机械
非线性系统
间歇性
渗吸
流量(数学)
幂律
指数
多孔介质
压力梯度
航程(航空)
两相流
多相流
流体力学
热力学
体积流量
材料科学
多孔性
地质学
物理
岩土工程
数学
湍流
哲学
复合材料
统计
发芽
生物
量子力学
植物
语言学
作者
Yihuai Zhang,Branko Bijeljic,Ying Gao,Qingyang Lin,Martin J. Blunt
摘要
Abstract We measure the pressure difference during two‐phase flow across a sandstone sample for a range of injection rates and fractional flows of water, the wetting phase, during an imbibition experiment. We quantify the onset of a transition from a linear relationship between flow rate and pressure gradient to a nonlinear power‐law dependence. We show that the transition from linear (Darcy) to nonlinear flow and the exponent in the power‐law is a function of fractional flow. We use energy balance to accurately predict the onset of intermittency for a range of fractional flows, fluid viscosities, and different rock types.
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