Thanks professor, that helped. It works now. For the record I used Boolean fragments (coherence), please find the updated result figure. [image: updated tempreture.png] On Thursday, August 19, 2021 at 6:57:43 AM UTC+2 Jean-Paul Pelteret wrote:
> Hi Ibrahim, > > My guess is that the mesh has been exported without the connectivity > between the parts being enforced. So even though the physical vertices of > the mesh overlap where you have different parts, there are two or more > distinct vertices that lie on top of one another and the “intersecting” > parts of the geometry are therefore disconnected from one another. You can > normally fix this within the meshing software by using an “Imprint” > operation (it might be called something else in your specific software). > > Another approach which might work (depending on which finite elements you > are using) is that you can use the AffineConstraints to effectively tie the > two overlapping degrees of freedom from each region together. But you’d > have to manage this yourself. You can look at > > https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#how-do-i-get-the-degree-of-freedom-indices-at-vertices > to see how you can get the indices for DoFs with support at vertices, and > these functions might also be of use in this regard: > > https://dealii.org/developer/doxygen/deal.II/namespaceDoFTools.html#a5514e4f59ea659f63953d62ca429eaff > > https://dealii.org/developer/doxygen/deal.II/namespaceDoFTools.html#a06b3c33925c1a1f15de20deda20b4d21 > > https://dealii.org/developer/doxygen/deal.II/namespaceDoFTools.html#a8b97e816b29ecf963370a9d8b349828f > > I hope that this helps, > Jean-Paul > > On 19. Aug 2021, at 04:39, Wolfgang Bangerth <bang...@colostate.edu> > wrote: > > On 8/18/21 9:20 AM, ibrahim zawra wrote: > > Thanks a lot that helped, I applied symmetric<2,dim> tensor because it is > a heat problem. I also implemented the convection boundary condition. I > have a problem in the results, it seems the contact between surfaces is not > detected automatically, I want to model such contact.Please I will be > grateful for your guidance. > > > You will have to explain more what you are doing, what the symptoms are, > what you have already tried, what worked and what doesn't. We can't see > from just one picture what might possibly be wrong. > > 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+un...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/dealii/d8166e4d-06e6-7da4-e258-9c936fed2ce8%40colostate.edu > . > > > -- 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/8e58c07f-2747-4efa-bb2c-f53b5a5893afn%40googlegroups.com.
