[Gmsh] Characteristic Length

[Jehanzeb Hameed]

>With a char length of 0.5, you should get (about) 4 division per side of
your square (4*0.5=2, which is the length of one side of the square).

Actually, I get 3 divisions per side (with length of each side being .666).
This is whats confusing me about characteristic length. How is the "about"
factor decided? And how will the radius of the circumscribed circles be
determined ?

Thanks,
-Jehanzeb


On Fri, Mar 21, 2008 at 12:18 PM, Christophe Geuzaine <cgeuzaine at ulg.ac.be>
wrote:

> Jehanzeb Hameed wrote:
> > Hi,
> >
> > I cant understand how "Characteristic Length" works in gmsh. I specify 4
> > points (which are corner of a square, bottom left = (-1,-1) , top right
> > = (1,1)  ). The points have characteristic length 0.5  . I mesh this
> > domain. I cant figure out what the relationship between radius of the
> > circumscribed circle and characteristic length is. The documentation
> > says this:
> >
> > "The size of the mesh elements will then be computed by linearly
> > interpolating these characteristic lengths on the initial mesh".
> >
> > I cant understand between what values is the size of the mesh elements
> > being interpolated. How can I find this out?
>
>
> With a char length of 0.5, you should get (about) 4 division per side of
> your square (4*0.5=2, which is the length of one side of the square).
>
>
>
>
> >
> > Thanks,
> > -Jehanzeb
> >
> >
> >
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> >
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>
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine<http://www.montefiore.ulg.ac.be/%7Egeuzaine>
>
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