CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Meshing Format & General Technical (http://www.cfd-online.com/Forums/openfoam-meshing-technical/)
-   -   Questoion about nonMainfoldPoint and nonOrthoFaces (http://www.cfd-online.com/Forums/openfoam-meshing-technical/119758-questoion-about-nonmainfoldpoint-nonorthofaces.html)

File June 24, 2013 10:47

Questoion about nonMainfoldPoint and nonOrthoFaces
 
Hello,

I created a mesh with Avizo and then used Gmsh and enGrid to transform it to OpenFoam. When I try to run my case with this mesh it always fail but it works with other meshes. Therefore it is reasonable to assume that the problem is somewhere in the mesh

check Mesh writes Mesh OK, but I am concerned about nonMainfoldPoint and nonOrthoFaces which occur in my polyMesh folder. I cannot find any documentation regarding this topic so if somebody could tell me what to do or where to look for an answer


check Mesh gives output like

Code:

/*---------------------------------------------------------------------------*\
| =========                |                                                |
| \\      /  F ield        | OpenFOAM: The Open Source CFD Toolbox          |
|  \\    /  O peration    | Version:  2.2.0                                |
|  \\  /    A nd          | Web:      www.OpenFOAM.org                      |
|    \\/    M anipulation  |                                                |
\*---------------------------------------------------------------------------*/
Build  : 2.2.0-5be49240882f
Exec  : checkMesh
Date  : Jun 24 2013
Time  : 16:29:00
Host  : "zeus"
PID    : 7719
Case  : /home/filip/OpenFOAM/proba/moje_2
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Disallowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create polyMesh for time = 0

Time = 0

Mesh stats
    points:          95290
    faces:            947476
    internal faces:  875052
    cells:            455632
    faces per cell:  4
    boundary patches: 3
    point zones:      0
    face zones:      0
    cell zones:      0

Overall number of cells of each type:
    hexahedra:    0
    prisms:        0
    wedges:        0
    pyramids:      0
    tet wedges:    0
    tetrahedra:    455632
    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: 4
    The mesh has multiple regions which are not connected by any face.
  <<Writing region information to "0/cellToRegion"

Checking patch topology for multiply connected surfaces...
    Patch              Faces    Points  Surface topology                 
    Inlet              1966    1143    ok (non-closed singly connected) 
    Outlet              1962    1132    ok (non-closed singly connected) 
    wall                68496    34516    multiply connected (shared edge) 
  <<Writing 8 conflicting points to set nonManifoldPoints

Checking geometry...
    Overall domain bounding box (-5.2703e-07 -5.57384e-07 -5.82047e-07) (0.00141052 0.0014106 0.00141059)
    Mesh (non-empty, non-wedge) directions (1 1 1)
    Mesh (non-empty) directions (1 1 1)
    Boundary openness (1.4271e-17 4.92582e-17 -2.06799e-17) OK.
    Max cell openness = 2.7799e-16 OK.
    Max aspect ratio = 15.936 OK.
    Minimum face area = 1.72258e-11. Maximum face area = 1.07184e-09.  Face area magnitudes OK.
    Min volume = 5.78296e-17. Max volume = 1.01736e-14.  Total volume = 6.68254e-10.  Cell volumes OK.
    Mesh non-orthogonality Max: 78.3513 average: 21.5589
  *Number of severely non-orthogonal faces: 6.
    Non-orthogonality check OK.
  <<Writing 6 non-orthogonal faces to set nonOrthoFaces
    Face pyramids OK.
    Max skewness = 3.02936 OK.
    Coupled point location match (average 0) OK.

Mesh OK.

End

Regards
Filip


All times are GMT -4. The time now is 04:49.