Hi Jonothan, Maybe I am missing something here, but in Daniels previous answer (which I actually incorporated into the two examples in my posting) he showed how to have the flux across a boundary be non-zero and then go to zero. This boundary represents the boundary between my heated section and the rest of the model.
I am seeking a way to make the flux INTO the circular section non-zero and then zero (like a laser would really heat it up), and then have regular diffusion "spread" the heat energy from that heated section into the complete model. Maybe a possible workaround (unless I find something better) would be to model the heating up of the heated section by an incoming flux (across say the fictitious vertical line of symmetry) and have D of this section set to a very large number thus causing "instantaneous" heating of this section ??? Thanks for taking the time to respond. David On Tue, Jun 2, 2009 at 8:09 PM, Jonathan Guyer <[email protected]> wrote: > > > On Jun 2, 2009, at 11:16 AM, david wende wrote: > > I really need a way to model more closely the fact that this whole >> circular section is heated >> by an external source for 3mS. >> > > Daniel showed this in his earlier email: > > > On May 20, 2009, at 2:55 PM, Daniel Wheeler wrote: > > # want flux to go to zero after a set time >> BCs = ( FixedFlux(faces=facesHeaters, value = -0.5 * (t < 3) )) >> > > > -- David Wende home +972-8-9353488 work +972-2-5886116 mobile +972-54-234-6479
