[dune-pdelab] Instationary Navier-Stokes equations with Finite Volume method : Getting the velocity components at the center of the faces
Christian Engwer
christian.engwer at uni-muenster.de
Mon Sep 22 23:37:36 CEST 2014
Hi Christoph, hi Samuel,
> why do you write your own local elements? P1 element (Pk with
> k=1) should be right for finite volumes.
you mean P0... Q1-DG would be an option for your staggered grid approach.
Regarding the visualization you should use addCellData...
Christian
> If you insists on your own local element, you have do the
> change in the LocalCoefficient class where you have to
> calculate the LocalKey. You can find more information in
> dune-localfunctions how-to.
>
> BTW, what finite volume Stokes do you implement? Most of them
> do not fullfill the inf-sub condition and are thus not stable.
> Staggered grid is a well-known exception but it is difficult
> to implement in PDELab. I did it last year and the code is
> quite ugly and it does not include the symmetric velocity
> gradient.
>
> Bye
> Christoph
>
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Prof. Dr. Christian Engwer
Institut für Numerische und Angewandte Mathematik
Fachbereich Mathematik und Informatik der Universität Münster
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48149 Münster
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