[petsc-users] ADI

[Matthew Knepley]

On Tue, Mar 6, 2012 at 9:10 AM, Kharche, Sanjay <
Sanjay.Kharche at liverpool.ac.uk> wrote:

>
>  Dear All
>
>  Can someone suggest me for how to solve the 3D heat equation implicitly
> using ADI please.
>
>  In brief, I would like to solve the 3D heat equation with a constant
> diffusion using finite differences. In 1D, I am using the Thomas algorithm
> in serial. However, since the 3D problem is large, I need to parallelise
> it. Any pointers will be appreciated.
>

ADI is from the last century. Use PETSc's Geometric Multigrid. If you look
at SNES ex50 and the tutorial runs for it, you can
see how this works.

   Matt


> thanks
> Sanjay
>
>


-- 
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
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