[Getdp] Neuman boundary conditions for Electrostatic model
Christophe Geuzaine
geuzaine at acm.caltech.edu
Wed Oct 6 07:38:31 CEST 2004
Taras Danilchenko wrote:
> Dear friends,
> Sorry, for the stupid question (the book of A.Bossavit is on it's way to
> me): how can I set non-homogeneous Neumann boundary condition to the
> Electrostatic model (from GetDP Manual)?
> May be there is an examples? (I don't find any in mailing list and GetDP
> Wiki)
You didn't look hard enough ;-)
In the wiki, for example, http://geuz.org/getdp/wiki/ThermalProblem
contains a formulation with a Neumann BC ("Galerkin{[-Flux[],{T}]...").
Two things to pay attention to:
1) the domain of integration has to be included in the FunctionSpace
(cf. Sur_The/Tot_The in the wiki example)
2) you need to specify the appropriate Jacobian for the boundary
integration (cf. JSur in the wiki example)
Take care,
Christophe
--
Christophe Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org