11.2.1. Associating CAD Objects in TurboGrid’s Geometry Workspace

This section describes how to set up secondary flow path geometry in TurboGrid using the Geometry workspace.

With the CAD geometry already loaded into TurboGrid, you can specify the geometry for each secondary flow path as follows:

  1. In the Geometry workspace tree, right-click Topological Entity Instances > Secondary Flow Paths and select Insert Secondary Passage.

    The Create New Secondary Passage Topology dialog box appears.

  2. Enter a name for the secondary flow path and click OK.

    A new, incomplete, secondary flow path object appears in the tree under Secondary Flow Paths. This object requires boundary entity definitions.

  3. Define boundary entities to complete the secondary flow path object using one or both of the following procedures:

    Create a boundary entity and then assign it one or more CAD objects

    1. Right-click the new secondary flow path object and select Insert Secondary Passage Boundary.

      The Create New Secondary Passage Boundary dialog box appears.

    2. Enter a name for a new boundary entity for the secondary flow path object and click OK.

      A new, incomplete, boundary entity appears in the tree under the secondary flow path object that is being defined. This boundary entity requires an association with a curvilinear line selected from the CAD Families branch.

    3. Assign CAD objects to the boundary entity using either or both of the following methods:

      • Preferred Method — Open the boundary entity in the object editor, then make CAD assignments:

        • By using the CAD Entity Selector   icon (beside the Location field) to open the CAD Region Entities dialog box, which you can use to select CAD objects, and/or

        • By typing a comma-delimited list of CAD object names into the Location field.

      • Alternative Method — Right-click one CAD object (or optionally a selection of multiple CAD objects made using Shift/Ctrl) and select Assign [Family | Families | Geometry Only] To Topology Instance > [Name of the secondary flow path object that has an incomplete boundary entity] > [Name of the incomplete boundary entity that requires an association with the CAD object(s)].

    Create a boundary entity directly from a CAD object

    1. Right-click a CAD family (a high-level item listed directly under CAD Families) and select Create Entity and Assign Family > [Name of the secondary flow path object that requires a new boundary entity].

      The Create New Secondary Passage Boundary dialog box appears.

    2. Enter a name for a new boundary entity for the secondary flow path object that is being defined and click OK.

      A new, complete, boundary entity is created and appears in the tree under the secondary flow path object that you chose in the previous step. This boundary entity is associated with the CAD family that you right-clicked in the previous step.

Note:  CAD objects include families and their constituent primitives. If you assign a CAD family to a boundary entity, the entire family is associated with the boundary entity. Any upstream geometry updates to the family will be propagated to the assigned topological entity. If you assign a selection of CAD primitives (curves or surfaces) to a boundary entity, the family association will be lost and only the specified primitives will be maintained during upstream geometry updates.

This also applies for all other topological entities.