The Adjacent () selection outputs selections adjacent to specified geometric entities or selections. For example, select all domains adjacent to some boundaries or all boundaries adjacent to some domains.

The adjacent geometric entities can be of any type (domains, boundaries, edges, or points) regardless of the geometric entity level for the input selections. To add this node, right-click the Definitions node and choose Selections>Adjacent.

Based on space dimension, select a Geometric entity level — Domain, Boundary, Edge (3D only), or Point for the selections to add or remove from the Input selections list and to create a selection of adjacent geometric entities. Click the Add button () to open an Add dialog box that contains selections of the chosen geometric entity level that appear earlier in the geometry sequence. Use the Move Up (), Move Down (), and Delete () buttons to organize the list.

In the Geometry entity level list, choose the type of output entities: Adjacent domains, Adjacent boundaries, Adjacent edges (3D only), or Adjacent points. If the output entities have a lower dimension that the input entities, there are also two check boxes that you can use to select exterior and interior entities of the union of the input selections.

By default, only exterior entities are selected. For example, if the input selections are domains selections, and the output is adjacent boundaries, the Exterior boundaries (selected by default) and Interior boundaries check boxes display.