A review on slip boundary conditions at the nanoscale: recent development and applications

[摘要] The slip boundary condition for nanoflows is a key component of nanohydrodynamics theory, and can play a significant role in thedesign and fabrication of nanofluidic devices. In this review, focused on the slip boundary conditions for nanoconfined liquid flows,we firstly summarize some basic concepts about slip length including its definition and categories. Then, the effects of differentinterfacial properties on slip length are analyzed. On strong hydrophilic surfaces, a negative slip length exists and varies with theexternal driving force. In addition, depending on whether there is a true slip length, the amplitude of surface roughness has different influences on the effective slip length. The composition of surface textures, including isotropic and anisotropic textures, canalso affect the effective slip length. Finally, potential applications of nanofluidics with a tunable slip length are discussed and futuredirections related to slip boundary conditions for nanoscale flow systems are addressed.

[学科分类] 环境监测和分析

[关键词] boundary condition;interfacial properties;nanofluidics;slip length;unconventional reservoirs