[Gmsh] .msh file problems

[David Colignon]

There was some errors in your .geo file and I attach here a new version.
You can control the refinement of the mesh by modifying the lc and lc2 characteristic length parameters at the beginning 
of the file.
But I also have some problems if I click on the "Refine" button (is it what you were also doing ?). "Refine" is just 
supposed to divide each triangle in 4 parts, it is not a smart mesh refinement tool, just a quick hack.

Dave


Javier Piñeiro wrote:
> Dear David
> 
> I attach you the .geo file and the .msh I created over it. If you try to 
> refine the msh, it will do it after giving a good list of errors. Over 
> the .geo file, meshing you will obtain the same mesh, and if you try to 
> refine it there, at least in my case, the program crashes.
> 
> Than you for your help
> 
> Javier
> 
> 
> 
> 2009/7/30 David Colignon <David.Colignon at ulg.ac.be 
> <mailto:David.Colignon at ulg.ac.be>>
> 
> 
>     Javier Piñeiro wrote:
> 
>         Dear All
> 
>         I am currently working on my MSc Thesis at Cranfield University
>         (UK) about Open Source and CFD, and Gmsh is one of the software
>         packages I am evaluating.
> 
>         My problem is that the startpoint for the comparartive is a mesh
>         developed in Gambit. It is a quite big file, with around 500000
>         cells and 34 Mb. The format file is .msh, but Gmsh is not able
>         to open it (even though it opens .msh).
> 
> 
> 
>     Hi Javier,
> 
>     I suppose Gambit and Gmsh use .msh as an extension for mesh file,
>     but it doesn't mean that the format of the files is the same (open
>     both with a text editor to see the differences). I am not aware that
>     Gmsh is able to open Gambit mesh files... Gmsh has its own format
>     for mesh files:
>     http://www.geuz.org/gmsh/doc/texinfo/gmsh-full.html#SEC56
> 
> 
> 
>         Does anyone know what the problem might be? Is there a way to
>         convert the file to something readible by Gmsh, if possible in
>         open source?
> 
> 
> 
>     Gmsh can also import and export meshes in  I-deas UNV, Nastran
>     BDF, STL, Medit MESH and VRML 1.0 files format
> 
> 
> 
>     Is
> 
>         the size of the file or the number of cells a limitation
> 
>         I also tried to do the mesh from scratch on Gmsh, including the
>         geometry. I got a mesh but if I try to refine it the program
>         crashes.
> 
> 
> 
>     Can you send us your .geo file ?
> 
> 
>     Cheers,
> 
>     Dave
> 
>     -- 
>     David Colignon, Ph.D.
>     Collaborateur Logistique du F.R.S.-FNRS
>     CÉCI - Consortium des Équipements de Calcul Intensif
>     ACE - Applied & Computational Electromagnetics
>     Sart-Tilman B28
>     Université de Liège
>     4000 Liège - BELGIQUE
>     Tél: +32 (0)4 366 37 32
>     Fax: +32 (0)4 366 29 10
>     WWW:    http://hpc.montefiore.ulg.ac.be/
>     Agenda:
>     http://www.google.com/calendar/embed?src=david.colignon%40gmail.com
> 
> 
>         Changing the options in the characteristic length does not have
>         any effect, it generates exactly the same mesh. Does anyone know
>         something about this?
> 
> 
>         Thank you in advanced for your help
> 
>          
>         Kind regards
> 
>          
>         Javier Pineiro
> 
> 
>         -- 
>         Javier Piñeiro Pérez
> 
> 
>         ------------------------------------------------------------------------
> 
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>         gmsh at geuz.org <mailto:gmsh at geuz.org>
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> 
> 
> 
> 
> 
> -- 
> Javier Piñeiro Pérez
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