Measurement and modeling of hydraulic characteristics of unsaturated porous media with mixed wettability

摘要

The spatial distribution of the solid grain's wettability strongly influence the phase-intercon- nection, phase-flow and solute transport in unsaturated porous media. Non-uniform wetting conditions can arise in soils and aquifers from natural or anthropogenic impacts. In this study, a water-air system in porous media consisting of several types of granular materials is considered. A conceptual model for pressure-wise estimation of water saturation and relative unsaturated Hydraulic conductivity of such materials is proposed. The model uses the boundary water retention Curves and corresponding wetting angles of the pure components of the mixture as the input Parameters.