Electro-osmosis-driven micro-channel flows: A comparative study of microscopic particle image velocimetry measurements and numerical simulations

Electro-osmosis-driven micro-channel flows: A comparative study of microscopic particle image... This paper presents global and point-wise comparisons of experimental measurements and numerical simulation results of electro-osmotically driven flows in two elementary micro-channel configurations, a straight channel with a groove and a T-junction channel. The micro-channels are made by photolithography using poly-dimethylsiloxane (PDMS), a type of silicon product, which is transparent, and electro-osmotically permeable to a variety of liquids. A microscopic particle image velocimetry system has been developed to measure full field velocity distributions by tracking the fluorescence images of 500-nm diameter fluorescene dye particles. The numerical algorithm is based on a spectral element formulation of incompressible Navier–Stokes equations with electro-osmotic forcing. The algorithm utilizes modal expansions in mixed quadrilateral and triangular meshes, enabling complex geometry discretizations with spectral accuracy. Comparisons of experimental and numerical results show good agreements, validating both numerical and experimental methodologies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Electro-osmosis-driven micro-channel flows: A comparative study of microscopic particle image velocimetry measurements and numerical simulations

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Publisher
Springer-Verlag
Copyright
Copyright © 2002 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-002-0449-0
Publisher site
See Article on Publisher Site

Abstract

This paper presents global and point-wise comparisons of experimental measurements and numerical simulation results of electro-osmotically driven flows in two elementary micro-channel configurations, a straight channel with a groove and a T-junction channel. The micro-channels are made by photolithography using poly-dimethylsiloxane (PDMS), a type of silicon product, which is transparent, and electro-osmotically permeable to a variety of liquids. A microscopic particle image velocimetry system has been developed to measure full field velocity distributions by tracking the fluorescence images of 500-nm diameter fluorescene dye particles. The numerical algorithm is based on a spectral element formulation of incompressible Navier–Stokes equations with electro-osmotic forcing. The algorithm utilizes modal expansions in mixed quadrilateral and triangular meshes, enabling complex geometry discretizations with spectral accuracy. Comparisons of experimental and numerical results show good agreements, validating both numerical and experimental methodologies.

Journal

Experiments in FluidsSpringer Journals

Published: Jul 8, 2002

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