[Dune] Topological changes in the grid

[Steffen Müthing]

Hi Andrea,

If you want to track multiple subsets of your grid at once, there is also MultiDomainGrid
(http://users.dune-project.org/projects/dune-multidomaingrid). Like dune-subgrid, it is a
meta grid, i.e. it wraps your existing grid and provides additional functionality.

The main differences between dune-subgrid and dune-multidomaingrid are that MultiDomainGrid
can track several subdomains at once, but the subdomains always span the complete refinement
hierarchy, while SubGrid only supports a single subdomain, which can be restricted to a subset of
the refinement hierarchy of the host grid (that allows for things like doing adaptive refinement on
YaspGrid, which is a regular grid and wouldn't normally support such a thing).

I don't know about dune-subgrid, but dune-multidomaingrid also has an API similar to the
preAdapt(), adapt(), postAdapt() interface for refinement to help with data transfer when subdomains
change.

Steffen


Am 20.02.2013 um 16:03 schrieb Uli Sack:

> Hi Andrea!
> Without having fully understood what you need/want, I would direct your attention to dune-subgrid
> http://numerik.mi.fu-berlin.de/dune-subgrid/index.php
> 
> There you should be able to mark any set of elements of a host grid to represent your computational grid - ie. disconnected sets are possible afaik. The subgrid object may be changed subsequently to any other set of hostgrid elements. Data interpolation to the new subgrid may be done by means of the hostgrid.
> 
> Maybe this helps in some way.
> 
> Uli
> 
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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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