[petsc-users] [PATCH 2/2] Call KSPSetFromOptions before setting fieldsplit-specific options

[Umut Tabak]

On 09/08/2013 05:51 PM, Jed Brown wrote:
> Umut Tabak <u.tabak at tudelft.nl> writes:
>
>
> Looks like it's converging, albeit somewhat slowly, and your operator
> scaling is terrible (not necessarily a problem, but full-space
> fieldsplit methods work much better if you non-dimensionalize so that
> the fields have similar scales).

Indeed, something I am aware of,

A00

is ill-conditioned

A11

block is indefinite, even worse.

I have been looking for some scaling options that might work but until 
now no success so far...