Hi, Daniel, I see. Thank you very much. So, I think our method may be available as long as it can separate the face.
Best, Xiang On Tuesday, 13 October 2020 at 14:38:29 UTC-7 d.arnd...@gmail.com wrote: > Xiang, > > deal.II doesn't have functionality to create separate cells sharing a face > but only to join them. Hence, whatever input you provide to > Triangulation::create_triangulation() must have these faces already. GridIn > should work for that if the faces are disjoint in the input file. > > Best, > Daniel > > Am Di., 13. Okt. 2020 um 11:20 Uhr schrieb 孙翔 <shya...@gmail.com>: > >> 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? >> Please see the attached figure. 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+un...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/dealii/a837e332-a242-45b9-b79b-a23a8f37deb0n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/dealii/a837e332-a242-45b9-b79b-a23a8f37deb0n%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/ea86e520-6fd6-4c8c-bd26-0e7b42b45768n%40googlegroups.com.
