Abstract
For transport-limited surface reaction, fluid flow transporting particles in a solution toward a reaction region is effective to enhance the reaction efficiency and rate. AC electrothermal (ET) flow, induced by property gradient due to temperature difference under electric field, is suited for the surface reaction enhancement. In this study, 3D flow field measurement was carried out to obtain ACET flow structure by micron-resolution particle image velocimetry (micro-PIV). A microfluidic device with an electrode having an inclined gap with 60 degrees respect to the streamwise direction was implemented. 3D velocity field is composed based on orthogonal 2D velocity fields by the observations of particle movement from side- and bottom-view. As a result, 3D flow of ACET was successfully measured. The results indicate that more effective flow concentrating particles would be available.
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