I have a problem with the construction of a tubular geometry (diameter 102 mm, height 1000 mm) with an internal circular surface (diameter 102 mm) put at 100 mm from the botton of the tube. This internal surface has to be used in Fluent as injection surface for discrete phase but it has to be transparent for the fluid phase. I created the surface building a mid-surface and then traslating it at the desired location on Ansys SpaceClaim. The surface was regurarly trasmitted to Ansys Meshing while it was NOT TRASMITTED to Fluent.

What should I do to solve this problem?

Thank you