max volume = 0.731939. Total volume = 1.46388. Cell volumes OK. Non-orthogonality check OK. Face pyramids OK. Max skewness = 0.34936 OK. Coupled point location match (average 0) OK. Mesh OK. End Code:
FoamFile { version 2.0; format ascii; class vectorField; location "1/polyMesh"; object points; } 8((0 1 1) (-1 0 1) (0 1 0) (0 -1 1) (1 0 0) (0 -1 0) (-1 0 0) (1 0 1)) Code:
FoamFile { version 2.0; format ascii; class faceList; location "1/polyMesh"; object faces; } 8 ( 4(0 2 6 1) 3(5 6 4) 3(4 6 2) 4(1 6 5 3) 4(4 7 3 5) 4(0 7 4 2) 5(3 7 4 6 1) 5(1 6 4 7 0) ) Code:
FoamFile { version 2.0; format ascii; class polyBoundaryMesh; location "1/polyMesh"; object boundary; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 6 ( back { type zeroGradient; nFaces 1; startFace 0; } bottom { type zeroGradient; nFaces 2; startFace 1; } front { type zeroGradient; nFaces 1; startFace 3; } left { type zeroGradient; nFaces 1; startFace 4; } right { type zeroGradient; nFaces 1; startFace 5; } top { type zeroGradient; nFaces 2; startFace 6; } ) Code:
FoamFile { version 2.0; format ascii; class labelList; note "nPoints:8 nCells:2 nFaces:8 nInternalFaces:0"; location "1/polyMesh"; object owner; } 8(1 0 1 0 0 1 0 1) Code:
FoamFile { version 2.0; format ascii; class labelList; note "nPoints:8 nCells:2 nFaces:8 nInternalFaces:0"; location "1/polyMesh"; object neighbour; } 0() |
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March 24, 2014, 10:10 |
Solved
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#2 |
New Member
Richel Bilderbeek
Join Date: Nov 2013
Posts: 14
Rep Power: 13 |
The source error http://www.cfd-online.com/Forums/ope...s-correct.html has been solved and the answer can be found there.
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bent face, checkmesh, mesh, pentagon, renumbermesh |
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