[Gmsh] help: iron sheet with hole.

[Ruth V. Sabariego]

Hi Javier,

I've modified your geometry so that you see how to include the holes, whether you consider  a volume sheet or a surface. 
The idea is that all the basic geometrical entities are embedded in the rest.
You can use extrusion, as you did, but carefully: you should avoid defining lines/surfaces that will re-appear when extruding. That's asking for troubles when meshing.

The attached file contains only the volume iron sheet with holes, the rest is yet to be connected.

HTH,
Ruth





On 11 Feb 2013, at 14:25, Javier Lopez <lopez.zozaya at gmail.com> wrote:

> Hi Roman,
> The iron Sheet volume is not that important, but I tried to mesh without that thickness and I have the same problem. 
> I will prefer to simulate the system as simple as posible.
> 
> Regards,
> Javier
> 
> 2013/2/11 Roman Putanowicz <putanowr at l5.pk.edu.pl>
> > Hi,
> > I'm trying to mesh an iron sheet with several holes on it to see how an air
> > flow pass through it.
> > When I manage to mesh both volumes, I  tried simulate the system but the
> > air flow it dosen't pass through the holes. another times it only mesh the
> > bottom volume.
> >
> > Thanks in advance for your help
> 
> Hi Javier,
> 
> Looking at you model my first question is how important is to
> model the iron sheet as volume? The ratio sheet thickness to the hole
> radius looks small thus the question is if we can neglect the sheet
> thickness. I know it can change the flow pattern but on the other
> hand it can make the mesh generation easier (for the simulation
> the drawback is the presence of internal boundaries).
> 
> Regards
> 
> Roman
> 
> --
> Roman Putanowicz, PhD  < putanowr at l5.pk.edu.pl  >
> Institute for Computational Civil Engng (L-5)
> Dept. of Civil Engng, Cracow Univ. of Technology
> www.l5.pk.edu.pl, tel. +48 12 628 2569, fax 2034
> 
> _______________________________________________
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> gmsh at geuz.org
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—
Dr. Ir. Ruth V. Sabariego
University of Liege, Electrical Engineering and Computer Science
http://ace.montefiore.ulg.ac.be/







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