[Getdp] Info test-nl.pro
Christophe Geuzaine
cag32 at case.edu
Sun Mar 5 01:46:43 CET 2006
elettro-g- at tiscali.it wrote:
> Hi,
> I am an italian Phd student and i want use GetDP for investigate the
> induction motors. I find very interesting the simple you develop
> about
> the steel non linearity. Looking the code, i have some difficulty to
> understan the formulation involved.
> In particular i do'nt understand the "Magsta_a_nl"...i comprise good
> the a formulation in the linear case, but in the non linear case i
> don't understand, in particular, the following espression:
>
> Galerkin { JacNL[ - dbdh[ {d phi} ] * Dof{d phi} , {d phi} ] ;
> In Steel ; Jacobian MyJac ; Integration MyInt ; }
>
> Galerkin { [ b[ - {d phi} ] , {d phi} ] ;
> In Steel ; Jacobian MyJac ; Integration MyInt ; }
>
> What's the meanig of JacNL? What it's role?
It represents the Jacobian used in the Newton-Raphson iterations.
> Why, in the non linar case, is necessary to add the secon expression?
> Mybe I don't Know the right formulation..
>
> Thenks a lot for your time and your work!!
> I hope you can help me!
> Best
> Ing. Luigi Alberti
>
>
>
>
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> Tiscali ADSL 4 Mega Flat
> Naviga senza limiti con l'unica Adsl a 4 Mega di velocità a soli 19,95 € al mese!
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--
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine