[Gmsh] Trouble meshing 3d shape in "wind tunnel"

[Bob Basham]

Hi All,

     I am pretty new to CFD in general.  Just starting to figure out 
gmsh in order to run some simulations using ELMER.  I need to put a 3d 
shape inside of  a wind tunnel.  I have created the shape in Rhino 3d 
and finally have success with importing to gmsh as a STEP file (IGES 
gave all sorts of little holes in surface).  I have tried and tried to 
get a 3d mesh of the volume inside the "tunnel" and outside the shape, 
no luck.  I am sure that I am missing something basic.  Can someone 
point me in the right direction.  I have lastly tried merging a STP of 
the "tunnel" with a STP of the surface, but can't get a 3d mesh of the 
inside.  I get a self intersecting error.  I have successfully used a 
half model (like symmetry), the surface and tunnel are joined at the 
middle.  I would like to have my surface suspended in the tunnel 
though.  Thank you very much!

-- 
Bob Basham