Rate-Dependent Slip of Newtonian Liquid at Smooth Surfaces

作者：Yingxi Zhu, Steve Granick · 发表于：Physical Review Letters · 年份：2001 · DOI：10.1103/physrevlett.87.096105 · 被引用次数：664 · 研究领域：Microfluidic and Capillary Electrophoresis Applications、Electrostatics and Colloid Interactions、Surface Modification and Superhydrophobicity

Newtonian fluids were placed between molecularly smooth surfaces whose spacing was vibrated at spacings where the fluid responded as a continuum. Hydrodynamic forces agreed with predictions from the no-slip boundary condition only provided that flow rate (peak velocity normalized by spacing) was low, but implied partial slip when it exceeded a critical level, different in different systems, correlated with contact angle (surface wettability). With increasing flow rate and partially wetted surfaces, hydrodynamic forces became up to 2-4 orders of magnitude less than expected by assuming the no-slip boundary condition that is commonly stated in textbooks.