some trouble about FEnedelecSZ with hanging node

[xuhong liu]

I recently read a paper < Algorithmic realization of the solution to the sign conflict problem for hanging nodes on hp-hexahedral N´ed´elec elements >. In this paper, it said that it give a method to deal with hanging node using FE Nedelec element, but when i try to constrain the Stiffness matrix, it show me a error, i want to know how to do??

[Wolfgang Bangerth]

On 6/27/23 23:54, xuhong liu wrote:
> In this paper, it said that it give a method to deal with hanging node using
> FE Nedelec element, but when i try to constrain the Stiffness matrix, it show
> me a error, i want to know how to do??

Xuhong,
the error message tells you the story: The element you are trying to use
apparently does not implement hanging node constraints. Since you don't show
the code, I can only assume that you use the FENedelecSZ element, which indeed
does not implement these constraints.

The paper suggests that it does, but I don't think that the implementation of
these constraints have ever been submitted as a patch to deal.II. It would
probably be useful for you to ask the authors about the status of the changes
they must have made.

Best
W.

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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/

[Thomas WICK]

Dear Xuhong,

the code is internally there with us and the paper is submitted. We are
currently further polishing, documenting etc. the code, which still may
take approx. 3-6 months, because
Sebastian who did the implementation also needs to write his
dissertation now. For this reason, I want to ask a bit for patience, but
the clear goal is to submit
this code to the official deal.II library.

Best regards,

Thomas W.

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Prof. Dr. Thomas Wick
Managing Director of the
Institut für Angewandte Mathematik (IfAM)

Leibniz Universität Hannover (LUH)
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30167 Hannover, Germany

Tel.: +49 511 762 3360
Email: thoma...@ifam.uni-hannover.de
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www: https://thomaswick.org
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Am 28.06.23 um 16:01 schrieb Wolfgang Bangerth:

[xuhong liu]

Thank you for your reply and wish you a wonderful day! ^ ^

Best wishes

Xuhong Liu