Rob
Ansys Employee

 

Add a label to the faces in the geometry tool (interior-measure-fred for example). What you want is for the surface to have a name that is visible, identifable and understood by Fluent Meshing to not be removed. Interior is the definition of surfaces that are present in the mesh but don’t do anything to the flow. 

To add - those faces are part of the geometry, ie they're meshed with the volumes. An alternative for Fluent is the Imprint option, I don't think that'll transfer to CFD Post. 

I recommend updating to 2023R1 as the Report file/generation features you’re (probably) using in CFD Post are now also in Fluent.