Named Selections objects provide the property Protected. Setting this property instructs the mesher to respect the geometry features (bodies, faces, edges, or vertices) that the Named Selection object is scoped to.

You can choose Program Controlled (default), Yes, or No to determine whether a Named Selection is to be protected. When Program Controlled is selected, the scoped object(s) will be protected if the Named Selection is used for boundary conditions, symmetry, other types of loads for the solver, as well as match controls and hard sizing controls for meshing. The scoped objects will not receive additional protection by the mesher if the Named Selection is not used for one of these controls.