Thats great! I'm glad that you've managed to work it out :-)
Best,
Jean-Paul
On Wednesday, May 17, 2017 at 10:06:18 AM UTC+2, hanks0...@gmail.com wrote:
>
> Thank you very much!!
>
> It seems that I can solve my problem.
>
> Thank you!
>
> Kyusik.
>
--
The deal.II project is located at
Thank you very much!!
It seems that I can solve my problem.
Thank you!
Kyusik.
--
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see
https://groups.google.com/d/forum/dealii?hl=en
---
You received this message because you are subscribed to the
Hi Kyusik,
What makes me confused here is that, according to your explanation, two
> different DoFHandler could be used simultaneously.
>
Yes, that it correct. You can convert between cell iterators. So I do the
following:
typename Triangulation::active_cell_iterator
cell
Dear Jean-Paul,
Thank you again for a detailed explanation.
However, please excuse my ignorance...
>
> 1. Create a vector-valued finite element system (maybe an
> FESystem(FE_Q(1),dim) ) and use it to distribute DoFs onto a new
> DoFHandler.
> 2. Create a mass matrix "M" with the new
Dear Kyusik,
> I'm sorry to tell you that actually I don't know how to project
> grad_solution into the vector-valued FE space
>
> Do you happen to know some example tutorial code that includes it?
>
Off the top of my head, no I don't know of an example tutorial that
demonstrates it.
Dear Jean-Paul Pelteret,
Thank you very much for your help. It is very helpful.
> However, you'll note that this function only makes sense (and its
> therefore only defined) for a vector field. Your solution field is scalar
> though, which presents a bit of an issue. On the face of it you'd
Dear Kyusik,
So my new question is , in deal.II, could I get local divergence of certain
> function to get surface integral?
>
>>
Yes it is. You can extract the divergence of a function using, for example,
the FEValuesView function get_function_divergences
Dr. Wolfgang Bangerth,
Thank you very much for your kind reply.
But, could I have one more question?
>
> I don't know whether the problem really comes from that, but you can't
> take
> the second derivative of a finite element solution without problem. The
> issue
> is that it exists,
On 05/14/2017 01:57 AM, hanks0...@gmail.com wrote:
I guess this problem comes from the second derivatives of solution.
I don't know whether the problem really comes from that, but you can't take
the second derivative of a finite element solution without problem. The issue
is that it exists,
