[VentinS]

Hi everyone,
I have a Mesh which has different kind of grids: the structured and there is some unstructured parts.

When I try to convert the mesh, everything goes fine, but the checkMesh fails 2 checks.
It seems, that there are some open Cells in this "intersection".

Is there any possibility to patch this?


this is the checkMesh response:


Create time

Create polyMesh for time = 0

Time = 0

Mesh stats
points: 1368793
faces: 4929396
internal faces: 4794724
cells: 1823654
faces per cell: 5.33222
boundary patches: 15
point zones: 0
face zones: 4
cell zones: 4

Overall number of cells of each type:
hexahedra: 1194739
prisms: 0
wedges: 0
pyramids: 23181
tet wedges: 0
tetrahedra: 588889
polyhedra: 16845
Breakdown of polyhedra by number of faces:
faces number of cells
5 16845

Checking topology...
Boundary definition OK.
Cell to face addressing OK.
Point usage OK.
Upper triangular ordering OK.
Face vertices OK.
*Number of regions: 5
The mesh has multiple regions which are not connected by any face.
<<Writing region information to "0/cellToRegion"
<<Writing region 0 with 296709 cells to cellSet region0
<<Writing region 1 with 315361 cells to cellSet region1
<<Writing region 2 with 1008832 cells to cellSet region2
<<Writing region 3 with 101376 cells to cellSet region3
<<Writing region 4 with 101376 cells to cellSet region4

Checking patch topology for multiply connected surfaces...
Patch Faces Points Surface topology
OUTLET_UNTEN 6120 6290 ok (non-closed singly connected)
INLET_UNTEN 6120 6290 ok (non-closed singly connected)
INLET 3168 3241 ok (non-closed singly connected)
OUTLET 3168 3241 ok (non-closed singly connected)
DISH 26704 26932 ok (non-closed singly connected)
S_FLAECHE 16888 17409 ok (non-closed singly connected)
INLET_OBEN 4608 4752 ok (non-closed singly connected)
INLET_UNSTRUCTERED 7166 3740 ok (non-closed singly connected)
OUTLET_OBEN 4608 4752 ok (non-closed singly connected)
OUTLET_UNSTRUCTURED 7204 3759 ok (non-closed singly connected)
IN-INT1 6336 3241 multiply connected (shared edge)
IN-INT2 8630 8692 multiply connected (shared edge)
OUT-INT2 8296 8352 multiply connected (shared edge)
OUT-INT1 6336 3241 multiply connected (shared edge)
SURFS 19320 19897 ok (non-closed singly connected)
<<Writing 6551 conflicting points to set nonManifoldPoints

Checking geometry...
Overall domain bounding box (-0.01775 2.5e-05 -0.004) (0.01775 0.018025 0.004)
Mesh has 3 geometric (non-empty/wedge) directions (1 1 1)
Mesh has 3 solution (non-empty) directions (1 1 1)
***Boundary openness (2.82431e-06 -6.98109e-07 2.86331e-07) possible hole in boundary description.
***Open cells found, max cell openness: 0.719538, number of open cells 16845
<<Writing 16845 non closed cells to set nonClosedCells
Minimum face area = 3.97624e-13. Maximum face area = 1.13676e-07. Face area magnitudes OK.
Min volume = 2.91583e-19. Max volume = 1.07276e-11. Total volume = 5.62536e-07. Cell volumes OK.
Mesh non-orthogonality Max: 86.021 average: 24.1218
*Number of severely non-orthogonal (> 70 degrees) faces: 7902.
Non-orthogonality check OK.
<<Writing 7902 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 2.51785 OK.
Coupled point location match (average 0) OK.

Failed 2 mesh checks.

End



------------------------

[mwaqas]

Hello Ventins,


I don't think so, it has anything to do with mesh conversion. Improve your mesh quality in your mesh generating tool. Also, you have pretty high mesh non-orthogonality. Even, if you don't get any problem with open faces. You might face problems due to high non-orthogonality.

[VentinS]

Thank you, very much for your reply! I'll try to improve the mesh.
And while I'm at it, I should get rid of those internal walls