[petsc-users] examples of DMPlex*FVM methods

[Matthew Knepley]

On Thu, Apr 6, 2017 at 8:32 AM, Jed Brown <jed at jedbrown.org> wrote:

> Matthew Knepley <knepley at gmail.com> writes:
> > Okay, that makes sense. If I do not have fluxes matching the sources, I
> do
> > not
> > preserve montonicity for an advected field. I might need this to machine
> > precision
> > because some other equations cannot tolerate a negative number there. I
> will
> > write this one down.
> >
> > Why do I need it "for a projection in a staggered grid incompressible
> flow
> > problem".
> > This would mean I satisfy (I think)
> >
> >   \int_T div p = 0
>
> Matt Knepley can take the divergence of a scalar.


Yes, I forgot the grad. It is crazy here. Same question.

  Matt


> > meaning that there is a force balance on each cell to machine precision.
> If
> > I just care
> > about the fluid flow, this does not seem important.
>
>


-- 
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20170406/bed20b7b/attachment-0001.html>