[Gmsh] Meshing STL geometry

[Christophe Geuzaine]

Alexandre Fallet wrote:
> Hi !
>  
> First of all I'd like to thank you for this powerfull and usefull 
> software. I'm a newbie and I'm currently still learning to work with 
> GMSH. I'm dealing with 3D surfaces in STL format that I would use to 
> generate volumetric mesh. I had a look on the wiki and tutorials but i 
> didn't find any example of such a case.
>  
> Actually I succeed in meshing the volume from the STL surface mesh and 
> now I'd like to control the size of the mesh. I guess that  version 1.64 
> has the ability to remesh STL surfaces, using mesh options to refine or 
> to coarse the "initial" mesh. I found in the reference manual the 
> signification of the parameters but some are not totally clear for me. 
> So, my question is:
>  
> What means:
> 1. Edge prolongation threshold (Mesh.EdgeProlongationThreshold)
> 2. LC/Minimum element size (Mesh.MinimumElementSizeFact)
> 3. LC/Target element size (Mesh.TargetElementSizeFact)
>  
> I thank you in advance for your help !!!
>  

"Edge prolongation" is currently not used.

"LC/Target" prescribes the target element size ("20" means "20 elements
per characteristic length"). This target is then constrained by
"LC/Minimum" and the number of elements per radius of curvature.

(Note that this is all very experimental and unstable, and that the 
options will most likely change in future versions.)



> Alexandre
>  
> ----------------------------------------------------------
> Alexandre FALLET
> Doctorant - Laboratoire GPM2
> BP46
> 101 rue de la physique
> 38402 Saint Martin d'Heres
> Tel.: 04 76 82 64 65
> Fax.: 04 76 82 63 82
> Email: alexandre.fallet at gpm2.inpg.fr <mailto:alexandre.fallet at gpm2.inpg.fr>
> -----------------------------------------------------------
> 
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-- 
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine