Prediction of Diffusion Coefficients in Porous Media Using Tortuosity Factors Based on Interfacial Areas.

Presents an interfacial area ratio (IAR) model for the prediction of diffusion coefficients as a function of the degree of water saturation. Definition of tortuosity factor in the IAR model; Factor that affects diffusion behavior in unsaturated media; Diffusion coefficients for conservative solutes as a function of water content.