The use of Virtual Topology within the Meshing Application can invalidate Named Selection definitions. Consider the case where a Named Selection ‘Region1’ is defined in terms of 4 CAD faces (1,2,3 and 4). If this geometry is then loaded into the Meshing Application and Virtual Topology is used to merge 2 of these faces (3 and 4), the original Named Selection can no longer be resolved. On importing the corresponding cmdb file into CFX-Pre, the Named Selection will be modified so that it only refers to the ‘resolvable’ faces. Hence, in CFX-Pre, the Named Selection ‘Region1’ would be defined in terms of faces 1 & 2 only.

Note, when using Virtual Topology within CFX-Mesh, the region definitions will be updated immediately to resolve the Virtual Topology changes.