CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Meshing & Mesh Conversion

Failed checkMesh - ICEM converted mesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 27, 2013, 06:32
Default Failed checkMesh - ICEM converted mesh
  #1
New Member
 
Eleanor Rajaratnam
Join Date: Nov 2013
Posts: 14
Rep Power: 2
elebelly is on a distinguished road
Hi, I just converted my mesh (created on ICEM) however when I run the checkMesh command, it results in:

Checking geometry...
Overall domain bounding box (-11996.5928 -12000 -399.9727429) (20000 12000 399.9727429)
Mesh (non-empty, non-wedge) directions (1 1 0)
Mesh (non-empty) directions (1 1 0)
All edges aligned with or perpendicular to non-empty directions.
Boundary openness (-4.626143897e-18 -4.831227775e-18 -5.071408981e-19) OK.
***High aspect ratio cells found, Max aspect ratio: 11533.97369, number of cells 25089
<<Writing 25089 cells with high aspect ratio to set highAspectRatioCells
Minimum face area = 1.243221387e-05. Maximum face area = 303119.0509. Face area magnitudes OK.
Min volume = 0.009945093367. Max volume = 65443544.43. Total volume = 5.648098245e+11. Cell volumes OK.
Mesh non-orthogonality Max: 86.68018587 average: 9.268946233
*Number of severely non-orthogonal faces: 267.
Non-orthogonality check OK.
<<Writing 267 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 0.9275708721 OK.
Coupled point location match (average 0) OK.

Failed 1 mesh checks.

End

Why has it failed? And what can be done to resolve this?

Any help is really appreciated,

Ele
elebelly is offline   Reply With Quote

Old   November 27, 2013, 07:44
Default Simple Solution
  #2
Member
 
B T KANNAN
Join Date: Jul 2011
Location: CHENNAI (MADRAS), INDIA
Posts: 54
Rep Power: 5
skyinventorbt is on a distinguished road
Quote:
Originally Posted by elebelly View Post
Hi, I just converted my mesh (created on ICEM) however when I run the checkMesh command, it results in:

Checking geometry...
Overall domain bounding box (-11996.5928 -12000 -399.9727429) (20000 12000 399.9727429)
Mesh (non-empty, non-wedge) directions (1 1 0)
Mesh (non-empty) directions (1 1 0)
All edges aligned with or perpendicular to non-empty directions.
Boundary openness (-4.626143897e-18 -4.831227775e-18 -5.071408981e-19) OK.
***High aspect ratio cells found, Max aspect ratio: 11533.97369, number of cells 25089
<<Writing 25089 cells with high aspect ratio to set highAspectRatioCells
Minimum face area = 1.243221387e-05. Maximum face area = 303119.0509. Face area magnitudes OK.
Min volume = 0.009945093367. Max volume = 65443544.43. Total volume = 5.648098245e+11. Cell volumes OK.
Mesh non-orthogonality Max: 86.68018587 average: 9.268946233
*Number of severely non-orthogonal faces: 267.
Non-orthogonality check OK.
<<Writing 267 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 0.9275708721 OK.
Coupled point location match (average 0) OK.

Failed 1 mesh checks.

End

Why has it failed? And what can be done to resolve this?

Any help is really appreciated,

Ele
Dear Ele,

"Try to increase the number of cells or reduce the grading" to avoid aspect ratio error.

--
KANNAN
skyinventorbt is offline   Reply With Quote

Old   December 11, 2013, 02:53
Default
  #3
Member
 
Thangam Natarajan
Join Date: Dec 2010
Location: Perth
Posts: 41
Rep Power: 6
Thangam is on a distinguished road
Hi,

After the checkMesh, you could use foamToVTK utility to visualize all the non ortho faces and the high aspect ratio cells in paraview. In your case, run the command foamToVTK -faceSet highAspectRatioCells and this will create a VTK folder (which has the .VTK file) in your case directory which can then be visualized in paraview to see the cells containing high aspect ratio and you could rework/correct your geometry in ICEM if you want.(atleast you would know where the bad cells are!). You can repeat this for the non ortho faces as well.

good luck.
Thangam is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to set periodic boundary conditions Ganesh FLUENT 13 January 22, 2014 04:11
cgnsToFoam error when converting ICEM mesh glasenapp OpenFOAM Meshing & Mesh Conversion 4 May 17, 2013 12:46
Unstructured Mesh ICEM on a cube jerome_ ANSYS 0 May 30, 2012 05:34
Boddy fitted Hexcore Mesh in ICEM Cfd Mitch CFX 0 December 29, 2008 06:07
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 14:09


All times are GMT -4. The time now is 11:56.