Troubleshooting the Thin Meshers

Multiple Boundaries in a Thin Geometry

Prism cells are not created on boundary surfaces when there is more than one boundary in a thin portion of geometry. Instead, prism layers are created inside the volume which avoids confusion between prism layers that belong to different boundaries.

To view the internal prism layers, take a cross section of the geometry.

If you want to maintain prism layers on the two boundaries in the thin portion of the geometry, either:

• Activate per-part meshing, or
• Create a separate mesh operation for the thin portion that has two boundaries. For this mesh operation, select the prism layer mesher along with a volume meshing model that is not thin.
  
  
  
  

  Using a separate mesh operation creates non-conformal mesh at the interface.

Collapsed Prism Cells at Thin-Thin Interface

When the side of a thin mesh meets the long edge of a thin mesh at an interface, the prism layers in the thin mesh can collapse on one side of the interface. View the internal volume mesh using a cross section.

To overcome this issue and produce a better quality mesh, either:

• specify smaller surface size locally on the interface,
• or, select a non-thin volume mesher along with the prism layer mesher for one of the thin parts.
  
  
  
  

  Using a separate mesh operation creates non-conformal mesh at the interface.

Corrupted Cells at Sharp Angles

When using the Thin mesher with the Polyhedral mesher, geometry with sharp angles which deviate more than 45 degrees (convex or concave) from a plane surface within a part can unexpectedly cause corrupted cells in the mesh.

To reduce the possibility of creating corrupted cells, avoid sharp angles in thin parts where possible. Where sharp angles are necessary in thin parts, refine the surface near the sharp angles.