[petsc-users] High-dimensional DMDA

[Hittinger, Jeffrey A. F.]

Bummer.

Matt - Never is a very strong word.  Don’t underestimate the power of mappings and/or AMR. Also, sparse grid techniques haven’t (yet) proven to be particularly useful for kinetic problems.

Thanks for the quick response.

j-
-.-- -.-- --..
Jeffrey A. F. Hittinger
Center for Applied Scientific Computing
Lawrence Livermore National Laboratory
Office:  (925) 422-0993
FAX:     (925) 423-2993

From: Matthew Knepley <knepley at gmail.com>
Date: Tuesday, October 17, 2017 at 11:42 AM
To: Barry Smith <bsmith at mcs.anl.gov>
Cc: Undisclosed recipients <hittinger1 at llnl.gov>, "petsc-users at mcs.anl.gov" <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] High-dimensional DMDA

On Tue, Oct 17, 2017 at 2:32 PM, Barry Smith <bsmith at mcs.anl.gov<mailto:bsmith at mcs.anl.gov>> wrote:

  No and it is highly unlikely to appear (the 3d code is already too complicated and we tried to write a dimension independent version but that failed)

  But note that by using a dof argument > 1 one can handle some "4d" problems so long as one does no parallelize in the 4th dimension.

History: We did have a version for arbitrary dimension called ADDA written by a student of David Keyes, that exists
in the bowels of Git. We are unlikely to replicate it because regular grids in high dimension never seem like the right
thing to do.

  Thanks,

     Matt


   Barry

> On Oct 17, 2017, at 1:15 PM, Hittinger, Jeffrey A. F. <hittinger1 at llnl.gov<mailto:hittinger1 at llnl.gov>> wrote:
>
> Quick question: is there a version of the DMDA structured grid interface that supports dimensions higher than 3?
>
> j-
> -.-- -.-- --..
> Jeffrey A. F. Hittinger
> Center for Applied Scientific Computing
> Lawrence Livermore National Laboratory
> Office:  (925) 422-0993<tel:%28925%29%20422-0993>
> FAX:     (925) 423-2993<tel:%28925%29%20423-2993>



--
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.caam.rice.edu/~mk51/>
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