[Dune] Local Refinement in a DUNE Grid

[S. Swayamjyoti]

Now, will that ensure that the refined grids are *conforming* with the other
level elements?

On Sun, Dec 26, 2010 at 12:36 PM, Jö Fahlke <jorrit at jorrit.de> wrote:

> Am Sun, 26. Dec 2010, 06:18:46 +0100 schrieb S. Swayamjyoti:
> > I am using DUNE for creating a grid over which I will apply Finite
> Element
> > Methods. I have created a structured 3D grid of cubes. Now, I want to
> refine
> > the cubes at the center of the domain. I require fine meshing for cubes
> at
> > the center while course meshing is OK as we go outward from the center.
> > Course meshing away from the center will also save me computational cost.
> >
> > Could someone please suggest how to refine the grids at the center - if
> > there is a local refinement class? Please also suggest the header file to
> > include for the same.
>
> You have to iterate over the elements (the codim-0 entities) of the
> LeafGridView.  For each element that you want to refine, call grid.mark(1,
> elem).  Once Iteration is done, call grid.preAdapt(), grid.adapt(), and
> grid.postAdapt().  Repeat until you are satisfied with the grid.
>
> If you know a priori that a certain element can be refined n times
> uniformly,
> you can also tell that to grid.mark() by calling grid.mark(n, element)
> instead.
>
> Bye,
> Jö.
>
> --
> Sie können die Unversität jetzt ausschalten.
>
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