dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

Yes, it's fairly easy now when I think about it. I might just add some
functionality for this in DOLFIN (and bybass the complications of
adding this to UFL/FFC/UFC).

--
Anders


On Tue, Apr 12, 2011 at 07:51:58PM -0500, Peter Brune wrote:
> It's pretty easy to do this for any point on the mesh for general function
> spaces using basis function evaluations if you know what cell your point
> resides in (even in the mixed/vector case).  Right now I have it implemented as
> a boundary condition, but I sort of agree that it really should look like it's
> a coefficient if people are going to use it generally.
>
> - Peter
>
> On Tue, Apr 12, 2011 at 2:00 PM, Anders Logg <
> question152565@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
>     Question #152565 on DOLFIN changed:
>     https://answers.launchpad.net/dolfin/+question/152565
>
>     Anders Logg proposed the following answer:
>     On Tue, Apr 12, 2011 at 05:54:02PM -0000, Garth Wells wrote:
>     > Question #152565 on DOLFIN changed:
>     > https://answers.launchpad.net/dolfin/+question/152565
>     >
>     > Garth Wells proposed the following answer:
>     > You can add the source term to the RHS vector. It would correspond to to
>     > a Delta function at a node. The trick is to find the right node.
>
>     It would be good though to be able to handle this without the need for
>     setting the Delta function at a node (but at an arbitrary point).
>
>
>
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