Wouldn't it make the most sense to do it in a variationally consistent
manner
rhs_a = int{ N_a delta(x - x_o) }
where x_o is the location of the point source?
-sanjay
On 4/13/18 7:46 PM, Matthew Knepley wrote:
On Fri, Apr 13, 2018 at 1:40 PM, Robert Walker <[email protected]
<mailto:[email protected]>> 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
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