[Dune] localFiniteElement for C1

[Carsten Gräser]

Hi,

Am 04.09.2015 um 10:15 schrieb Oliver Sander:
> Hi Carsten,
>> All this aside, I know that Maren-Wanda Wolf and Tobias Kies,
>> both here at FU Berlin, have implemented the Morley-element
>> (nonconforming C1, triangles) and the Bogner-Fox-Schmidt-element
>> (conforming C1, quadrilaterals), respectively. However,
>> both implementations are experimental, because the
>> former hacks around a) and b), whereas the latter is
>> tied to YaspGrid using knowledge on its implemen-
>> tation-defined element orientations.
> can you maybe post the code somewhere, so people can use it for guidance.
> Also, seeing the code may allow others to understand better exactly how
> you had to hack your way around the interface shortcomings.
I'll ask Maren and Tobias to provide the code. The hack for
the Morley-element is that it's a mix of a local and global
FE: It returns derivatives wrt the global coordinate
system, while the FEs themselves are meant to be stored
and returned by reference. Furthermore is adds a convenience
method evaluateHessian().

Best,
Carsten

> 
> Best,
> Oliver
> 
>>
>> The main reason for those shortcomings, is that we never
>> really discussed the needs of FEs with higher order regularity
>> requirements. Please notice that there is significant progress
>> on c) going on in the dune-functions module. I also hope, that
>> we can discuss this on the upcoming developer meeting.
>>
>> Best,
>> Carsten


-- 
Prof. Dr. Carsten Gräser
Freie Universität Berlin
Institut für Mathematik
Arnimallee 6
14195 Berlin, Germany
phone: +49 30 838 72637
fax  : +49 30 838 472637
email: graeser at mi.fu-berlin.de
URL  : http://page.mi.fu-berlin.de/graeser

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 473 bytes
Desc: OpenPGP digital signature
URL: <https://lists.dune-project.org/pipermail/dune/attachments/20150904/17ad8fc2/attachment.sig>