Relating capillary pressure to interfacial areas

摘要: [1] Experiments were performed on transparent two-dimensional microfluidic porous systems to investigate the relationships among capillary pressure and interfacial areas per volume between two fluid phases one solid phase. Capillary pressures calculated from observed curvature of wetting-nonwetting interface, these correlated closely externally measured values applied pressure. For each pressure, system established mechanical equilibrium characterized by stationary interfaces, uniform curvatures across model, random surface normals. To study areas, we compare curvature-based with differential change in as a function wetting-phase saturation. The contributions experimental measurements are found be nearly independent These results suggest that other must significant when imbibition drainage processes result saturation gradients.