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Does fenics also support isoparametric finite elements ?

+3 votes

Dear All

I am working on some code, that makes use of robin boundary conditions.
In three dimensions the accuracy of the boundary integral is limited by the
mismatch between the plane triangles and the spherical surface. On way of
improving the accuracy would be using isoparametric triangles that
would approximate the curvature better.

regards

Moritz

asked Jul 9, 2013 by moritzbraun FEniCS User (1,390 points)

1 Answer

+3 votes
 
Best answer

FEniCS does not as yet support isoparametric elements.

answered Jul 9, 2013 by Garth N. Wells FEniCS Expert (35,930 points)
selected Jul 9, 2013 by johanhake

Dear Garth
Thanks a lot for your answer!
Is support for isoparametric elements
on the horizon?

regards

M Braun

commented Jul 9, 2013 by moritzbraun FEniCS User (1,390 points)
How much work would be necessary to implement isoparametric second order triangles and tets
asked Jul 29, 2013 by moritzbraun FEniCS User (1,390 points)

I'm missing this feature too. What happened to Shawn Walkers patch that was discussed in year 2008 - at a quick glance it seems that he already implemented some code for this? (see thread http://www.mail-archive.com/dolfin-dev@fenics.org/msg04154.html ).

commented Nov 21, 2013 by Tuomas FEniCS Novice (350 points)

@Tuomas The patch was not a complete solution.

commented Nov 21, 2013 by Garth N. Wells FEniCS Expert (35,930 points)

Dear Colleagues

I want to n
again support the need for isoparametric
elements.
In the moment the only library I know that does isoparametric elements
is deal.II and its learning curve is a bit steeper than fenics.

regards

Moritz

commented Nov 21, 2013 by moritzbraun FEniCS User (1,390 points)
Update on isoparameteric elements
asked Jul 30, 2014 by moritzbraun FEniCS User (1,390 points)
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