Re: [deal.II] interpolating boundary values from a previously found FE solution
On 04/15/2018 07:34 PM, Jaekwang Kim wrote: Is there any example tutorial related to the first approach? _/"You can build a ConstraintMatrix object that sets boundary DoFs of V to the corresponding values of U. This should be easy to do." /_ None that I would know of, but you build constraint matrices by calling constraints.add_line (i); constraints.set_inhomogeneity(i, xi); if you want to constraint degree of freedom 'i' to value 'xi'. In your case, 'i' are all of the DoFs located at the boundary, and xi is the value you need to set the DoF to. Best W. -- Wolfgang Bangerth email: bange...@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. For more options, visit https://groups.google.com/d/optout.
Re: [deal.II] interpolating boundary values from a previously found FE solution
Dr. Bangerth Is there any example tutorial related to the first approach? *"You can build a ConstraintMatrix object that sets boundary DoFs of V to the corresponding values of U. This should be easy to do." * On Friday, March 30, 2018 at 8:15:23 AM UTC-5, Wolfgang Bangerth wrote: > > On 03/29/2018 11:18 PM, Mustafa Aggul wrote: > > > > suppose I assemble a system and solve it. Say my solution is U. In the > next > > step, I want to solve a different problem for V. My desire is to make V > > exactly same as U on the boundaries. > > > > You can build a ConstraintMatrix object that sets boundary DoFs of V to > the > corresponding values of U. This should be easy to do. > > Alternatively, you could solve for a function D so that V=U+D. D should > then > simply have zero boundary values. > > 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. For more options, visit https://groups.google.com/d/optout.
Re: [deal.II] interpolating boundary values from a previously found FE solution
Thanks for your response. I did some sort of combination of the both arguments. It works fine now. Best, Mustafa. -- 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. For more options, visit https://groups.google.com/d/optout.
