Application of effective medium approximation for the determination of the permeability of condensable vapours through mesoporous media

Single-bond effective medium approximation (EMA) is considered as an alternative method of modelling transport of condensable vapors in mesoporous structures. EMA is simpler and requires minimal computational time and effort compared to the network model. The effects of pore size distribution, average pore radius, pore connectivity, fluid properties, relative pressure, total pressure drop on vapor permeability are presented and compared with the corresponding results of the network model. The difference between the two models is detectable only in the transition to liquefaction regime, where the presence of the neighboring pores becomes significant.