Re: [Getfem-users] assembling equations containing curls

[Alex Magnes]

hi everybody!

thanks for the answer, but sorry for my bad questioning. i think the 
vector identity mentioned will work.
unfortunatly i forgot to say that i also have terms like integral 
curl(A) to deal with. So my main question is, if there exists a function 
like vRot(#i), like the other comp commands,  or way to deal directly 
with curls.

regards and thanks in advance, alex


Richard George wrote:
> I guess you get an authorative answer from someone like Yves Reynard
> who wrote getfem, but
>
> could you express curl(curl(A)) in terms of available functions using 
> an identity such as
>
> curl(curl(A)) = grad(div(A)) - vector_laplacian(A)
>
> would that make sense / allow enough numerical accuracy?
>
>    Richard George
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>
>
> On Sun, 9 Sep 2007, Alex Magnes wrote:
>
> > Hi everybody!
> >
> >
> > Is there any possibility to assemble a term like integral curl(curl A)
> > where A is a vector field? I just found examples dealing with gradients
> > and divergences.
> >
> > regards and thanks in advance, alex
> >
> >
> >
> >
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