Thanks for the clarification! I initially thought ghost neighbours would only include face neighbours. That solves the problem.
On Thu, Oct 22, 2020, 09:33 Wolfgang Bangerth <[email protected]> wrote: > On 10/21/20 7:46 PM, Doug Shi-Dong wrote: > > Thanks, yes, that should work well for 2D. I actually just thought of a > corner > > case (pun intended) in 3D. It is possible for a cell's vertex to be on a > > boundary, without any of its neighbour actually have a boundary face. > > Yes, precisely: None of the face neighbors have to be on the boundary. But > at > least one of the vertex neighbors have to be -- which is why the ghost > layer > consists of all of the vertex neighbors of locally owned cells. > > You can create the same situation in 2d, by the way: Start with a single > vertex and put 5 or more quadrilateral cells around it. Then put another > layer > of cells around those. Then remove one of the cells that are adjacent to > the > original vertex and look at the cell opposite from it. > > > > Any advice on how to approach this since the current processor would not > find > > it within its ghost cells? > > Yes, it will -- see above. > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: [email protected] > 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/CALC9H_mkpeFN75S0kLZNEweBWS8YaHS34h3wSAyf8E5Q4oDkew%40mail.gmail.com.
