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-   -   [ANSYS Meshing] Problems with connections/contacts while meshing in Ansys: (https://www.cfd-online.com/Forums/ansys-meshing/191867-problems-connections-contacts-while-meshing-ansys.html)

cfd_worker99 August 22, 2017 16:25

Problems with connections/contacts while meshing in Ansys:
 
I am modeling a helical pipe encased in a solid medium (backfill). The medium is surrounded by soil. The pipe has water inside.
I created a hollow pipe and then imported it to Ansys (SpaceClaim). I then created a cylinder surrounding this pipe and used the merge command to get a cylindrical backfill around this pipe and water (body inside the helical pipe). The backfill is surrounded by cylindrical region of soil.
When I import the model for meshing, multiple contacts are automatically generated. Most of these have unequal number of target to contact faces e.g. Contact 2 has 6 contact faces and 8 target faces. In addition they form overlapping contacts that need to be repaired.
I wanted to avoid these so I decreased the tolerance value of the auto detection in details of contact. I then get lesser contacts but some still need to repair and suppress some.
Once I repair them and import the Mesh to Fluent I get this error message:
Warning: zone of type interior found between different solids!
Material of cell zone 7 is bckfill, while material of cell zone 8 is hdpe.
Warning: zone of type interior found between different solids!
Material of cell zone 7 is bckfill, while material of cell zone 6 is soil.
This will adversely affect the solution.
It is recommended that you fix this issue via the TUI command


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