Thank you Daniel. I was using penalties before taking this route, because I had artifacts at the boundary faces present at a corner between a Dirichlet and a Neuman BC edge. A problem I didn't have with CG. My first intuition was to apply BCs strongly to fix this, but I don't think it will even if I were able to interpolate.
It's cool how dealii is consitent with the maths. Maybe @Wolfgang would agree that this should have thrown an exception in Debug? On Wednesday, January 4, 2023 at 9:31:34 PM UTC+2 d.arnd...@gmail.com wrote: > Abbas, > > Yes, FE_DGQ only defines dofs in the interior of cells. Thus, trying to > interpolate the boundary has no effect. You would normally use penalty > terms to prescribe boundary values for DG methods. > > Best, > Daniel > > On Wed, Jan 4, 2023 at 6:04 PM Abbas <abbas.b...@gmail.com> wrote: > >> Hello, >> >> The VectorTools::interpolate_boundary_values function works for >> interpolating fe_Q<dim> functions but not fe_DGQ<dim> . >> Was this meant to be the case? >> I attached a minimal code that illustrates this. >> >> >> -- >> 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+un...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/dealii/0a8d1da6-e564-45de-bc3d-1f5a9d5dfad9n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/dealii/0a8d1da6-e564-45de-bc3d-1f5a9d5dfad9n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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/a8f4659b-c4e8-4a3d-81fc-ed802c7bd3bcn%40googlegroups.com.
