View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0004117 | OpenFOAM | Bug | public | 2024-07-24 09:01 | 2024-07-27 17:28 |
| Reporter | blttkgl | Assigned To | chris | ||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Platform | GNU/Linux | OS | Other | OS Version | (please specify) |
| Product Version | 12 | ||||
| Summary | 0004117: cylindricalBackground option in snappyHexMeshConfig generates invalid mesh | ||||
| Description | When cylindricalBackground option is used in snappyHexMeshConfig utility, the utility generates an outer and rotatingZone searchableCylinder geometries, and projects the edges to these geometries. The bounds of the cylinders are set to be exact zMin and zMax bounds of the bounding box, and for some reason this results with an invalid mesh. | ||||
| Steps To Reproduce | Copy the /meshes/snappyHexMesh/pipe tutorial. Replace the Allrun with the attached Allrun, and execute. Visualize the "broken" and "fixed" mesh regions using paraview. | ||||
| Additional Information | Possible way to remedy: Update the zmin and zmax bounds by multiplying them with an integer at: https://github.com/OpenFOAM/OpenFOAM-dev/blob/13044b24badcb891417102dbb91f562ecd2343fd/applications/utilities/preProcessing/snappyHexMeshConfig/blockMeshCylindricalConfiguration.C#L275 | ||||
| Tags | No tags attached. | ||||
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Allrun (1,007 bytes)
#!/bin/sh
cd ${0%/*} || exit 1 # Run from this directory
# Source tutorial run functions
. $WM_PROJECT_DIR/bin/tools/RunFunctions
# Copy pipe surface from resources directory
mkdir -p constant/geometry
cp $FOAM_TUTORIALS/resources/geometry/pipe*.obj.gz constant/geometry/
runApplication surfaceFeatures
runApplication snappyHexMeshConfig -bounds '((-26 -26 -60) (26 26 84))' -cylindricalBackground -nCells '(10 20 100)'
runApplication -s broken blockMesh -region broken -dict system/blockMeshDict
foamDictionary system/blockMeshDict -entry geometry/rotatingZone/point1 -set '(0 0 -120)'
foamDictionary system/blockMeshDict -entry geometry/rotatingZone/point2 -set '(0 0 180)'
foamDictionary system/blockMeshDict -entry geometry/outer/point1 -set '(0 0 -120)'
foamDictionary system/blockMeshDict -entry geometry/outer/point2 -set '(0 0 180)'
runApplication -s fixed blockMesh -region fixed -dict system/blockMeshDict
#------------------------------------------------------------------------------
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Fixed by commit: https://github.com/OpenFOAM/OpenFOAM-dev/commit/2ff9df21e80d20e8730dc28b41b02f3bd04fde94 Projections in blockMesh are more reliable when the searchableCylinders extend beyond the zMin, zMax mesh bounds I don't think there is any downside. I extended both by the zMax - zMin span. Multiplying by factor does not work when zMin is positive or zMax is negative. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2024-07-24 09:01 | blttkgl | New Issue | |
| 2024-07-24 09:01 | blttkgl | File Added: Allrun | |
| 2024-07-24 09:01 | blttkgl | File Added: pipe_blockmesh.png | |
| 2024-07-27 17:28 | chris | Assigned To | => chris |
| 2024-07-27 17:28 | chris | Status | new => resolved |
| 2024-07-27 17:28 | chris | Resolution | open => fixed |
| 2024-07-27 17:28 | chris | Note Added: 0013326 |
