Ignore Edges
To remove isolated edges or edges adjacent to precisely two domains or two faces from the geometry, on the Geometry toolbar, from the Virtual Operations menu (), select Ignore Edges (). Then enter the properties of the operation using the following sections:
Input
Select the edges that you want to ignore in the Graphics window. These then appear in the Edges to ignore list. If the geometry sequence includes user-defined selections above the Ignore Edges node, choose Manual to select edges, or choose one of the selection nodes from the list next to Edges to ignore.
Click the Active button to toggle between turning ON and OFF the Edges to ignore selections.
Use the Ignore adjacent vertices check box to specify if the operation also removes the ignorable start and end vertices of the edges.
The operation removes the selected edges that are isolated or that are adjacent to precisely two faces or are between two domains.
Mesh Control
Use the Keep input for mesh control check box to specify that the selected edges disappear from the geometry but become available when you build the mesh. You can, for example, use mesh control edges to control the element size inside a domain or to partition the geometry to use a mapped mesh. See also Mesh Control Edges.