> > >> GAMG is use for AMR problems like this a lot in BISICLES. >> > > Thanks for the reference. However, a quick look at their paper suggests > they are using a finite volume discretization which should be symmetric and > avoid all the shenanigans I'm going through! >
No, they are not symmetric. FV is even worse than vertex centered methods. The BCs and the C-F interfaces add non-symmetry.
