BC_Type = InteriorSurf: This is not a boundary condition in the traditional sense and hence does not influence the solution process. The main purpose of this entity is to enable you to define surfaces (made out of element faces) inside the flow domain for visualization and/or refinement purposes (such as normal to the boundary).

The syntax for the InteriorSurf boundary is:

InteriorSurf Boundary_Name { }

 

 

See Also:

Assign Boundary Conditions

Boundary Conditions