| DaSh |
October 25, 2013 05:39 |
createPatch produces error "faces with negative volume decomposition"
Hello All,
I just rebuild a closed cylindrical mesh into a cyclic cylindrical mesh. For the purpose of reducing the number etc. I used createPatch, respective a createPatchdict. Everything worked fine so far, but now I get this error when trying to run pisoFoam:
Code:
Create time
Create mesh for time = 0
Reading field p
Reading field U
Reading/calculating face flux field phi
Selecting incompressible transport model Newtonian
Selecting turbulence model type LESModel
Selecting LES turbulence model Smagorinsky
#0 Foam::error::printStack(Foam::Ostream&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1 Foam::sigFpe::sigHandler(int) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2 in "/lib64/libc.so.6"
#3 Foam::divide(Foam::Field<double>&, double const&, Foam::UList<double> const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#4 Foam::operator/(double const&, Foam::tmp<Foam::Field<double> > const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#5 Foam::surfaceInterpolation::makeDeltaCoeffs() const in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
#6 Foam::surfaceInterpolation::deltaCoeffs() const in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libfiniteVolume.so"
#7 Foam::incompressible::LESModel::LESModel(Foam::word const&, Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const&, Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh> const&, Foam::transportModel&, Foam::word const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libincompressibleLESModels.so"
#8 Foam::incompressible::LESModels::Smagorinsky::Smagorinsky(Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const&, Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh> const&, Foam::transportModel&, Foam::word const&, Foam::word const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libincompressibleLESModels.so"
#9 Foam::incompressible::LESModel::adddictionaryConstructorToTable<Foam::incompressible::LESModels::Smagorinsky>::New(Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const&, Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh> const&, Foam::transportModel&, Foam::word const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libincompressibleLESModels.so"
#10 Foam::incompressible::LESModel::New(Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const&, Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh> const&, Foam::transportModel&, Foam::word const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libincompressibleLESModels.so"
#11 Foam::incompressible::turbulenceModel::addturbulenceModelConstructorToTable<Foam::incompressible::LESModel>::NewturbulenceModel(Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const&, Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh> const&, Foam::transportModel&, Foam::word const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libincompressibleLESModels.so"
#12 Foam::incompressible::turbulenceModel::New(Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const&, Foam::GeometricField<double, Foam::fvsPatchField, Foam::surfaceMesh> const&, Foam::transportModel&, Foam::word const&) in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/lib/libincompressibleTurbulenceModel.so"
#13
in "/opt/net/OpenFOAM/OpenFOAM-2.1.x/platforms/linux64GccDPOpt/bin/pisoFoam"
#14 __libc_start_main in "/lib64/libc.so.6"
#15
at /home/abuild/rpmbuild/BUILD/glibc-2.15/csu/../sysdeps/x86_64/elf/start.S:116
Gleitkomma-Ausnahme
I did checkMesh -allGeometry -allTopology and I found out, that createPatch produces the following
Code:
Create polyMesh for time = 0
Time = 0
Mesh stats
points: 456000
faces: 1319760
internal faces: 1272240
cells: 432000
boundary patches: 6
point zones: 0
face zones: 0
cell zones: 0
Overall number of cells of each type:
hexahedra: 432000
prisms: 0
wedges: 0
pyramids: 0
tet wedges: 0
tetrahedra: 0
polyhedra: 0
Checking topology...
Boundary definition OK.
Cell to face addressing OK.
Point usage OK.
Upper triangular ordering OK.
Face vertices OK.
Topological cell zip-up check OK.
Face-face connectivity OK.
Number of regions: 1 (OK).
Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface topology Bounding box
aeussereWand 18000 18240 ok (non-closed singly connected) (-1 0 -1) (1 5 1)
innereWand 18000 18240 ok (non-closed singly connected) (-0.5 0 -0.5) (0.5 5 0.5)
cyc_half0 2880 3025 ok (non-closed singly connected) (-1 0 0) (1 0 1)
cyc_half1 2880 3025 ok (non-closed singly connected) (-1 0 -1) (1 0 0)
cyc_half10 2880 3025 ok (non-closed singly connected) (-1 5 0) (1 5 1)
cyc_half11 2880 3025 ok (non-closed singly connected) (-1 5 -1) (1 5 0)
Checking geometry...
Overall domain bounding box (-1 0 -1) (1 5 1)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
Boundary openness (1.00823e-17 -8.79755e-18 -1.68404e-16) OK.
Max cell openness = 2.53899e-16 OK.
Max aspect ratio = 5.92719 OK.
Minimum face area = 0.000278357. Maximum face area = 0.00174528. Face area magnitudes OK.
Min volume = 1.85571e-05. Max volume = 3.59782e-05. Total volume = 11.7796. Cell volumes OK.
Mesh non-orthogonality Max: 0.000138361 average: 2.95756e-06
Non-orthogonality check OK.
Face pyramids OK.
Max skewness = 0.0127689 OK.
Coupled point location match (average 0) OK.
***Error in face tets: 11520 faces with low quality or negative volume decomposition tets.
<<Writing 11520 faces with low quality or negative volume decomposition tets to set lowQualityTetFaces
Min/max edge length = 0.0130896 0.0666667 OK.
All angles in faces OK.
Face flatness (1 = flat, 0 = butterfly) : average = 1 min = 1
All face flatness OK.
Cell determinant (wellposedness) : minimum: 0.260484 average: 3.33264
Cell determinant check OK.
Concave cell check OK.
Failed 1 mesh checks.
Problem is, that the 11520 (=4 * 2880, these are the cyclics) negative volumes, were not there before. The closed mesh was fine!
Do you have any suggestions concerning this? Is it a bug? Why do I have these negative cells now, since I did not change the order of vertices for the faces?
Help is indeed welcome :)
Cheers,
Danesh
Edit: "Gleitkomma-Ausnahme" is german for floating point exception :-D |
