"Like Bruno already said in other words, you are starting at the wrong end of the question. In a first step, define mathematically *what* it is you want to do (and justify why this is the right choice). Then, in a second step, one can think about *how* to implement this."
I need this function (triangulation) for post-processing, but also during my assemble routine. Basically, the values of this function at some points are assembled into my linear system. But it may happen that I have to evaluate the function at a point which is not contained in its triangulation, since I do not know the bounds a priori. Currently, my program is aborted if I would need to evaluate at a point outside the triangulation. I want to circumvent this by extrapolating the function somehow (bilinear, ...). The function should be increasing in x-and y-direction and is quite smooth at the boundary. Any suggestions? Thank you, Math Wolfgang Bangerth schrieb am Mittwoch, 7. Juni 2023 um 16:33:32 UTC+2: > On 6/6/23 14:24, Mathieu wrote: > > > > for a post-processing step, I have to evaluate my temperature field at > some > > points outside the mesh close to its boundary. > > > > I know that shape functions are not defined outside the mesh, that's why > I > > wanted to extrapolate them. > > My idea was to use the gradient of the temperature field to come up with > an > > extrapolation. > > But I do not know if that's reasonable. > > Like Bruno already said in other words, you are starting at the wrong end > of > the question. In a first step, define mathematically *what* it is you want > to > do (and justify why this is the right choice). Then, in a second step, one > can > think about *how* to implement this. > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: bang...@colostate.edu > www: http://www.math.colostate.edu/~bangerth/ > > > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/d5c19a5e-dcfc-4d24-a66a-b8921031d34an%40googlegroups.com.
