In some circumstances, a thin surface (internal wall), meshed in ICEM and imported into CFX-Pre have a strange appearance. Some of the surface mesh is visible where it shouldn't be. The attached PNG file shows an example of this, with the surface mesh being visible in the central region.



CFX requires a separate mesh on each side of the thin surface, which ICEM provides automatically when the mesh file is written. In ICEM, the meshes on each side match node for node, but sometimes, some of the element faces on one side of the surface are assigned to the other side of the surface. This can cause problems during the solution, particularly with the radiation solver.

Fortunately this problem has a relatively simple workaround. This can be done as follows:

- Firstly, do not split the faces prior to export.
- Select the 'Edit Mesh' tab in ICEM.
- Select the 'ReOrient Mesh' icon.
- Choose 'Reorient Consistent', selecting any element on the thin surface.

By re-orienting the faces, such that their normals are consistent, the faces will be correctly assigned. If a mesh file is now written, it should appear as expected when imported into CFX-Pre.





Show Form
No comments yet. Be the first to add a comment!