[petsc-users] multiblock question

[Shao-Ching Huang]

Thanks Matt. I will look into DMComposite.

Shao-Ching

On Fri, Oct 28, 2011 at 5:17 PM, Matthew Knepley <knepley at gmail.com> wrote:
> On Fri, Oct 28, 2011 at 11:48 PM, Shao-Ching Huang <huangsc at gmail.com>
> wrote:
>>
>> Hi
>>
>> We are planning a new (finite volume) multiblock code, in which each
>> block has logically structured mesh. We plan to create one DMDA for
>> one block (which could span across 1 or more processes; we already
>> have code). What would be the recommended PETSc-way to couple these
>> blocks together for implicit solves? We also need ghosted region
>> between two connected blocks (just like the ghost regions among the
>> subdomains within a DMDA) for interpolation.
>
> I think the idea here is to use a DMComposite to couple together these
> DMDAs. You
> would have to specify the coupling explicitly since we have no way of
> knowing how they
> are connected, but after that, the GlobalToLocal() should work just the
> same.
>   Thanks,
>      Matt
>
>>
>> Thanks.
>>
>> Shao-Ching
>
>
>
> --
> What most experimenters take for granted before they begin their experiments
> is infinitely more interesting than any results to which their experiments
> lead.
> -- Norbert Wiener
>