Axisymmetric wedge "Cannot find opposite wedge"

j.lisanti · February 17, 2013, 13:58

Hello.
I am attempting to mesh a 5 deg wedge of a cylinder in ICEM CFD and convert it to OpenFOAM format using fluent3DMeshToFoam. When I do this and adjust the appropriate boundary conditions and run checkMesh I get the following during the geometry check:

Checking geometry...
Overall domain bounding box (-20 -2.44696e-15 -0.177269) (0 4.064 0.177269)
Mesh (non-empty, non-wedge) directions (1 1 0)
Mesh (non-empty) directions (1 1 1)
Wedge FRONT with angle 2.5 degrees
***Cannot find opposite wedge for wedge FRONT
Boundary openness (4.62186e-18 -1.66095e-16 -2.69112e-14) OK.
Max cell openness = 3.09836e-16 OK.
Max aspect ratio = 6.69061 OK.
Minumum face area = 5.62568e-06. Maximum face area = 1.28406. Face area magnitudes OK.
Min volume = 1.07578e-08. Max volume = 0.0697424. Total volume = 13.247. Cell volumes OK.
Mesh non-orthogonality Max: 79.5003 average: 16.8294
*Number of severely non-orthogonal faces: 30.
Non-orthogonality check OK.
<<Writing 30 non-orthogonal faces to set nonOrthoFaces
Face pyramids OK.
Max skewness = 1.47 OK.
Coupled point location match (average 0) OK.

Failed 1 mesh checks.

I am unable to resolve this issue. Thank you in advanced for any assistance you may be able to provide. I look forward to contributing to this forum.

I am happy to provide additional details if necessary.

Henning86 · March 25, 2013, 09:00

have you tried?

Code:

collapseEdges 1e-8 179

Im interested in building axisymmetric "3D" (1 cell thick) meshes in Fluent because i have some difficulties with makeAxialMesh.

camille131 · April 1, 2013, 14:05

I had the same error message and then I put front in one patch and back in another. that whas my problem.

Don't you have a back patch? symmetric to your FRONT?

j.lisanti · April 1, 2013, 14:14

The problem was that I had some asymmetric cells. Thank you for the responses!

v_scientist · May 24, 2013, 04:53

I am also having same error . what kind of asymmetrical patches did u have ? & how do U recognise them. I have also tried for check mesh . It shows :

***Cannot find opposite wedge for wedge front

mesh failed . please guide me I am new to OF

HosamAlrefaie · July 7, 2021, 08:29

I had the same error, I solved it by making the thickness of the mesh to be one cell only between the two Wedges, this according to the guide
https://www.openfoam.com/documentati...int-wedge.html

February 17, 2013, 13:58	Axisymmetric wedge "Cannot find opposite wedge"	#1
j.lisanti New Member Joel C Lisanti Join Date: Feb 2013 Posts: 5 Rep Power: 13	Hello. I am attempting to mesh a 5 deg wedge of a cylinder in ICEM CFD and convert it to OpenFOAM format using fluent3DMeshToFoam. When I do this and adjust the appropriate boundary conditions and run checkMesh I get the following during the geometry check: Checking geometry... Overall domain bounding box (-20 -2.44696e-15 -0.177269) (0 4.064 0.177269) Mesh (non-empty, non-wedge) directions (1 1 0) Mesh (non-empty) directions (1 1 1) Wedge FRONT with angle 2.5 degrees **Cannot find opposite wedge for wedge FRONT Boundary openness (4.62186e-18 -1.66095e-16 -2.69112e-14) OK. Max cell openness = 3.09836e-16 OK. Max aspect ratio = 6.69061 OK. Minumum face area = 5.62568e-06. Maximum face area = 1.28406. Face area magnitudes OK. Min volume = 1.07578e-08. Max volume = 0.0697424. Total volume = 13.247. Cell volumes OK. Mesh non-orthogonality Max: 79.5003 average: 16.8294 Number of severely non-orthogonal faces: 30. Non-orthogonality check OK. <<Writing 30 non-orthogonal faces to set nonOrthoFaces Face pyramids OK. Max skewness = 1.47 OK. Coupled point location match (average 0) OK. Failed 1 mesh checks. I am unable to resolve this issue. Thank you in advanced for any assistance you may be able to provide. I look forward to contributing to this forum. I am happy to provide additional details if necessary.

March 25, 2013, 09:00		#2
Henning86 Member Join Date: Nov 2012 Posts: 83 Rep Power: 13	have you tried? Code: collapseEdges 1e-8 179 Im interested in building axisymmetric "3D" (1 cell thick) meshes in Fluent because i have some difficulties with makeAxialMesh.

May 24, 2013, 04:53	same error	#5
v_scientist New Member vinita Join Date: Dec 2012 Posts: 6 Rep Power: 13	I am also having same error . what kind of asymmetrical patches did u have ? & how do U recognise them. I have also tried for check mesh . It shows : ***Cannot find opposite wedge for wedge front mesh failed . please guide me I am new to OF

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April 1, 2013, 14:05		#3
camille131 Member Camille Join Date: Oct 2012 Posts: 54 Rep Power: 13	I had the same error message and then I put front in one patch and back in another. that whas my problem. Don't you have a back patch? symmetric to your FRONT?

April 1, 2013, 14:14		#4
j.lisanti New Member Joel C Lisanti Join Date: Feb 2013 Posts: 5 Rep Power: 13	The problem was that I had some asymmetric cells. Thank you for the responses!

July 7, 2021, 08:29		#6
HosamAlrefaie New Member Hosam Alrefaie Join Date: Jul 2021 Posts: 24 Rep Power: 4	I had the same error, I solved it by making the thickness of the mesh to be one cell only between the two Wedges, this according to the guide https://www.openfoam.com/documentati...int-wedge.html