中国物理B ›› 2008, Vol. 17 ›› Issue (12): 4541-4546.doi: 10.1088/1674-1056/17/12/035

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Electrohydromechanical analysis based on conductivity gradient in microchannel

AntonioRamos1, 姜洪源2, 任玉坤2, 敖宏瑞2   

  1. (1)Department Electronica y Electromagnetismo, Universidad de Sevilla, Avda Reina Mercedes s/n, Sevilla 41012, Spain; (2)School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2008-03-03 修回日期:2008-04-04 出版日期:2008-12-20 发布日期:2008-12-20
  • 基金资助:
    Project supported by the 111 Project (Grant No B07018).

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   

  1. a School 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
  • Received:2008-03-03 Revised:2008-04-04 Online:2008-12-20 Published:2008-12-20
  • Supported by:
    Project supported by the 111 Project (Grant No B07018).

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摘要： 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.

关键词: electrohydrodynamics, conductivity gradient, theoretical analysis, numerical simulation

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.

Key words: electrohydrodynamics, conductivity gradient, theoretical analysis, numerical simulation

中图分类号:  (Magnetohydrodynamics and electrohydrodynamics)

  • 47.65.-d
47.10.ad (Navier-Stokes equations) 47.85.Np (Fluidics) 82.45.Fk (Electrodes) 82.45.Gj (Electrolytes) 85.85.+j (Micro- and nano-electromechanical systems (MEMS/NEMS) and devices)