[Gmsh] Boundary Layer Surface Orientation

[Christophe Geuzaine]

Hackbarth, Axel wrote:
> I want to use the experimental boundary layer command (as described 
> here: http://www.geuz.org/pipermail/gmsh/2007/002599.html)
> I try meshing a 3D-wing which has been extruded from one surface. This 
> original surface has always the opposite orientation as all other 
> surfaces, at least if I look at the boundary layer (the top BL of the 
> picture attached).
> How can I change surface orientation? The negative of the surface ID (as 
> it is done for surface loops) could not be identified by the BL command.

Hi Axel - Good catch. This should be fixed in tomorrow's nightly build.
You should now be able to do e.g.

Extrude { Surface{6, -8}; Layers{5, 0.01}; }

to invert the extrusion direction for surface 8. Could you give it a try
and let me know if it works in your case?

Thanks,
Ch.



>  
> Cheers,
> Axel
> 
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine