So you get this noise with a regular grid in p4est. So the same grid as will Plex, and you are not getting the same results.
I don't know of any difference from p4est on a non-adapted grid. Can you reproduce this with ex11? Matt and Toby could answer this better. On Wed, Jun 17, 2020 at 1:33 PM MUKKUND SUNJII <mukkundsun...@gmail.com> wrote: > Greetings, > > I am a master’s student working on the shallow water model of the TS > example 'ex11.c' as part of my thesis. Therefore, I am working with > DMForest for the implementation of adaptive grids. I have a question and an > observation. > > I am trying to find relevant information about interpolation that takes > place through the routine DMForestTransferVec. Perhaps it could be my > inability to find it, but I am unable to locate the implementation of the > routine > > (forest->transfervec)(dmIn,vecIn,dmOut,vecOut,useBCs,time). > > Any information on this particular routine is highly appreciated. > > Furthermore, I have developed a well balanced Riemann Solver that includes > topography in the model. In the process of testing both the non-adaptive > and adaptive version, I found that my results differed when I changed the > type of DM. For instance, when I run a scenario in a fixed, non-adaptive > grid with a DM of type 'P4est', I find that the well balanced nature is > lost due to small perturbations all across the domain. However, this does > not occur when I use a DM of type ‘plex’. Is there a radical change in the > routines between the two DM’s? This is not as much of a question as it is > an observation. > > Thank you for all of your suggestions! > > Regards, > > Mukkund > > >
