[Dune] Topological changes in the grid

[Carsten Gräser]

Am 20.02.2013 22:42, schrieb 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.
For completeness:
A subgrid is only subposed to change by refinement or coarsening using
the grid interface. Data transfer can then be done 'as usual'.  You can
also query if adaptation of the subgrid required an adapt() for the
hostgrid to do the necessary transfer for data attachted to the latter.

Best,
Carsten



> 
> 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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 555 bytes
Desc: OpenPGP digital signature
URL: <https://lists.dune-project.org/pipermail/dune/attachments/20130225/252e0063/attachment.sig>