Hi I'm working on a finite volume implementation using DMPlex. I was wondering what the best-considered way to add cell variables to the DM that we don't want to be part of the ksp/snes solve. As far as I can tell, if I add an extra section with those, they will still be part of the F and U vectors in the solver callbacks (to be expected). But my impression is that that will just inflate the system size even if they have an F=0? Or is the solver able to notice variables that are not dependent for the solve.
Alternatively, I have been just making a separate DM with those but that feels a bit clunky especially if any mesh refinement occurs. Any advice would be much appreciated. Thanks Nicholas -- Nicholas Arnold-Medabalimi Ph.D. Candidate Computational Aeroscience Lab University of Michigan
