title: Role of surface shape on boundary slip and velocity defect.
abstract: Although many gas-phase microfluidic devices contain curved surfaces, relatively little research has been conducted on the degree of slip over nonplanar surfaces. The present study demonstrates the influence of the surface shape (i.e., convex/concave) on the velocity slip and formation of the Knudsen layer. In addition, the study reveals that there is a simple relationship between the shear stress exerted on the surface and the velocity defect in the Knudsen layer.
authors.affiliation: Centre for Microfluidics and Microsystems Modelling, STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom. ali.dinler@stfc.ac.uk
authors.forename: Ali
authors.initials: A
authors.lastname: Dinler
authors.forename: Robert W
authors.initials: RW
authors.lastname: Barber
authors.forename: David R
authors.initials: DR
authors.lastname: Emerson
authors.forename: Stefan K
authors.initials: SK
authors.lastname: Stefanov
authors.forename: Kamil
authors.initials: K
authors.lastname: Orucoglu
mesh_terms: D003198:Computer Simulation; D017276:Friction; D005740:Gases / Q000737:chemistry*; D044085:Microfluidics / Q000379:methods*; D008962:Models, Theoretical; D009038:Motion; D033081:Shear Strength
chemical_list: D005740:Gases