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A Study on Mixing Efficiency in a Two-Channel Circular Micromixer

Published online by Cambridge University Press:  05 May 2011

M. Chang ,
Y.-H. Hu ,
S.-W. Chau  and
K.-H. Lin
M. Chang*
Affiliation:
R&D Center for Membrane Technology and Department of Mechanical Engineering, Chung Yuan Christian University, Chung Li, Taiwan 320, R.O.C.
Y.-H. Hu*
Affiliation:
Department of Mechanical Engineering, Nanya Institute of Technology, Chung Li, Taiwan 320, R.O.C.
S.-W. Chau*
Affiliation:
Department of Mechanical Engineering, Chung Yuan Christian University, Chung Li, Taiwan 320, R.O.C.
K.-H. Lin*
Affiliation:
Department of Mechanical Engineering, Ching Yun University, Chung Li, Taiwan 320, R.O.C.
*
*Professor
**Assistant Professor
**Assistant Professor
**Assistant Professor
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Abstract

The mixing behavior of a two-channel micromixer with a circular mixing chamber at four different chamber depths and six different flow rates had been investigated. Experiments were implemented with the mixings of two fluids. An image inspection method using the variance of the image gray level contrast as the measurement parameter to determine the mixing efficiency distribution in these mixers. The steady, three-dimensional and laminar flow fields inside the micromixers were also simulated numerically with a finite volume discretization. Through the numerical integration over the chamber depth, the three-dimensional numerical prediction could be compressed into a two-dimensional result, which could be directly used to compare with the experimental measurements. Experimental results show that the measured mixing efficiency is raised with the increase of chamber depth. The numerical prediction of mixing efficiency agreed qualitatively with those obtained from the experimental measurements, while the ratio of the depth to diameter of the mixing chamber is big enough to eliminate the viscosity effect.

Keywords

MicromixerMixing efficiencyFlow rateImage gray level
Type
Articles
Information
Journal of Mechanics , Volume 22 , Issue 4 , December 2006 , pp. 331 - 338
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2006

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References

1.Nguyen, N. T. and Wu, Z., “Micromixers—A Review,” Journal of Micromechanics andMicroengineering, 15, pp. Rl–16 (2005).Google Scholar
2.Leu, T. S., Chen, H. Y. and Hsiao, F. B., “Design and simulation of continuous dielectrophoretic flow sorters,” Journal of Mechanics, 22, pp. 99–106 (2006).Google Scholar
3.Wu, Z., Nguyen, N. T. and Huang, X., “Nonlinear Diffusive Mixing in Microchannels: Theory and Experiments,” Journal of Micromechanics and Microengineering, 14, pp. 604–611 (2001).CrossRefGoogle Scholar
4.Schwesinger, N., Frank, T. and Wurmus, H., “A Modular Microfluid System with an Integrated Micromixer,” Journal of Micromechanics and Microengineering, 6, pp. 99–102 (1996).CrossRefGoogle Scholar
5.Liu, R. H., Stremler, M. A., Sharp, K. V., Olsen, M. GSantiago, J. G., Adrian, R. J., Aref, H. and Beebe, D. J., “Passive Mixing in a Three-Dimensional Serpentine Microchannel,” Journal of Microelectromechanical System, 9, pp. 190–197 (2000).CrossRefGoogle Scholar
6.Park, S. J., Kim, J. K., Park, J., Chung, S., Chung, C. and Chang, J. K., “Rapid Three-Dimensional Passive Rotation Micromixer Using the Breakup Process,” Journal of Micromechanics and Microengineering, 14, pp. 6–14 (2005).CrossRefGoogle Scholar
7.Leu, T. S. and Ma, F. C., “Novel EHD-pump driven micro mixers,” Journal of Mechanics, 21, pp. 137–144 (2005).Google Scholar
8.Lu, L. H., Ryu, K. S. and Liu, C.“A magnetic microstirrer and array for microfluidic mixing,” Journal of Microelectromechanical System, 11, pp. 462–469 (2002).Google Scholar
9.Yang, Z., Matsumoto, S., Goto, H., Matsumoto, M. and Maeda, R., “Ultrasonic micromixer for microfluidic systems,” Sensors and Actuators A: Physical Sensors, 93, pp. 266–272 (2001).CrossRefGoogle Scholar
10.Hu, Y. H., Chang, M. and Lin, K. H., “A Technique for Inspecting the Mixing Effect of a Micromixer,” Journal of Microlithography, Microfabrication, and Microsystems, 4, 013013 (2005).Google Scholar
11.Hu, Y. H. and Chang, M., “Study in the Design of Micromixer and Inspection of Mixing Efficiency,” Proceedings ofSPIE, 5261, pp. 10–17, (2004).Google Scholar
12.Rousseaux, J.-M., Muhr, H. and Plasari, E., “Mixing and Micromixing Times in the Forced Vortex Region of Unbaffled Mixing Devices,” The Canadian Journal of Chemical Engineering, 79 (2001).CrossRefGoogle Scholar
13.Lin, C. H., Tsai, C. H. and Fu, L. M., “A rapid three-dimensional vortex micromixer utilizing self-rotation effects under low Reynolds number conditions,” Journal of Micromechanics and Microengineering, 15, pp. 935–943 (2005).CrossRefGoogle Scholar
14.Chau, S. W., Numerical investigation of free-stream rudder characteristic using a multiblock finite volume method, IfS Bericht, Universität Hamburg, Nr. 50. (1997).Google Scholar