CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Community Contributions

[cfMesh] improveMeshQuality

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 30, 2017, 01:49
Default improveMeshQuality
  #1
Senior Member
 
M. C.
Join Date: May 2013
Location: Italy
Posts: 286
Blog Entries: 6
Rep Power: 15
student666 is on a distinguished road
Hi all,

currently I'm using cfMesh as meshing tool.
I found out the
Code:
improveMeshQuality
command, but I use it with default settings.

Code:
Default number of loops is 10
Default number of iterations is 50
Default number of surface iterations is 2
Using default quality threshold 0.1
No constraints applied on the smoothing procedure
With default settings, my feeling is that cfMesh tends to reduce the skewness of the faces, but generally non orthogonality increases, is it right?

Now I would like to ask if it is possibile to set it up to work on specific errors that arise with the
Code:
checkMesh
utility and if someone can share her/his experience with this option.

e.g. If checkMesh shows a huge non-ortogonality value (> 80) I would like to make
Code:
improveMeshQuality
work to reduce mainly this parameter.

This is a checkMesh after a single run with cartesianMesh
Code:
    Overall domain bounding box (-4.43393e-012 0.3235 -0.225969) (0.25 1.012 0.318)
    Mesh (non-empty, non-wedge) directions (1 1 1)
    Mesh (non-empty) directions (1 1 1)
    Boundary openness (-9.98583e-015 2.23961e-015 9.44861e-016) OK.
    Max cell openness = 8.63145e-016 OK.
    Max aspect ratio = 139.552 OK.
    Minimum face area = 2.08953e-009. Maximum face area = 2.05036e-005.  Face area magnitudes OK.
    Min volume = 4.11405e-013. Max volume = 5.75174e-008.  Total volume = 0.0601205.  Cell volumes OK.
    Mesh non-orthogonality Max: 88.6164 average: 6.16081
   *Number of severely non-orthogonal (> 70 degrees) faces: 407.
    Non-orthogonality check OK.
  <<Writing 407 non-orthogonal faces to set nonOrthoFaces
    Face pyramids OK.
Average skewness 0.0461554
 ***Max skewness = 5.73023, 266 highly skew faces detected which may impair the quality of the results
  <<Writing 266 skew faces to set skewFaces
    Coupled point location match (average 0) OK.
this is a first checkMesh output after improveMeshQuality has been run
Code:
Checking geometry...
    Overall domain bounding box (-4.43393e-012 0.3235 -0.225969) (0.25 1.012 0.318)
    Mesh (non-empty, non-wedge) directions (1 1 1)
    Mesh (non-empty) directions (1 1 1)
    Boundary openness (-1.03912e-014 2.23071e-015 9.15085e-016) OK.
    Max cell openness = 1.44747e-015 OK.
    Max aspect ratio = 55.296 OK.
    Minimum face area = 1.8092e-009. Maximum face area = 2.05036e-005.  Face area magnitudes OK.
    Min volume = 7.42452e-014. Max volume = 5.12649e-008.  Total volume = 0.0601206.  Cell volumes OK.
    Mesh non-orthogonality Max: 86.0757 average: 8.91875
   *Number of severely non-orthogonal (> 70 degrees) faces: 9567.
    Non-orthogonality check OK.
  <<Writing 9567 non-orthogonal faces to set nonOrthoFaces
    Face pyramids OK.
Average skewness 0.0406472
 ***Max skewness = 4.91016, 2 highly skew faces detected which may impair the quality of the results
  <<Writing 2 skew faces to set skewFaces
    Coupled point location match (average 0) OK.
Thanks in advance.

Regards.
student666 is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 23:15.