WIP: Port compositional freeflow model and tests to new staggered

Open Ned Coltman requested to merge feature/compositional_freeflow into master

passing tests:

  • maxwellstefan (changed base epsilon)
  • Add back the maxstefan gnuplot output
  • channelnc mole diffusion
  • channelnc mass diffusion
  • channelnc advection
  • channelnc advection nocaching
  • channelncni advection
  • channelncni diffusion
  • density driven flow
Edited by Ned Coltman

Merge request reports