||September 24, 2012 09:03
nonManifoldPoints using snappyHexMesh
i am using snappyHexMEsh to mesh a complex geometry. I am doing some test, varying the number of cells of the backgroud mesh, to see which discretization is better for my simulation. In same cases, when the meshing process is finished, checkMesh returns a nonManifoldPoints warning like the one below
internal faces: 5603097
boundary patches: 7
point zones: 0
face zones: 0
cell zones: 0
Overall number of cells of each type:
tet wedges: 0
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
left 23766 25072 ok (non-closed singly connected)
right 22929 24290 ok (non-closed singly connected)
top 5476 5625 ok (non-closed singly connected)
bottom 17704 18749 ok (non-closed singly connected)
front 22057 23326 ok (non-closed singly connected)
back 23799 25100 ok (non-closed singly connected)
square_CreatedbyGmsh890688 890541 multiply connected (shared edge)
<<Writing 10 conflicting points to set nonManifoldPoints
Overall domain bounding box (0.001 0.001 0.001) (0.023 0.03 0.023)
Mesh (non-empty, non-wedge) directions (1 1 1)
Mesh (non-empty) directions (1 1 1)
Boundary openness (9.0038e-14 6.34549e-14 3.07148e-15) OK.
Max cell openness = 2.23352e-16 OK.
Max aspect ratio = 1.00626 OK.
Minumum face area = 2.2082e-08. Maximum face area = 8.88927e-08. Face area magnitudes OK.
Min volume = 3.29904e-12. Max volume = 2.64278e-11. Total volume = 7.18693e-06. Cell volumes OK.
Mesh non-orthogonality Max: 25.3111 average: 3.25383
Non-orthogonality check OK.
Face pyramids OK.
Max skewness = 0.333842 OK.
Is there a way to avoid or to fix this issue? Does OF complain about that during the simulation? (at the moment i have not tried yet to run a simulation)
I am using OF 2.1.0, but i have also tried 1.7.1 and got the same error.