论文标题
润滑剂注入的表面流动崩溃
Flow-driven collapse of lubricant-infused surfaces
论文作者
论文摘要
外部液体流中注入的润滑剂表面通常会减少粘性阻力。但是，由于半月板变形，注入的状态可能会崩溃。在这里，我们讨论了毛细血管数，液体/润滑剂粘度比和凹槽的纵横比，作为诱导这种过渡的参数，将注入和倒塌的横向浅凹槽状态之间的过渡。发现根据凹槽的深度，发生了两种不同的情况。由于前凹槽边缘从弯月面上占据，可能会发生注入润滑剂的表面。但是，对于非常浅的质地，弯月面在发生这种情况之前接触底墙。我们的解释可以帮助避免在各种应用中这种普遍有害的效果。
Lubricant-infused surfaces in an outer liquid flow generally reduce viscous drag. However, owing to the meniscus deformation, the infused state could collapse. Here we discuss the transition between infused and collapsed states of transverse shallow grooves, considering the capillary number, liquid/lubricant viscosity ratio and aspect ratio of the groove as parameters for inducing this transition. It is found that depending on the depth of the grooves, two different scenarios occur. A collapse of lubricant-infused surfaces could happen due to a depinning of the meniscus from the front groove edge. However, for very shallow textures, the meniscus contacts the bottom wall before such a depinning could occur. Our interpretation could help avoiding this generally detrimental effect in various applications.
