setting boundary conditions on internal edges

Renate Stump

Hi there,

Wondering if I could get some suggestions on my model. I have created a 2d face with three internal edges that extend vertically down from the outer edge of the face but do not reconnect with the lower edge of the face (ie there are gaps so that the flow can go through).

Whenever I try to set a boundary condition on these internal edges eg interior and then export the mesh (selecting the 2D option) I get the message WARN: Boundary entity X does not contain any valid entity and is not written.

Also, to see if the problem goes away I have graded and meshed the three internal edges. If I don't set any boundary conditions on these edges they don't appear to show up when I look at the grid in Fluent. Is there something else I should also be considering? Thanks for your help.

Cheers Renate