PhasePresences as string in vtk writer
The PhasePresence indices in the 2p2c model are not the same for the different formulations (pnsw, pwsn). This does not seem to be on purpose and may be misleading, I propose to replace the indices by enums.
The PhasePresence indices in the 2p2c model are not the same for the different formulations (pnsw, pwsn). This does not seem to be on purpose and may be misleading, I propose to replace the indices by enums.