论文标题
通过多孔媒体集体运输液滴
Collective transport of droplets through porous media
论文作者
论文摘要
在岩石或其他多孔介质内部的狭窄毛孔网络中，可变形颗粒的流动（例如液滴）的流动是一系列应用中的关键，从增强的油回收和水过滤到细胞芯片分类的实验室。集体动力及其对流动的影响知之甚少。在这里，使用液滴作为原型，我们表明，对于单个粒子会被困在孔通道的条件下，可能会发生集体传输。当一系列液滴被捕获时，流体流量会显着影响，从而导致整个孔通道的压力差增加，从而使颗粒通过通道挤压。我们分析了单滴以流过一个孔并得出相应键号的条件。我们还获得了多孔介质中液滴集体流动的规则。
The flow of deformable particles, such as droplets, dragged by a fluid, through a network of narrow pores inside rocks or other porous media is key in a range of applications, from enhanced oil recovery and water filtration to lab on a chip sorting of cells. The collective dynamics and its impact on the flow are poorly understood. Here, using droplets as a prototype, we show that collective transport can occur for conditions under which a single particle would get trapped at a pore channel. When a series of droplets gets trapped, the fluids flow is affected significantly, leading to an increase of the pressure difference across the pore channels, which in turn squeezes the particles through the channels. We analyze the conditions for a single droplet to flow through one pore and derive the corresponding Bond number. We also obtain a rule for the collective flow of droplets in porous media.
