Numerical Study of Microfluidic Mixing with Combined Effects of Periodic Electric and Zeta Potential Variation

• Main Authors: Jin-Kuan Lee, 李俊寬
• Other Authors: Po-Wen Hwang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/49251710675702088292

碩士 === 逢甲大學 === 航空工程所 === 93 === In this study, the combined effects of zeta potential and periodic electric variation on microfluidic mixing in Y-type microchannels have been investigated by using commercial computational fluid dynamics software (CFD-ACE+). The parameter study including non-uniform surface charge distribution and various inlet angles under an externally applied, steady electric field have been proceeded. The results after applied an externally unsteady electric field are also presented. We find that the electrokinetic generated microvortices play important role in enhancement of microfluidic mixing especially the counter-rotating pattern. The inlet angles have very little effect on microfluidic mixing in microchannels. The unsteady applied electric field enhance the mixing efficiency of co-rotating microvortex patterns, but degrade the mixing efficiency of counter-rotating microvortex patterns.