[petsc-users] PETSc / AMRex

[Matthew Knepley]

On Tue, Jun 21, 2022 at 10:01 AM Mark Adams <mfadams at lbl.gov> wrote:

> Hi Bernigaud,
>
> To be clear, you have SNES working with DMDA in AMRex, but
> without adapting dynamically and you want to know what to do next.
>
> Is that right?
>

I will let Mark answer the AMReX question since he is more knowledgeable.

I just wanted to note that PETSc has good integration with the p4est (
www.p4est.org) AMR package. We can manage all parallel data and
solver integration with it out of the box. Mark also has extensive
experience here.

  Thanks,

     Matt


> Mark
>


> On Tue, Jun 21, 2022 at 11:46 AM Bernigaud Pierre <
> pierre.bernigaud at onera.fr> wrote:
>
>> Greetings,
>>
>> I hope you are doing great.
>>
>> We are currently working on parallel solver employing PETSc for the main
>> numerical methods (GMRES, Newton-Krylov method). We would be interested
>> in combining the PETSc solvers with the AMR framework provided by the
>> library AMReX (https://amrex-codes.github.io/amrex/). I know that within
>> the AMReX framework the KSP solvers provided by PETSc can be used, but
>> what about the SNES solvers? More specifically, we are using a DMDA to
>> manage parallel communications during the SNES calculations, and I am
>> wondering how it would behave in a context where the data layout between
>> processors is modified by the AMR code when refining the grid.
>>
>> Would you have any experience on this matter ? Is there any
>> collaboration going on between PETsc and AMReX, or would you know of a
>> code using both of them?
>>
>> Respectfully,
>>
>> Pierre Bernigaud
>>
>>

-- 
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

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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