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[Mikael Mortensen <question156790@xxxxxxxxxxxxxxxxxxxxx>]

Question #156790 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/156790

    Status: Open => Answered

Mikael Mortensen proposed the following answer:
Do you have Neuman on Eikonal's equation? Is that even possible?  Anyway,
I'm not sure how to do that since there are no ds terms naturally occuring
in this equation (except the stabilization). Perhaps if you rewrite using
the chain rule? Sorry I can't be of more assistanse.

Best regards

Mikael

On 10 May 2011 14:41, Chaffra <question156790@xxxxxxxxxxxxxxxxxxxxx>
wrote:

> Question #156790 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/156790
>
>     Status: Solved => Open
>
> Chaffra is still having a problem:
> I do have a related question:
>
> How do I specify the following boudary condition for my problem. I have
> a initial propagation vector let's say ko = [1,0,0] at x[0] ==0 and k =
> (1/n)*grad(y). Do I write something like:
>
> F = inner(grad(y), grad(y))*v*dx - n**2*v*dx + eps*inner(grad(u) +
> inner(ko,grad(y))*ds ?
>
> I am not sure how to write this kind of boundaries...
>
> Thanks,
> Chaffra
>
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