Two-phase porous-media flow
= Two-phase porous-media flow
Immiscible fluids share pore space, with each phase's <Darcy flux> determined by its pressure, viscosity and <relative permeability>. <Fluid saturation> specifies how much pore space each phase occupies. A <capillary pressure> couples their pressures, while their individual <mass conservation> laws determine displacement and saturation evolution.