Use Delete Entities () to delete geometric entities from a mesh, as seen in Figure 8-51.

To add a Delete Entities node, select the entities to delete in the Graphics window, then choose one of the following:

Enter the properties for Delete Entities using the following sections:

Define the geometric entities that you want to delete. You choose the geometric entity level from the Geometric entity level list: Choose Domain, Boundary, Edge, or Point to specify the domains, boundaries, edges, or vertices, respectively, that you want to delete or choose a named selection to refer to a previously defined selection. Use All domains, All boundaries, All edges, or All points to select all entities of the specified dimension.

In 3D, when Geometric entity level is set to Domain, select Keep as unmeshed domains (cleared by default) to only delete the domain elements while keeping the domains as unmeshed as well as keeping the adjacent meshed boundaries. Use the Free Tetrahedral operation to fill any unmeshed domain with tetrahedral elements.

Select the Delete adjacent lower-dimensional entities checkbox to also delete the adjacent entities of lower space dimensions.