[Gmsh] Create a Boundary Layer around a blade

[Christophe Geuzaine]

On 07 Feb 2014, at 19:10, Christophe Geuzaine <cgeuzaine at ulg.ac.be> wrote:

> 
> On 06 Feb 2014, at 10:05, Alexander Tismer <alexander.tismer at ihs.uni-stuttgart.de> wrote:
> 
>> Hello,
>> 
>> I try to create a boundary layer around a blade of a hydraulic turbine with gmsh.
>> 
>> According to the paper “Gmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities” (page 18-19) gmsh is able to create such a layer from a set of source surfaces. For me it is not really clear how to do it.
>> Has anybody an example geo file?
>> Furthermore I want to do that with my own written subclasses of GEdge, GFace and GVertex using gmsh as a library. Is this also possible? Currently I created a 3-d mesh of my channel using my own written classes successfully. However I’m in trouble with the boundary layer creation around the blade, hub and shroud.
>> 
> 
> Dear Alexander,
> 
> The feature mentioned in the paper can be accessed by simply using the "Extrude" command (see the attached example).

With the attachment:

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> This creates actual geometrical entities for the layer. A more "classical" boundary layer mesh generator (which does not create new entities, but simply extrudes a layer inside the volume) is also under development, but it's not documented yet.
> 
> Christophe
> 
>> Any help is really appreciated.
>> 
>> Many Thanks
>> Alex
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> 
> -- 
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science 
> http://www.montefiore.ulg.ac.be/~geuzaine
> 
> 
> 

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