Named Selections objects provide the property Send to Solver. This property enables you to choose ( by default or ) whether a Named Selection is sent to the solver. Named Selections scoped to edges/vertices/faces are sent to the solver as nodes and Named Selections scoped to bodies are sent to the solver as elements. If your Named Selection is scoped to an element face, an additional property becomes available: the Send As property. Using this property, you can send the element face-based Named Selection to the solver as nodes (default) or you can specify that it is sent as Mesh200 elements that converts the scoped element faces to Mesh200 elements and sends those elements as a component to the solver.
Recommendation: When the application sends a named selection scoped to bodies to the Mechanical APDL solver, elements with the element types equal to those associated with the scoped bodies are selected using the ESEL command. If element types are modified for these elements using a command snippet, the named selection scoped to these bodies may not select the correct set of elements. In this case, Ansys recommends that you convert the bodies into elements in Mechanical and scope the named selections directly to the elements.