Description
The tools contained in the Goals frame allow you to adjust the quality goals (i.e. quality constraints) and specify the types of surface cells contained in the new unstructured domains.
The Max. Aspect Ratio parameter limits the maximum aspect ratio allowed for the anisotropic cells created by the T-Rex algorithm along the 2D T-Rex boundaries. This parameter has a default value of 10.0. Use the appropriate entry field to specify its numeric value. For more information on how the aspect ratio of a surface cell is computed, please review the description of the Aspect Ratio examine function. Analogously, for more information regarding the involvement of the T-Rex algorithm in the Automatic Surface Mesh functionality, please review the section on the Resolution frame.
Note: Modifying the Max. Aspect Ratio parameter via the entry field in the Goals frame updates both the Aspect Ratio threshold in the metrics table inside the Display frame and the value used for the Convex and Concave Stretching filters on the Boundaries tab.
The Boundary Growth Rate parameter is used to limit the maximum rate of change in the distance between consecutive grid points (i.e. edge length) along the connectors and compute the decay for unstructured domains created by the Automatic Surface Mesh functionality. Additionally, this parameter is also used to define the growth rate used by the Sync Spacings and 2D T-Rex algorithms, which are used internally by the Automatic Surface Mesh functionality. For more information on how these algorithms use the growth rate parameter, please review the linked sections.
The last element in this frame is a pull-down list with options to select the desired Algorithm for populating the isotropic and anisotropic (i.e. T-Rex) portions of the unstructured domains being created. The available options in this pull-down list are:
- Advancing Front: If this option is selected, the Advancing Front algorithm is used to populate the isotropic portion of the unstructured domains. Additionally, this option sets the surface cell type for both the isotropic and anisotropic portions of the new unstructured domains to triangles only.
- Quad Dominant: If this option is selected, the Advancing Front Ortho algorithm is used to populate the isotropic portion of the unstructured domains. Additionally, this option sets the surface cell type for both the isotropic and anisotropic portions of the new unstructured domains to quad-dominant (i.e. a combination of triangular and quadrilateral surface cells).
- Hybrid: If this option is selected, the Advancing Front algorithm is used to populate the isotropic portion of the unstructured domains. Additionally, this option sets the surface cell type for the anisotropic portion to quad-dominant (i.e. a combination of triangular and quadrilateral surface cells) and for the isotropic portion to triangles only.