[ANSYS Meshing] Patch-conforming tetrahedron mesh failed - edge intersection in the boundary mesh

Mohamed_Selim · March 11, 2018, 13:40

Hi,

I am getting the Error:
"Patch-conforming tetrahedron mesh failed because of an edge intersection in the boundary mesh". Please see the attached images. Image 1 shows the geometry that I am trying to mesh. It is a Shell & Tube heat exchanger. Image 2 shows where I am getting the intersection error.

I tried to reduce the mesh size at the front and rear faces, but it did not help. I tried many different mesh sizes and created Face Sizing for all tubes, but I am still getting the same error! every time the intersection point moves from one tube to another.

I reduced the Max Face/Tet size, it did not help. I also tried to do Mesh Match Control between the front/rear large circle and the each of the tubes circles, it did not solve the problem.

Any help would be appreciated.

sunilpatil · March 12, 2019, 01:21

Hi,
Have you solved this problem?

Mohamed_Selim · March 12, 2019, 16:05

Hi Sunil,

The only way I could solve this problem was by generating hexa (rectangular) mesh for the inner tubes. I think this improves the interface between tubes and shell. Try to avoid using triangular mesh if possible at the interfaces.

Good luck

sunilpatil · March 18, 2019, 22:44

Hi, thanks for your reply

March 12, 2019, 01:21		#2
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 14	Hi, Have you solved this problem? __________________ Regards, Sunil

March 18, 2019, 22:44		#4
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 14	Hi, thanks for your reply __________________ Regards, Sunil

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March 12, 2019, 16:05		#3
Mohamed_Selim New Member Mohamed Selim Join Date: Mar 2014 Posts: 3 Rep Power: 12	Hi Sunil, The only way I could solve this problem was by generating hexa (rectangular) mesh for the inner tubes. I think this improves the interface between tubes and shell. Try to avoid using triangular mesh if possible at the interfaces. Good luck