title: Flow and slip transition in nanochannels.
abstract: We experimentally investigate the Poiseuille flows in nanochannels. It is found that the flow rate undergoes a transition between two linear regimes as the shear rate is varied. The transition indicates that the nonslip boundary condition is valid at low shear rate. When the shear rate is larger than a critical value, slip takes place and the slip length increases linearly with increasing shear rate before approaching a constant value. The results reported in this work can help advance the understanding of flow slip in nanochannels.
authors.affiliation: Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
authors.forename: Long
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
authors.forename: Jingwen
authors.initials: J
authors.lastname: Mo
authors.affiliation: Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Li
mesh_terms: D004867:Equipment Design; D005456:Fluorescent Dyes; D016014:Linear Models; D044085:Microfluidics; D018625:Microscopy, Atomic Force; D009038:Motion; D049329:Nanostructures; D036103:Nanotechnology; D011138:Polytetrafluoroethylene; D011312:Pressure; D012825:Silicon; D013997:Time Factors; D014867:Water
chemical_list: D005456:Fluorescent Dyes; D014867:Water; D011138:Polytetrafluoroethylene; D012825:Silicon