> On 29 Jul 2017, at 22:22, David Colignon <[email protected]> wrote:
>
>
> On 29/07/17 13:28, [email protected] wrote:
>
>> Dear Professor Geuzaine,
>> I want to show my group at my working place, that the combination of gmsh
>> and getdp is at least as powerful as an commercial FEA Software or even more
>> powerful. For that purpose I have imported a model of an Claw Pole
>> Alternator as a step file into gmsh. That worked very well and it is no
>> problem to pick the faces and volumes with the gui. But because of the fact
>> that I have imported the geometry I have no information about the elementary
>> entities in the geo file. So I can't change the characteristic lengths
>> individually for the interesting lines/points.
>> Is it possible to get for example the volume or a surface with a command
>> like 'get volume at point (x,y,z)' ? That would be awesome to automate the
>> picking of the areas and volumes for defining the physical entities.
You can use the BoundingBox commands for this. For example:
s() = Volume In BoundingBox {xmin, ymin, zmin, xmax, ymax, zmax};
will get you all the volumes in the provided bounding box. The same can be used
for surfaces, curves or vertices.
>> Is there a function / command to get the surfaces that define a volume or
>> the lines that define an area? The problem is that the geometry is very
>> complicated and I need to define the elements for every volume or area
>> seperately to get a fine mesh in the airgap and a coarse mesh in the outer
>> air and so on.
>
> Hi,
>
> Here it is:
>
> http://gmsh.info/doc/texinfo/gmsh.html#Transformations
>
> Boundary { transform-list }
>
+1
Note that to associate mesh sizes with geometry vertices a useful command is
also PointsOf. For example,
p() = PointsOf{ Volume{1}; };
will get you all the points from volume 1, so that you could do
Characteristic Length { PointsOf{ Volume{1}; } } = mylc;
Christophe
> (Not a transformation per-se.) Returns the entities on the boundary of the
> elementary entities in transform-list, with signs indicating their
> orientation in the boundary. To get unsigned tags (e.g. to reuse the output
> in other commands), apply the Abs function on the returned list.
>
> Regards,
>
> Dave
>
> --
> David Colignon, Ph.D.
> 1er Logisticien de Recherche
> Université de Liège
> ACE - Applied & Computational Electromagnetics
> Quartier POLYTECH 1 - Montefiore B28
> Allée de la découverte 10
> 4000 Liège - BELGIQUE
> Tél: +32 (0)4 366 37 32
> http://www.ulg.ac.be/nic4
>
>> Is there a way to combine several fields for every volume to one field and
>> set it as the background field?
>> Sorry for so many questions and thanks for your time reading this.
>> Best regards
>> Fabian Müller
>>
>> _______________________________________________
>> gmsh mailing list
>> [email protected]
>> http://onelab.info/mailman/listinfo/gmsh
>
> _______________________________________________
> gmsh mailing list
> [email protected]
> http://onelab.info/mailman/listinfo/gmsh
--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
Free software: http://gmsh.info | http://getdp.info | http://onelab.info
_______________________________________________
gmsh mailing list
[email protected]
http://onelab.info/mailman/listinfo/gmsh
