Browse > Article
http://dx.doi.org/10.5407/JKSV.2010.8.4.013

Mixing in a Microchannel by using Induced-charge Electro-osmosis  

Jeon, Young-Hun (동아대학교 기계공학과 대학원)
Heo, Young-Gun (동아대학교 기계공학과 대학원)
Jung, Won-Hyuk (동아대학교 기계공학과 대학원)
Alapati, Suresh (동아대학교 기계공학과 대학원)
Suh, Yong-Kweon (동아대학교 기계공학과)
Publication Information
Journal of the Korean Society of Visualization / v.8, no.4, 2010 , pp. 13-18 More about this Journal
Abstract
This paper presents an experimental study on the performance of a micro-mixer using AC electro-osmotic flow. The microchannel is made of PDMS for the side and top walls and glass patterned with ITO for the bottom wall. We first investigated the effect of the applied potential as well as the frequency on the slip velocity. We have found that the slip velocity is roughly proportional to the applied voltage in line with the Helmholtz-Smoluchowski equation and there is an optimum frequency at which the slip velocity becomes maximized. To find the optimum parameters for mixing device we tested our device for various design parameters. It turned out that the best mixing effect is obtained approximately when the electrode angle is $30^{\circ}$, electrode width $200\;{\mu}m$, and the frequency of power supply 700 Hz.
Keywords
AC Electro-osmosis flow; Flow visualization; Mixing index; Optimum design;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Tabeling, P., 2005, Introduction to Microfluidics. Oxford University Press.
2 Lyklema, J., 1995, Fundamentals of Interface and Colloidal Science-Vol. II. Academic Press.
3 Hunter, R.J., 2001, Foundations of Colloidal Science. Oxford University Press.
4 Plecis, A. and Chen, Y., 2007, “Fabrication of microfluidic devices based on glass-PDMS-glass technology,” Microelectronic Engineering, Vol. 84, pp. 1265-1269.   DOI   ScienceOn
5 Suh, Y.K. and Kang S., 2008, “Asymptotic analysis of ion transport in a nonlinear regime around polarized electrodes under ac,” Phys. Rev. E, Vol. 77(3), 031504.   DOI
6 Suh, Y.K., 2008, “AC-Electro-osmotic flows fundmental mechanism and kinematic aspects,” The Korean Society of Visualization, Vol. 6(1), pp. 3-16.   DOI
7 Suh, Y.K. and Kang, S., 2010, “A review on mixing in microfluidics,” Micromachines, Vol. 1(3), pp. 82-111.   DOI
8 Cha, J., Kim, J., Ryu, S.-K., Park, J., Jeong, Y., Park, S., Park, S., Kim, H.C. and Chun, K., 2006, “A highly efficient 3D micromixer using soft PDMS bonding,” J. Micromech. Microeng., Vol. 16, pp. 1778-1782   DOI   ScienceOn
9 Le, T.N., Suh, Y.K. and Kang, S., 2010, “A numerical study on the flow and mixing in a microchannel using magnetic particles,” J. Mech. Sci. Technol., Vol. 24, pp. 441-450.   DOI   ScienceOn
10 Suh, Y.K., Heo, S.G., Heo, Y.G., Heo, H.S. and Kang, S., 2007, “Numerical and experimental study on achannel mixer with a periodic array of cross baffles,” J. Mech. Sci. Technol., Vol. 21, pp. 549-555   DOI   ScienceOn