[Gmsh] .msh file problems
David Colignon
David.Colignon at ulg.ac.be
Thu Jul 30 21:12:14 CEST 2009
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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>
>
>
>
> --
> Javier Piñeiro Pérez
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