SIMULTANEOUS VAPOR AND LIQUID DIFFUSION IN PARTIALLY WETTED POROUS MEDIA

摘要: ABSTRACT In porous materials with pores containing both a gas and liquid phase each mixture of several components mass transfer by diffusion may occur simultaneously in phases. An effective diffusivity is required order to describe these effects when homogeneous model used. Unsteady-state experiments were performed such that bed glass beads partially saturated glycerol was either loaded passing wet air or dried removing water 2-propanol initially mixed the glycerol. The obtained applying equation unsteady-state observed change mass. Superposition limiting cases single-phase vapor systems yields simple describes as function pore saturation correlates well measured values.