What do you mean by point sources? Dirac's delta terms ? If so, these translates into basis function evaluations , and should not be hard to support it, but it will require a different API. Matt?
Il Ven 13 Apr 2018, 20:51 Robert Walker <rlwal...@usc.edu> ha scritto: > Ok, let me rephrase that...something like way FEniCS (if i remember > correctly) handles this ... between two values with a very small difference > between them on each axis? Is there an example of something like that to > use as a security blanket from which to expand? > > 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 > rlwal...@usc.edu > > On Fri, Apr 13, 2018 at 10:46 AM, Matthew Knepley <knep...@gmail.com> > wrote: > >> On Fri, Apr 13, 2018 at 1:40 PM, Robert Walker <rlwal...@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 >>> rlwal...@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/ >> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.caam.rice.edu_-7Emk51_&d=DwMFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=BWOpUsAp5dvI5cUiP4uZxQ&m=NhwycEffStNWdPC1pT8qnGZOOnaReNM_T0V8yU1UKHE&s=qwCDj6rCWjIJ1T-NmL3j1bZCdrFx5cOVzTA-l0e0W0o&e=> >> > >
