Wang Ruifei, Chai Jin, Luo Bobo, Liu Xiong, Zhang Jianting, Wu Min, Wei Mingdan, Ma Zhuanyue
Shaanxi Key Laboratory of Well Stability and Fluid & Rock Mechanics in Oil and Gas Reservoirs, College of Petroleum Engineering, Xi'an Shiyou University, 710065, China.
Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China.
Beilstein J Nanotechnol. 2021 Nov 17;12:1237-1251. doi: 10.3762/bjnano.12.91. eCollection 2021.
The slip boundary condition for nanoflows is a key component of nanohydrodynamics theory, and can play a significant role in the design 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 different interfacial properties on slip length are analyzed. On strong hydrophilic surfaces, a negative slip length exists and varies with the external 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, can also affect the effective slip length. Finally, potential applications of nanofluidics with a tunable slip length are discussed and future directions related to slip boundary conditions for nanoscale flow systems are addressed.
纳米流体流动的滑移边界条件是纳米流体动力学理论的关键组成部分，并且在纳米流体器件的设计和制造中可以发挥重要作用。在本综述中，聚焦于纳米受限液体流动的滑移边界条件，我们首先总结了一些关于滑移长度的基本概念，包括其定义和类别。然后，分析了不同界面性质对滑移长度的影响。在强亲水表面上，存在负滑移长度且其随外部驱动力而变化。此外，根据是否存在真实滑移长度，表面粗糙度的幅度对有效滑移长度有不同影响。表面纹理的组成，包括各向同性和各向异性纹理，也会影响有效滑移长度。最后，讨论了具有可调滑移长度的纳米流体学的潜在应用，并阐述了与纳米尺度流动系统的滑移边界条件相关的未来方向。
