The Impact of Surface Tension on the Oil-Water Stratified Flow
The stratified water-oil two—phase flow was modeled using VOF method in horizontal pipe and surface tension was taken into consideration using CSF model. It was found that the surface tension had great impact on the small density difference two-phase flow even in large diameter pipe, which would lead the interface curved and pressure gradient increased.
D. Z. Xu et al., "The Impact of Surface Tension on the Oil-Water Stratified Flow", Advanced Materials Research, Vols. 383-390, pp. 826-829, 2012