Why do internal walls meshed in ICEM have a strange appearance when imported into CFX-Pre?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.
Tagged: 17.2, fluid-dynamics, General, icem-cfd
March 17, 2023 at 8:58 amFAQParticipant
CFX requires a separate sets of mesh faces on each side of a 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, element faces from one side of the surface are attributed to the wrong 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 to a side. If a mesh file is now written, it should appear as expected when imported into CFX-Pre.
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