When you create a boundary condition in CFX-Pre, several things happen in the Viewer:
Symbols for the boundary conditions are displayed in the viewer, based on type. The visibility of these symbols is determined by the Label and Marker control form. For details, see Labels and Markers.
Boundary condition symbols are shown at surface display line intersections.
Regions contained in the boundary condition are highlighted according to settings specified under Edit > Options. For details, see 3D Viewer Toolbar.
If multiple boundary conditions are defined on a region of mesh, an error appears in the physics validation window below the viewer.
Note: Inlets, outlets, and openings use arrow symbols that are locally normal to the boundary surface, irrespective of the actual direction specified for the boundary condition. It is possible to show arrows pointing in the specified direction by creating a Boundary Vector object. You can optionally turn off the default arrow symbols by clearing the check boxes on Label and Marker control form (see above). Also see Boundary Vector and Boundary Markers for more details.
When using CFX-Pre within Ansys Workbench or with a pale viewer background color, the colors of these symbols are black in order to make them more visible.