润滑剂涂层通道中的毛细管吸入
Capillary imbibition in lubricant coated channels
AI总结:
本文提出润滑剂浸渍表面液体传输的理论框架,发现小粘度下耗散在润滑层,前沿线性增长,外力下指数增长,可控制多相流,对微纳流体器件有重要意义。
摘要:
毛细管吸入是流体力学中许多基础和应用相关过程的基础。流动的一个限制是与限制固体的耦合,这会产生摩擦力。我们的工作提出了一个通用的理论框架,用于模拟润滑剂浸渍表面上的液体传输。我们表明,对于足够小的润滑剂粘度,耗散完全发生在润滑剂层中,导致前进前沿的线性增长。因此,外力引起指数前沿增长。这种控制多相流的新能力带来了新的实验挑战,这些挑战可能对微纳流体器件具有决定性作用。
英文摘要:
Capillary imbibition underpins many processes of fundamental and applied relevance in fluid mechanics. A limitation to the flow is the coupling to the confining solid, which induces friction forces. Our work proposes a general theoretical framework for the modeling of the transport of liquids in lubricant impregnated surfaces. We show that for sufficiently small lubricant viscosity, dissipation entirely occurs in the lubricant layer, resulting in a linear growth of the advancing front. As a result, an external force gives rise to an exponential front growth. This new capacity to control multiphase flows sets new experimental challenges that can be determinant for micro and nanofluidic devices.
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