[petsc-dev] 2D finite elements in 3D ambient space

Geoffrey Irving irving at naml.us
Mon Dec 2 21:59:33 CST 2013


On Mon, Dec 2, 2013 at 6:54 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> Matthew Knepley <knepley at gmail.com> writes:
>> I am agreeing with that. I just hate isoperimetric. Its terrible at really
>> resolving geometry.
>
> More precisely, it is terrible at resolving _conic sections_.

To make sure I understand, by "terrible" you mean only nth order
accurate, where n is the order of the material finite elements, right?
 I.e., exactly as terrible at finite elements are at resolving
deformed geometry?  Is there some additional badness about
isoperimetric?

Geoffrey



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