[Getdp] example of fixed point iteration in GetDP

Christophe Geuzaine cgeuzaine at ulg.ac.be
Tue Jul 15 11:08:56 CEST 2014


On 15 Jul 2014, at 11:04, Ruth Vazquez Sabariego <Ruth.Sabariego at esat.kuleuven.be> wrote:

> I see. The demo I am talking about is indeed in the GetDP part: http://www.geuz.org/getdp/
> 
> I have a svn release and compile myself on a Mac. 
> Just checked the precompiled version and it is there. 
> In the Mac version, it is in the directory 
> share/doc/getdp/demos
> 

Or cf. http://onelab.info/wiki/Inductor : if you set Flag_NL_Newton_Raphson to 0 you will get a fixed point iteration.


> Ruth
> 
> 
> 
> On 15 Jul 2014, at 10:54, Frederic Trillaud <ftrillaudp at gmail.com> wrote:
> 
>> Dear Ruth,
>> 
>> Thank you for your quick reply. I have the oneLab bundle Gmsh-Getdp
>> installed on my linux box. However, it does not come with examples. Is
>> the one mentioned can be found on the Getdp website or I should install
>> Getdp to access it?
>> 
>> 
>> Best,
>> 
>> 
>> Frederic
>> 
>> 
>> On mar, 2014-07-15 at 07:23 +0000, Ruth Vazquez Sabariego wrote:
>>> Hi Frederic,
>>> 
>>> 
>>> You can inspire yourself from the magnetostatic demo you get when
>>> downloading GetDP.
>>> 
>>> 
>>> There is a complete Newton-Raphson example, i.e. a term for completing
>>> the Jacobian matrix is included (JacNL).
>>> You can just remove or comment it for getting a fixed point iteration.
>>> The resolution does not change.
>>> 
>>> 
>>> HTH,
>>> Ruth
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On 14 Jul 2014, at 18:29, Frederic Trillaud Pighi
>>> <ftrillaudp at pumas.iingen.unam.mx> wrote:
>>> 
>>>> Dear all,
>>>> 
>>>> 
>>>> 
>>>> I have a non-linear magnetodynamics problem that involves a fixed
>>>> point iteration. Would someone have an example to share or some
>>>> recommendation how to implement the algorithm?
>>>> 
>>>> 
>>>> 
>>>> The problem is the following (A formulation, sig: electrical
>>>> conductivity, Je: applied current):
>>>> 
>>>> 
>>>> 
>>>> Curl[nu*Curl(A)]+sig*dA/dt = Je
>>>> 
>>>> 
>>>> 
>>>> with,
>>>> 
>>>> 
>>>> 
>>>> sig = f(-dA/dt+Je/sig])
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Best,
>>>> 
>>>> 
>>>> 
>>>> 
>>>> Frederic
>>>> 
>>>> _______________________________________________
>>>> getdp mailing list
>>>> getdp at geuz.org
>>>> http://www.geuz.org/mailman/listinfo/getdp
>>> 
>>>>>> Prof. Ruth V. Sabariego
>>> KU Leuven  
>>> Dept. Electrical Engineering ESAT/Electa
>>> http://www.esat.kuleuven.be/electa
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> getdp mailing list
>>> getdp at geuz.org
>>> http://www.geuz.org/mailman/listinfo/getdp
>> 
> 
>> Prof. Ruth V. Sabariego
> KU Leuven  
> Dept. Electrical Engineering ESAT/Electa
> http://www.esat.kuleuven.be/electa
> 
> 
> 
> 
> 
> 
> 
> 
> _______________________________________________
> getdp mailing list
> getdp at geuz.org
> http://www.geuz.org/mailman/listinfo/getdp

-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine







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