[Getdp] axial symmetric magnetic problem

[Christophe Geuzaine]

m.fenner at gmx.net wrote:

> Dear Christophe,
> 
> I still don't get it. I am working on a coupled problem with thermal
> and electromagnetic features. Guided by the mailing list archive
> (many thanks to all contributors) I was able to solve a few textbook
> problems to reproduce analytical results, mainly heat conduction
> problems. (Though there are some open questions as well.)
> 
> Now I switched to the magnetic stuff. I wanted to see the magnetic
> field of a ring current. So I took the demo example included in the
> getDP distribution, modified the .geo and .pro files
> (appropriately?). The results show the magnetic fields on the y-axis
> ___in radial direction___ , i.e. in + and - x direction in
> postprocessing mode. This seems rather unphysical to me. I guess the
> problem definition is somehow wrong but I don't see where. I attached
> the .geo and .pro files just in case anybody finds the time to have a
> look at these.
> 
> Many thanks in advance. Best regards
> 

Dear Matthias - You only missed the boundary condition on the symmetry
axis (you need to enforce that no flux can cross it). Here are the
modified files.

Best,

Christophe

-- 
Christophe Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: coil-01.geo
URL: <http://www.geuz.org/pipermail/getdp/attachments/20040726/05fa31e0/attachment.geo>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: Magnetostatics.pro
URL: <http://www.geuz.org/pipermail/getdp/attachments/20040726/05fa31e0/attachment.pro>
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: coil-01.pro
URL: <http://www.geuz.org/pipermail/getdp/attachments/20040726/05fa31e0/attachment-0001.pro>