mirror Mesh
 

Dear all

I am trying to mirror a mesh using the utility mirrorMesh. I have checked the mesh with paraview and it seems to be good but when I run checkMesh it gives me 4 errors:

***High aspect ratio cells found, Max aspect ratio: 2.28843e+194, number of cells 1732 (in the original the Max value was 598.682 )

***Number of non-orthogonality errors: 5206.

***Error in face pyramids: 10537 faces are incorrectly oriented.


***Max skewness = 5.73595, 37 highly skew faces detected which may impair the quality of the results

It is quite strange because, as I wrote before, it seems that everything is fine . I have attached the two checkMesh outputs

than you

best regards
Luca


ORIGINAL

Mesh stats
points: 14664271
faces: 43501627
internal faces: 43012943
cells: 14419095
boundary patches: 10
point zones: 0
face zones: 1
cell zones: 1
Overall number of cells of each type:
hexahedra: 14419095
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.
Number of regions: 1 (OK).
Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface topology
GROUND 78105 78848 ok (non-closed singly connected)
SIDE 167895 168784 ok (non-closed singly connected)
SYM 104885 105965 ok (non-closed singly connected)
OUT 18542 18816 ok (non-closed singly connected)
IN 18542 18816 ok (non-closed singly connected)
BASE 10682 10834 ok (non-closed singly connected)
BLUFF_BODY 62128 62574 ok (non-closed singly connected)
BOTTOM 8166 8352 ok (non-closed singly connected)
INTERNAL_SIDE_PLATE 5879 6039 ok (non-closed singly connected)
RAMP 13860 14100 ok (non-closed singly connected)
Checking geometry...
Overall domain bounding box (-19.725 -0.05 -1.75) (27.615 2.38 1.40971e-12)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
Boundary openness (7.5774e-16 1.72823e-15 1.39382e-14) OK.
Max cell openness = 8.33012e-16 OK.
Max aspect ratio = 598.682 OK.
Minumum face area = 2.09408e-07. Maximum face area = 0.14451. Face area magnitudes OK.
Min volume = 2.24371e-10. Max volume = 0.0112077. Total volume = 201.259. Cell volumes OK.
Mesh non-orthogonality Max: 78.6152 average: 18.5406
*Number of severely non-orthogonal faces: 71521.
Non-orthogonality check OK.
<<Writing 71521 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 2.62891 OK.
Coupled point location match (average 0) OK.
Mesh OK.


MIRROR

Mesh stats
points: 29220760
faces: 86898369
internal faces: 86130771
cells: 28838190
boundary patches: 9
point zones: 0
face zones: 0
cell zones: 0
Overall number of cells of each type:
hexahedra: 28838190
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.
Number of regions: 1 (OK).
Checking patch topology for multiply connected surfaces ...
Patch Faces Points Surface topology
GROUND 156210 157080 ok (non-closed singly connected)
SIDE 335790 336952 ok (non-closed singly connected)
OUT 37084 37485 ok (non-closed singly connected)
IN 37084 37485 ok (non-closed singly connected)
BASE 21364 21619 ok (non-closed singly connected)
BLUFF_BODY 124256 124779 ok (non-closed singly connected)
BOTTOM 16332 16621 ok (non-closed singly connected)
INTERNAL_SIDE_PLATE 11758 12078 ok (non-closed singly connected)
RAMP 27720 28059 ok (non-closed singly connected)
Checking geometry...
Overall domain bounding box (-19.725 -0.05 -1.75) (27.615 2.38 1.75)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
Boundary openness (-9.19008e-16 -8.32454e-15 1.31783e-14) OK.
***High aspect ratio cells found, Max aspect ratio: 2.28843e+194, number of cells 1732
<<Writing 1732 cells with high aspect ratio to set highAspectRatioCells
Minumum face area = 1.00424e-07. Maximum face area = 0.14451. Face area magnitudes OK.
Min volume = 2e-300. Max volume = 0.0112077. Total volume = 402.517. Cell volumes OK.
Mesh non-orthogonality Max: 179.521 average: 18.5471
*Number of severely non-orthogonal faces: 143135.
***Number of non-orthogonality errors: 5206.
<<Writing 148341 non-orthogonal faces to set nonOrthoFaces
***Error in face pyramids: 10537 faces are incorrectly oriented.
<<Writing 7063 faces with incorrect orientation to set wrongOrientedFaces
***Max skewness = 5.73595, 37 highly skew faces detected which may impair the quality of the results
<<Writing 37 skew faces to set skewFaces
Coupled point location match (average 0) OK.
Failed 4 mesh checks.