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Old   September 29, 2009, 08:09
Default kivaToFoam
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Hello,

a friend sent a file in kiva-format. I know there is a nice utility in OF "kivaToFoam".
The conversion is done but if i want to start a calculation an error appears:

Quote:
face 92 and 1372 areas do not match by 0.010736% -- possible face ordering problem.
Cyclic area match tolerance = 0.0001 patch: cyclic

From function cyclicFvPatch::makeWeights(scalarField& w) const
in file fvMesh/fvPatches/constraint/cyclic/cyclicFvPatch.C at line 88.

FOAM aborting
CheckMesh outputs:

Quote:
Mesh stats
points: 32916
faces: 94280
internal faces: 89080
cells: 30720
boundary patches: 4
point zones: 0
face zones: 0
cell zones: 0

Number of cells of each type:
hexahedra: 29760
prisms: 960
wedges: 0
pyramids: 0
tet wedges: 0
tetrahedra: 0
polyhedra: 0

Checking topology...
Boundary definition OK.
Point usage OK.
Upper triangular ordering OK.
Face vertices OK.
Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface topology
piston 1128 1176 ok (non-closed singly connected)
liner 648 700 ok (non-closed singly connected)
cylinderHead 864 901 ok (non-closed singly connected)
cyclic 2560 2671 ok (non-closed singly connected)

Checking geometry...
This is a 3-D mesh
Overall domain bounding box (0 0 1e-05) (0.048 0.0375279 0.127133)
Mesh (non-empty) directions (1 1 1)
Mesh (non-empty, non-wedge) dimensions 3
Boundary openness (-3.17244e-19 6.45817e-19 9.97555e-20) Threshold = 1e-06 OK.
Max cell openness = 7.87416e-16 OK.
Max aspect ratio = 171.191 OK.
Minumum face area = 2.26276e-08. Maximum face area = 7.1519e-06. Face area magnitudes OK.
Min volume = 1.49285e-11. Max volume = 1.1858e-08. Total volume = 0.0001209. Cell volumes OK.
Mesh non-orthogonality Max: 47.1821 average: 4.3299 Threshold = 70
Non-orthogonality check OK.
Face pyramids OK.
Max skewness = 0.966463 OK.

Mesh OK.


Is there any chance to manipulte the mesh ?
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Old   September 30, 2009, 06:53
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Ok, i solved the problem in

$FOAM_DIR/etc/controlDict

cyclicMatchTol 1e-4; to

cyclicMatchTol 1e-2;

Now foamToVTK runs.
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