[Getdp] problem solution permanent magnets-getdp

Frederic Trillaud ftrillaudp at pumas.ii.unam.mx
Mon Feb 25 17:30:00 CET 2013


Hi,

I did a couple of tests with different ways to create the same geometry
for a permanent magnet problem. It appears that you have to create the
geometry in the following manner to get a proper result:

1- Create all the points of the geometry only once, do not duplicate
points for geometries sharing same boundaries
2- use previously created lines and arcs for geometries sharing the same
lines and arcs (same idea as for the points)

Duplicating points and lines/arcs etc..., even though using "Coherence"
function triggers some undesirable effects on the solutions (see
attached files).

Best,

Frederic

On Sun, 2013-02-24 at 19:08 +0100, Jasper wrote:
> Hi Frederic,
> 
> The issue is with your geometry definition. Shared edges of surfaces
> use multiple lines and circles. As such you have to issue a
> "Coherence" command before defining your physical groups.
> A beter way forward would be to make sure lines and circles are
> uniquely defined (i.e. only once).
> 
> Best regards,
> 
> Jasper
> 
> On Sat, Feb 23, 2013 at 9:52 PM, Frederic Trillaud
> <ftrillaudp at pumas.ii.unam.mx> wrote:
> > Hi,
> >
> > I have been doing some tests on permanent magnets. I am having some
> > issues with the magnetic solution of a problem involving 2 permanent
> > magnets. The solution of the magnetic field looks awkward.
> >
> > Here are the files and a pic of the geometry showing the magnets. If
> > someone has an opinion on what may be the reason of the obtained flux
> > lines.
> >
> > To run the example, I have created the script main.sh which generates
> > the mesh, solve and generate the pos files.
> >
> > Best,
> >
> > Frederic
> >
> > _______________________________________________
> > getdp mailing list
> > getdp at geuz.org
> > http://www.geuz.org/mailman/listinfo/getdp
> >
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