Electrohydromechanical analysis based on conductivity gradient in microchannel
Jiang Hong-Yuan(姜洪源)a, Ren Yu-Kun(任玉坤)a, Ao Hong-Rui (敖宏瑞)a, Antonio Ramosb
aSchool of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China; b Department Electronica y Electromagnetismo, Universidad de Sevilla, Avda Reina Mercedes s/n, Sevilla 41012, Spain
Abstract Fluid manipulation is very important in lab-on-a-chip system. This paper analyzes phenomena which use the alternating current (AC) electric field to deflect and manipulate coflowing streams of two different electrolytes (with conductivity gradient) within a microfluidic channel. The basic theory of the electrohydrodynamics and simulation of the analytical model are used to explain the phenomena. The velocity induced for different voltages and conductivity gradient are computed. The results show that when the AC electrical signal is applied on the electrodes, the fluid with higher conductivity occupies a larger region of the channel and the interface of the two fluids is deflexed. It will provide some basic references for the people who want to do more study in the control of diffrent fluids with conductivity gradient in microfluidic channel.
Received: 03 March 2008
Revised: 04 April 2008
Accepted manuscript online:
(Micro- and nano-electromechanical systems (MEMS/NEMS) and devices)
Fund: Project supported by the 111
Project (Grant No B07018).
Cite this article:
Jiang Hong-Yuan(姜洪源), Ren Yu-Kun(任玉坤), Ao Hong-Rui (敖宏瑞), Antonio Ramos Electrohydromechanical analysis based on conductivity gradient in microchannel 2008 Chin. Phys. B 17 4541
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