[Gmsh] Difficulties to obtain a coarse mesh with gmsh 2.0.
David Colignon
David.Colignon at ulg.ac.be
Thu Mar 29 17:54:20 CEST 2007
Hi Ronan,
can you try to mesh your square with the latest 2.0.5 version (if you are not already using it ...) or with the latest gmsh-nightly-source.tgz ?
You can have some explanations here:
http://www.geuz.org/pipermail/gmsh/2007/002468.html
and here:
http://www.geuz.org/pipermail/gmsh/2007/002475.html
...
> I am trying to create a tapered mesh from a fine to a coarse region. If
> I want one edge to have only one or two elements then the
> rectangle must have a length that is 10 times greater than the width. Is
> that correct?
Yes, but I suppose it is not a good solution for you
You can also ad an isolated point
Point(999) = { 10 , 10 , 10 , spacing } ;
to artificially increase the size of the bounding box and get rid of this limitation.
...
Cheers,
Dave
--
David Colignon, Ph.D.
ELAP - Service d'Electricité Appliquée
Institut Montefiore B28
Université de Liège
4000 Liège - BELGIQUE
Tél: +32 (0)4 366 37 32
Fax: +32 (0)4 366 29 10
http://elap.montefiore.ulg.ac.be
Ronan Perrussel wrote:
> Hello,
>
> I need a coarse mesh on the unit square.
> For this purpose, I use a characteristic length for the 4 vertices of
> the square of 0.5.
>
> If I use gmsh 1.65 for meshing, I obtain a mesh with 7 nodes and 10
> elements and this is nice :-).
> If I use gmsh 2.0 for meshing, I obtain a mesh with 67 nodes and 118
> elements and this is not so nice :-(.
>
> I do not manage to obtain less elements with gmsh 2.0 and I would like
> to understand why?
> (Is there a default option somewhere?)
>
> Thank you in advance,
> Best Regards,
>
> Ronan
>
> PS : in pratice, I am going to use the older version but I am definitely
> interested in your answer.
>
>
>
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