[TTM]

Dear cfd-online community

I am currently trying to create a mesh for a centrifugal pump impeller using TurboGrid:

sketch
http://www7.pic-upload.de/25.01.12/tfn9jdb4cgib.jpg

My problem is that the trailing edges of the impeller end on the same radial coordinates as the hub an shroud curves (please see sketch).
Furthermore I need an outlet domain where I can define interfaces to the volute and the side wall gaps (like on the sketch).
TurboGrid creates a valid geometry (including the outlet domain) with the curves I provide but when it comes to meshing TurboGrid meshes the outlet domain as an extension of hub and shroud (so I have no domain in which I can set up the interfaces to the side wall domains).
If I move the outlet domain marker (the white diamonds) so that the outlet domain begins immediately after the trailing edges TurboGrid creates inverted elements on the surface between the trailing edges.

None of the tutorials or thesis I found in which TurboGrid was used included such an impeller geometry.
Is it even possible to create a mesh with TurboGrid where the hub/shroud end the way they do in my case? Is there any error source I am overlooking?

Thanks in advance