Thank you for your reply. It's fine with me to wait, as I got quite skeptical when no one answered even something like this. Thanks for your kind reply. The idea you said is wonderful for a starting point. It will take time also to implement my solver in dealii. I am very much looking forward to this. The answer I am expecting doesn't have to be specific to ORAS methods, so any suggestions or links to already attempted out of box linear solver or preconditioner are fully welcome.
It's completely fine, I can wait. Even sometime I thought this may not be the active group. Thanks again this is a wonderful starting point to think from. So I guess I have to think from algebraic level than from a geometry level. Thank you very much, On Thu, Jun 6, 2019, 11:47 Jean-Paul Pelteret <[email protected]> wrote: > Dear Tom, > > You’ve come to the right place to ask your question but, occasionally, it > takes some time for the right person to come along to be able to give a > meaningful answer to it. I, for example, have no familiarity with Additive > Schwarz methods, so I have no insights to share with you on that front. > With regard to your intermediate question, when traversing a grid it is > possible to ask a cell if a neighbour is not locally owned > <https://www.dealii.org/current/doxygen/deal.II/classCellAccessor.html#aa52e84398560d2213ba71909a81150d1> > or > is a ghosted cell > <https://www.dealii.org/current/doxygen/deal.II/classCellAccessor.html#a5d32a7f84929bd9fa9c63fd2493b4aca>, > something like > > for (auto cell : dof_handler.active_cell_iterators()) > for (unsigned int f=0; f<GeometryInfo<dim>::faces_per_cell; ++f) > if (!cell->at_boundary(f) && cell->neighbour(f)->is_ghost()) > // Do whatever you want... > > However, I don’t know if this is what you’re actually wanting to do in the > context of the greater question. Maybe someone else with experience in this > domain will chime in when they have the time (remember, this is a community > driven by volunteers). > > Best, > Jean-Paul > > On 05 Jun 2019, at 18:24, Tom Mathew <[email protected]> wrote: > > Is this a foolish question or this group don't entertain discussions ? > > On Sunday, May 26, 2019 at 7:29:43 AM UTC+2, Tom Mathew wrote: >> >> Dear all, >> I am a novice of dealii, but would like to work on it, if there is >> something which I am looking for. I would like to implement Optimized >> Restricted Additive Schwarz iterative solver or preconditioner for my >> problem, may be by inheriting the dealii linear algebra solver or iterative >> solver classes. Will it be possible to access the interface between the >> subdomains (interface boundary), so that I can impose optimized >> transmission (Robin) conditions for the iterative method. If not, any >> possible alternative directions or suggestions are welcomed. I am working >> on indefinite Maxwell's equations in complex algebra, so I guess I will be >> working with block matrices in dealii. Or if there is an example or project >> where the local subdomain matrices has been modified or any Schwarz methods >> has been tried can also be wonderful place to start for me. >> Thanks in advance, >> Best regards, >> Tom >> > > -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/c3e47960-7fbb-4298-8ed7-6b5cc269fd34%40googlegroups.com > <https://groups.google.com/d/msgid/dealii/c3e47960-7fbb-4298-8ed7-6b5cc269fd34%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > > > -- > 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 a topic in the > Google Groups "deal.II User Group" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/dealii/MWTLVYFG_8I/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/5CB4477F-098A-4F73-A424-294482C2A713%40gmail.com > <https://groups.google.com/d/msgid/dealii/5CB4477F-098A-4F73-A424-294482C2A713%40gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/CADS8BE4gBXw8U5n1VDaR%3DNYbRJhugWqWYpNSB0E%3DmXYaJ1R_Vg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
