cellSet filter new boxToCell (1.5 -10 -10) (2 10 10)
cellSet leftFluid new boxToCell (-10 -10 -10) (1.5 10 10)
cellSet rightFluid new boxToCell (2 -1 -1) (10 10 10)

faceSet cycLeft new cellToFace filter all
faceSet cycLeft subset cellToFace leftFluid all

faceSet cycRight new cellToFace filter all
faceSet cycRight subset cellToFace rightFluid all

