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

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Old   March 11, 2018, 12:40
Default Patch-conforming tetrahedron mesh failed - edge intersection in the boundary mesh
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Mohamed Selim
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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.
Attached Images
File Type: jpg Mesh 1.jpg (118.3 KB, 82 views)
File Type: jpg Mesh 2 - Problematic Geometry.jpg (113.1 KB, 75 views)
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Old   March 12, 2019, 00:21
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sunil
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Hi,
Have you solved this problem?
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Old   March 12, 2019, 15:05
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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
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Old   March 18, 2019, 21:44
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Hi, thanks for your reply
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