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High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
Near-field laser Doppler velocimetry measures near-wall velocities
B Loppinet1, J K G Dhont, P Lang
1Foundation for Research and Technology Hellas, Heraklion, Greece. benoit@iesl.forth.gr
The European Physical Journal. E, Soft Matter
|July 24, 2012
Abstract:
A new near-wall velocimetry technique is proposed, based on evanescent wave dynamic light scattering, which allows for the measurement of near-wall velocity profile (characterized by an apparent slip velocity and a shear rate) with a resolution of tens of nanometers. A full theoretical expression of the correlation function is derived for the case of linear flow with negligible Brownian motion. The technique is demonstrated for latex spheres dispersed in water-glycerol mixtures.

