[Dune] Local Refinement in a DUNE Grid

[Andreas Dedner]

If you need cubes and conform then you have to take UG but will also have
to handle pyramids and prism in your fe scheme - you cannot have a locally
refined grid with only cubes.

Andreas


On 12/26/2010 11:46 AM, Oliver Sander wrote:
> That depends on the grid manager.  UGGrid and AlbertaGrid will ensure that
> automatically, ALUGrid will not (and that's not a bug).
>
> --
> Oliver
>
> Am 26.12.2010 12:41, schrieb 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 
>> <mailto: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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>>
>>
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>
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