Hi, Daniel, Thank you very much. So, if I want to disjoint the faces, how should I do using dealII or I need to disjoint them manually? If I manually disjoint them, should I duplicate the joint nodes and assign them with the new number, then assemble the adjacent element with the duplicated nodes? I am not sure if Grid_in can read it.
Best, Xiang On Monday, 12 October 2020 at 11:09:31 UTC-7 d.arnd...@gmail.com wrote: > Xiang, > > Adding to Bruno's response: If the interface you want to apply Dirichlet > boundary conditions to stays the same through the whole simulation, then > treating the corresponding faces as disjoint while creating your mesh might > be a better option. > Setting constraints yourself requires you to know how the degrees of > freedom map to function values (which depends on the finite element you are > using). FE_Q elements are nodal, though, so you can simply constrain the > degrees of freedom to the desired function value at the corresponding > support points. > > Best, > Daniel > > > Am Mo., 12. Okt. 2020 um 09:21 Uhr schrieb Bruno Turcksin < > bruno.t...@gmail.com>: > >> Xiang, >> >> You cannot apply a boundary condition on an internal face. You need to >> use the AffineConstraint >> <https://dealii.org/current/doxygen/deal.II/classAffineConstraints.html> >> class to impose the constraints yourself. This is what we use internally to >> apply Dirichlet boundary condition. >> >> Best, >> >> Bruno >> >> >> >> On Monday, October 12, 2020 at 2:10:15 AM UTC-4 shya...@gmail.com wrote: >> >>> Hi, I want to model injecting heat fluid into a tiny fracture which is >>> inside a block. The fracture is modeled as an interface which is an >>> internal face shared by two hex elements. Is it possible for us to apply >>> the Dirichlet boundary condition on the interface? If not, how should I do >>> it? >>> >>> Best, >>> >>> Xiang >>> >> -- >> 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/3840f39f-e3ae-4d76-886b-c3658bcade13n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/dealii/3840f39f-e3ae-4d76-886b-c3658bcade13n%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/5cffd4a0-3c0a-4e84-977c-932a404e468an%40googlegroups.com.
