[dune-pdelab] How to impose pure Neumann boundary condition

[Steffen Müthing]

Hi Jizhou,

for an example, look at src/course-examples/example01a_Q1.hh in the dune-pdelab-howto module:
As a pure Neumann space does not have any kind of built-in constraints (the Neumann
boundary conditions enter through your weak form), just choose Dune::PDELab::NoConstraints
as the constraints parameter for your GridFunctionSpace.

Just make sure you still end up with a well-defined problem if you don't have any Dirichlet constraints…

Best,

Steffen


Am 15.11.2012 um 17:42 schrieb Jizhou Li:

> Hi,
> I am very new to dune-pdelab. On the pdelab-howto-article page 132-133, it says dune-pdelab can handle pure Neumann boundary condition. Does anyone know how to get it done? Or just to construct finite element space with {q:  ∫q dΩ=0}. I think it would be helpful for to have an example on howto-article for beginners.
> 
> Thanks
> 
> Jizhou Li
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> dune-pdelab mailing list
> dune-pdelab at dune-project.org
> http://lists.dune-project.org/mailman/listinfo/dune-pdelab

Steffen Müthing
Universität Stuttgart
Institut für Parallele und Verteilte Systeme
Universitätsstr. 38
70569 Stuttgart
Tel: +49 711 685 88429
Fax: +49 711 685 88340
Email: steffen.muething at ipvs.uni-stuttgart.de

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