[blockMesh] Trouble with MergePatchPairs: Duplicate Point Found in Cut Face

dancfd · August 31, 2010, 23:13

Good evening all,

I am trying to produce an airfoil with a flap with overlapping geometry but are separate patches (so that they can rotate relative to each other). To test this, I have attempted to create a mesh with some overlap, however I am given the following error when I run blockMesh:

Code:

...
Adding point and face zones
Creating attachPolyTopoChanger


--> FOAM FATAL ERROR: 
Duplicate point found in cut face. Error in the face cutting algorithm for global face 4(97410 97428 97430 97412) local face 4(151 150 152 153)
Slave size: 250 Master size: 90 index: 74.
Face: 
41
(
97411
97429
etc

I am unfamiliar with this type of error, and I do not know how to fix this problem. Can anyone suggest a solution? I have attached the blockMeshDict, the log file for the error (though I shortened the lists with "...") and a visual representation of the mesh (this shows the . I would appreciate any help that could be offered.

Regards,

Dan

MartinB · September 1, 2010, 00:02

Sorry, false alarm by me... first block is fine... problem is somewhere else...

Martin

sasanghomi · March 24, 2013, 14:25

Quote:

Originally Posted by dancfd

Good evening all,

I am trying to produce an airfoil with a flap with overlapping geometry but are separate patches (so that they can rotate relative to each other). To test this, I have attempted to create a mesh with some overlap, however I am given the following error when I run blockMesh:

Code:

...
Adding point and face zones
Creating attachPolyTopoChanger


--> FOAM FATAL ERROR: 
Duplicate point found in cut face. Error in the face cutting algorithm for global face 4(97410 97428 97430 97412) local face 4(151 150 152 153)
Slave size: 250 Master size: 90 index: 74.
Face: 
41
(
97411
97429
etc

I am unfamiliar with this type of error, and I do not know how to fix this problem. Can anyone suggest a solution? I have attached the blockMeshDict, the log file for the error (though I shortened the lists with "...") and a visual representation of the mesh (this shows the . I would appreciate any help that could be offered.

Regards,

Dan

Hi Daniel

Did you find the origin of this error?
I have a same error for engine simulation (sliding interface for valves)...
How can I fix this error?

Thanks and best regards,
Sasan.

dancfd · March 24, 2013, 17:26

Hello Sasan,

Unfortunately not; I had to remove the oscillating flap from the scope of my project.

Best of luck.

Dan

vonboett · March 13, 2014, 04:01

I have the same error with stitch mesh. Check mesh is OK. Any hints?

September 1, 2010, 00:02		#2
MartinB Senior Member Martin Join Date: Oct 2009 Location: Aachen, Germany Posts: 255 Rep Power: 22	Sorry, false alarm by me... first block is fine... problem is somewhere else... Martin Last edited by MartinB; September 1, 2010 at 00:15. Reason: Misinterpretation by me...

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March 24, 2013, 17:26		#4
dancfd Senior Member Daniel Join Date: Jul 2009 Location: Montreal, Canada Posts: 156 Rep Power: 17	Hello Sasan, Unfortunately not; I had to remove the oscillating flap from the scope of my project. Best of luck. Dan

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