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Title: Vortex generation and control in a microfluidic chamber with actuations
Authors: Shang, Xiaopeng
Huang, Xiaoyang
Yang, Chun
Keywords: DRNTU::Engineering::Mechanical engineering
Flow Control
Acoustic Waves
Issue Date: 2016
Source: Shang, X., Huang, X., & Yang, C. (2016). Vortex generation and control in a microfluidic chamber with actuations. Physics of Fluids, 28(12), 122001-. doi:10.1063/1.4971314
Series/Report no.: Physics of Fluids
Abstract: In this paper, we present a novel method for vortex generation and control in a resonator-shaped microfluidic chamber with actuations. By varying the actuation conditions, including the working transducers, frequency, and voltage, two regimes of vortices, clockwise vortex (CW vortex) and counter-clockwise vortex (CCW vortex), are generated in the chamber. We show that the direction of the vortex can be conveniently shifted from clockwise to counterclockwise by switching the working transducers without interrupting the flow, and the intensity of the vortex can be regulated by the actuation frequency and voltage. It is proposed that the vortex generation in the present case is due to the instability of the actuation-induced pulsatile flow through the sudden expansion part at the outlet of the chamber, while the vortex control is realized through the asymmetric flows in the chamber induced by the upper or lower transducers. The reported method of vortex generation and control can be applied in microfluidic operations for mixing enhancement of multiple reagents and distribution of microparticles and nanoparticles.
ISSN: 1070-6631
DOI: 10.1063/1.4971314
Rights: © 2016 The Author(s) (Published by AIP). This paper was published in Physics of Fluids and is made available as an electronic reprint (preprint) with permission of The Author(s) (Published by AIP). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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