[Gmsh] Mesh of a bottle

[Luca Verzeroli]

Thank you. During the waiting I manage to obtain something similar but
yours is helpfull too.
I've created the external surface by rotating a single line, Then I've
extruded the mesh by some layers. Finally, in order to refine, I had
applied some transfinite on the fillets.


--
Luca Verzeroli
R&D Process Engineer - Global Headquarters

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Serioplast Global Services Spa
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On Mon, 9 Jul 2018 at 21:17, Christophe Geuzaine <cgeuzaine at uliege.be>
wrote:

>
> Hi Luca,
>
> Do you want to generate a fully structured grid? Then the easiest is to
> directly extrude the mesh - see the attached file:
>
>
> Note that there is a small trick to get a fully extruded mesh in your
> case, as we can currently only extrude meshes on OpenCASCADE geometries by
> rotation angles (strictly) smaller than 2*pi. I thus had to rotate in 2
> steps. However this would lead to duplicate vertices on the seam - because
> if we apply "Coherence" (or "BooleanFragments") the geometrical entities
> will change... which will prevent the mesh extrusion to work. So the trick
> is:
>
> - extrude in 2 parts
> - mesh
> - remove the duplicate vertices "by hand" with the "Coherence Mesh"
> command.
>
> This is a bit ugly, but at least it works ;-)
>
> Christophe
>
>
> On 3 Jul 2018, at 09:20, Luca Verzeroli <luca.verzeroli at serioplast.com>
> wrote:
>
> Hi,
>
> I'm a researcher at the University of Bergamo (Italy). Me and my team are
> dealing with a FEM simulation involving bottles. We are trying to create a
> 3D mesh of a simple bottle obtained by rotating a section. I'm attaching
> the example and the geo file.
>
> The main difficulties we faced with is the insertion of almost two layers
> in the thickness. In the attachments we are trying to use two layers but we
> should add some more.
>
> Could someone give us some advice to realize a correct mesh?
>
> <Screenshot from 2018-07-03 09-04-31.png><Screenshot from 2018-07-03
> 09-05-14.png><Screenshot from 2018-07-03 09-06-17.png><bottle.geo>
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>
> —
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
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