[Dune] Internal boundary surfaces via the Dune grid approach ???]

[Andreas Dedner]

-------- Original Message --------
Subject: Re: [Dune] Internal boundary surfaces via the Dune grid 
approach ???
Date: Fri, 13 Nov 2009 13:20:22 +0100
From: Andreas Dedner <dedner at mathematik.uni-freiburg.de>
To: Oswald Benedikt <Benedikt.Oswald at psi.ch>
References: <0C9CAFE8C4E5CA49884E636AE1D7CD690358D906 at MAILBOX0B.psi.ch>

Hi,
prehaps you could explain in more detail what you expect of an internal
boundary...
If the idea is just to have the intersection iterator return a boundary
at some internal faces then that is not too difficult to do (at least
using ALU/Alberta). Just double the vertices at this boundary as
demonstrated in the attached dgf files.
Best Andreas


Oswald Benedikt wrote:
> Dear Dune,
> 
> for the implementation of a boundary integral approach, applied to a finite element time domain electromagnetics algorithm
> we need to evaluate certain field quantities on internal boundaries, i.e. on a boundary that is contained within the volume
> mesh. As far as I know, this is not (yet?) supported in Dune ?
> 
> Since this class of algorithms may become quite important in the future, do you have any idea if this is planned ?
> 
> If not, how should we do this ? 
> 
> Just find out if a triangle is adjacent to 2 specific volume domains ? This may be viable but still be somewhat 
> inefficient.
> 
> 
> Thanks! Benedikt
> 
> 
> 
> ------------------------------------------------------------------------------------------------------------------
> Benedikt Oswald, Dr. sc. techn., dipl. El. Ing. ETH, www.psi.ch, Computational Accelerator Scientist
> Paul Scherrer  Institute (PSI), CH-5232 Villigen, Suisse, benedikt.oswald at psi.ch, +41(0)56 310 32 12
> "Passion is required for any great work, and for the Revolution passion and audacity are required in big doses.", 
> Ernesto 'Che' Guevara, Letter to his parents.
> http://maxwell.psi.ch/amaswiki/index.php/User:BenediktOswald 
> ------------------------------------------------------------------------------------------------------------------
> 
> 
> 
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