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-   -   weird looking yPlus graph (http://www.cfd-online.com/Forums/openfoam/105980-weird-looking-yplus-graph.html)

rob3rt 0ng August 14, 2012 09:54

weird looking yPlus graph
 
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Hi All,

I run a k-omega SST incompressible flow past a hemisphere (generated from setSet utility). I normally get the y+ values from the display screen, and a bit puzzled when see this graph. Could you suggest whether this make sense?

Here's my checkMesh results:
PHP Code:

Mesh stats
    points
:           1084753
    faces
:            2854735
    internal faces
:   2821055
    cells
:            885214
    boundary patches
5
    point zones
:      0
    face zones
:       0
    cell zones
:       2

Overall number of cells of each type
:
    
hexahedra:     776644
    prisms
:        0
    wedges
:        0
    pyramids
:      0
    tet wedges
:    0
    tetrahedra
:    0
    polyhedra
:     108570

Checking topology
...
    
Boundary definition OK.
    
Point usage OK.
    
Upper triangular ordering OK.
    
Topological cell zip-up check OK.
    
Face vertices OK.
    
Face-face connectivity OK.
    
Number of regions(OK).

Checking patch topology for multiply connected surfaces ...
    
Patch               Faces    Points   Surface topology                  
    openwater           12800    13122    ok 
(non-closed singly connected)  
    
seafloor            6480     7031     ok (non-closed singly connected)  
    
watersurface        4800     4941     ok (non-closed singly connected)  
    
inlet               4800     4941     ok (non-closed singly connected)  
    
outlet              4800     4941     ok (non-closed singly connected)  

Checking geometry...
    
Overall domain bounding box (-0.2 -0.0249 -0.2) (0.2 0.1 0.25)
    
Mesh (non-empty, non-wedgedirections (1 1 1)
    
Mesh (non-empty) directions (1 1 1)
    
Boundary openness (-3.58035e-17 3.94272e-15 -6.20997e-17OK.
    
Max cell openness 3.11701e-16 OK.
    
Max aspect ratio 22.2347 OK.
    
Minumum face area 2.63529e-08Maximum face area 3.75002e-05.  Face area magnitudes OK.
    
Min volume 2.19607e-11Max volume 1.68703e-07.  Total volume 0.022482.  Cell volumes OK.
    
Mesh non-orthogonality Max84.1114 average9.80152
   
*Number of severely non-orthogonal faces7060.
    Non
-orthogonality check OK.
  <<
Writing 7060 non-orthogonal faces to set nonOrthoFaces
    Face pyramids OK
.
    
Max skewness 0.341033 OK.

Mesh OK.

End 

Regards,
Robert


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