Nonlinear multiphase flow in hydrophobic porous media

被引:10
|
作者
Zhang, Yihuai [1 ]
Bijeljic, Branko [1 ]
Blunt, Martin J. [1 ]
机构
[1] Imperial Coll London, Dept Earth Sci & Engn, London SW7 2B1, England
基金
英国工程与自然科学研究理事会;
关键词
multiphase flow; RELATIVE PERMEABILITY; INTERMITTENCY; TOMOGRAPHY;
D O I
10.1017/jfm.2021.1148
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Multiphase flow in porous materials is conventionally described by an empirical extension to Darcy's law, which assumes that the pressure gradient is proportional to the flow rate. Through a series of two-phase flow experiments, we demonstrate that even when capillary forces are dominant at the pore scale, there is a nonlinear intermittent flow regime with a power-law dependence between pressure gradient and flow rate. Energy balance is used to predict accurately the start of the intermittent regime in hydrophobic porous media. The pore-scale explanation of the behaviour based on the periodic filling of critical flow pathways is confirmed through 3D micron-resolution X-ray imaging.
引用
收藏
页数:10
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