Title :
Electrokinetically-driven micro mixer with a novel surface-charge pattern
Author :
Hau, Winky Lap Wing ; Leung, Pak Kin ; Lee, Yi-Kuen ; Lee, Lap Man ; Zohar, Yitshak
Author_Institution :
Dept. of Mech. Eng., Hong Kong Univ. of Sci. & Technol., Kowloon
Abstract :
An electrokinetically-driven micro mixer with a special surface-charge pattern was designed, fabricated and characterized using fluorescence video microscopy. Zeta potential of the working fluids was measured to facilitate the numerical simulation and optimization of the proposed mixer. The mixing flow of the electrolyte with and without microparticle was digitally recorded and analyzed in terms of concentration profile and mixing index. The experimental mixing enhancement is consistent with the simulation result
Keywords :
electrohydrodynamics; electrokinetic effects; flow; microfluidics; surface charging; concentration profile; electrokinetically-driven micro mixer; electrolyte mixing flow; fluorescence video microscopy; mixing index; surface-charge pattern; zeta potential; Chemical technology; Fluid flow; Glass; Liquids; Mechanical engineering; Microchannel; Numerical simulation; Silicon compounds; Substrates; Surface treatment;
Conference_Titel :
Robotics and Biomimetics (ROBIO). 2005 IEEE International Conference on
Conference_Location :
Shatin
Print_ISBN :
0-7803-9315-5
DOI :
10.1109/ROBIO.2005.246369
