Slip-length measurement of confined air flow using dynamic atomic force microscopy
Language
en
Article de revue
This item was published in
Physical Review E : Statistical, Nonlinear, and Soft Matter Physics. 2008-08-26, vol. 78, n° 2, p. 027302 (1-4)
American Physical Society
English Abstract
We present an experimental measurement of the slip length of air flow close to solid surfaces using an atomic force microscope (AFM) in dynamic mode. The air was confined between a glass surface and a spherical glass ...Read more >
We present an experimental measurement of the slip length of air flow close to solid surfaces using an atomic force microscope (AFM) in dynamic mode. The air was confined between a glass surface and a spherical glass particle glued to an AFM cantilever. The Knudsen number was varied continuously over three decades by varying the distance between the two surfaces. Our results show that the effect of confining the air is purely dissipative. The data are described by an isothermal Maxwell slip-boundary condition, and the measured slip-length value was 118 nm.Read less <
English Keywords
47.10.ad
Navier-Stokes equations
47.45.Gx
Slip flows and accommodation
83.50.Lh
Slip boundary effects (interfacial and free surface flows) (see also 47.45.Gx Slip flows and accommodation in fluid dynamics)
83.50.Rp
Wall slip and apparent slip
Origin
Hal imported