[petsc-users] PETScFE Point Source

[Matthew Knepley]

On Fri, Apr 13, 2018 at 1:40 PM, Robert Walker <rlwalker at usc.edu> wrote:

> Hello,
>
> Is there an example of application of a point source in one of the
> tutorial  PETScFE style examples? Ideally this would be some point on the
> interior, and not necessarily on a boundary.
>
> Thanks, and apologies in advance if this is a stupid question,
>

No, good question. You would have to decide what that meant in FEM terms.
All the internal integrals are done
with quadrature. So putting the source at a quadrature point would work,
although its a little difficult to know where
they will be. You could smooth it out a little, and check coordinates in
the forcing function. Last, you could check
for a "close enough" quadrature point and put it there. I think making a
slightly extended source is usually best.

  Thanks,

     Matt


> Robert
>
>
> Robert L. Walker
> MS Petroleum Engineering
> Mork Family Department of Chemicals and Materials Sciences
> University of Southern California
> ----------------------------------------------
> Mobile US: +1 (213) - 290 -7101
> Mobile EU: +34 62 274 66 40
> rlwalker at usc.edu
>



-- 
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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