[Gmsh] Embed points (Re: Question about Gmsh)

[Zenker, Dr. Matthias]

Hi,

I have just discovered that this is also a way to refine a surface mesh locally: just embed a point with a different coherence length. Very practical!
I didn't find a corresponding command for volumes. Is there such a thing as

Point | Line | Surface {expression-list} In Volume {expression};

If not, consider this as a feature request...

Regards,

Matthias

> -----Ursprüngliche Nachricht-----
> Von: David Colignon [mailto:David.Colignon at ulg.ac.be]
> Gesendet: Donnerstag, 8. November 2012 10:40
> An: youngjun at mail.ustc.edu.cn
> Cc: gmsh at geuz.org
> Betreff: Re: [Gmsh] Question about Gmsh
>
> Hi,
>
> did you see or try this:
>
> https://geuz.org/gmsh/doc/texinfo/gmsh.html#Miscellaneous-mesh-
> commands
>
> Point | Line { expression-list } In Surface { expression };
>
>      Embed the point(s) or line(s) in the given surface. The surface mesh will
> conform to the mesh of the point(s) or lines(s). Note that embedded lines
> only work with the MeshAdapt 2-D algorithm.
>
>
> Regards,
>
> Dave
>
> --
> David Colignon, Ph.D.
> Collaborateur Logistique du F.R.S.-FNRS
> CÉCI - Consortium des Équipements de Calcul Intensif
> ACE - Applied & Computational Electromagnetics
> Université de Liège
> Sart-Tilman B28
> 10, Grande Traverse
> 4000 Liège - BELGIQUE
> Tél: +32 (0)4 366 37 32
> WWW:    http://www.ceci-hpc.be/
> Agenda:
> http://www.google.com/calendar/embed?src=david.colignon%40gmail.com
>
> On 08/11/12 05:56, youngjun at mail.ustc.edu.cn wrote:
> > Dear Professor Christophe Geuzaine and Professor Jean-François Remacle,
> >
> > I'm a graduate student from University of Science and Technology of China.
> My major is geophysics and I am now using Gmsh to build models for
> modeling geoeletric field.
> >
> > These models are quite simple. The structure of the model is a cuboid
> space with some simple bodies whose properties differ from the cuboid
> space(We call them anomalies) inside it. Then when I try to specify large
> amount of points that regularly spread on the surface of the model for
> measuring the eletric potential, it seems that it's not going to be an easy task.
> I have to define all these points, then create line segments between every
> two adjacent points, followed by forming line loops to define plane surfaces,
> and finally put them into a part of the volume in order to execute the 3D
> mesh. If I don't do it in this way, the produced grid will have nothing to do
> with these deteting points. However, I need to make sure that these points
> on the surface are nodes of the elements.
> >
> > So is there an easy technique to accomplish this operation? More generally,
> is there an elementary classification for stand-alone control points which is
> going to be the nodes of the elements when execute the mesh operation,
> like the ones I described above? I'm not sure if I miss some important
> information in the Gmsh Reference Manual, but till now I can't find a simple
> way.
> >
> > The attachment is the .geo file that describes the model I want to build.
> Only the points, and lines are defined in the file. If these elementaries have
> to be defined manually, thousands of operations are needed.
> >
> > The Gmsh with GUI is quite easy to operate. Thanks for offering us this
> excellent software!
> >
> > Best Regards,
> > Jun Yang
> > University of Scinece and Technology of China
> > Heifei,China
> > Email: youngjun at mail.ustc.edu.cn
> >
> >
> >
> > _______________________________________________
> > gmsh mailing list
> > gmsh at geuz.org
> > http://www.geuz.org/mailman/listinfo/gmsh
> >
>
>



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