dolfin team mailing list archive

["Garth N. Wells" <gnw20@xxxxxxxxx>]

On 22/02/11 07:51, Anders Logg wrote:
> I'd like to implement this blueprint for 0.9.10:
> 
> https://blueprints.launchpad.net/dolfin/+spec/attach-subdomains-to-form
> 
> In addition, I'd like to remove the cell_domains,
> exterior_facet_domains and interior_facet_domains arguments from the
> assembler. It seems overkill to have three different ways to specify
> the domains and the logic becomes complex for handling which data
> overrides if many are specified. We could also remove these arguments
> from VariationalProblem.
> 
> We would then have two ways to specify the subdomains:
> 
> 1. As part of the Mesh (MeshData)
> 
> 2. As part of the form
> 
> The SystemAssembler would then need to rely on (1).
> 
> Comments and objections?
> 

What's the advantage of having two methods? Why not just have one?

I'd would be happy to see subdomains as part of MeshData, but I would be
reluctant to use the existing data structures because I find them cryptic.

We could have cell domains become part of the mesh .xml files - this
would be helpful because mesh generators can often define domains, and
it would be handy to use this data easily (by supporting it in
dolfin-convert).

Garth

> --
> Anders
> 
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