Preparing CAD Parts for Directed Meshing

This section provides information on preparing CAD parts for directed meshing.

You can either import CAD geometry, or create geometry using the 3D-CAD modeler. Directed meshing operations use the latest description produced by any surface preparation operation, Boolean operation, or the root description. See Mesh Descriptions.

The following requirements must be met regardless of the sources used on the geometry parts:

• Each part must have a regular section profile along its length.

• Each part must have at least three surfaces, representing the source, target, and guide surfaces.

  If necessary, you can subdivide any part into the necessary surfaces using the split by angle or split by patch options (1-1 directed meshing only).

• A logically rectangular guide surface with five or more CAD edges is allowed.

  Include CAD vertices in the distribution path even if the distribution does not land on those points. Directed meshing smooths over any CAD vertices that are not designated as a feature.

  注	In cases where there is a dramatic bending of the sweep path, there may be a requirement to manually create four-sided guide surfaces in order to ensure the part is meshed successfully.

• Imprint contacting parts on each other and ensure that part contacts are correctly defined on each part.

  Use the CAD-based imprinter under Parts, or ensure that imprinting is active for features in the 3D-CAD modeler. Do not use the surface repair imprinter or the discrete imprinter under Parts as doing so disassociates the CAD from the surface.

  注	Changing a 3D-CAD model whose parts are used in a directed mesh operation can result in the directed mesh operation becoming invalid. In this case, apply an update and review the settings in the directed mesh operation.