AC electroosmotic micromixer for chemical processing in a microchannel.
A rapid micromixer of fluids in a microchannel is presented. The mixer uses AC electroosmotic flow, which is induced by applying an AC voltage to a pair of coplanar meandering electrodes configured in parallel to the channel. To demonstrate performance of the mixer, dilution experiments were conducted using a dye solution in a channel of 120 microm width. Rapid mixing was observed for flow velocity up to 12 mm s(-1). The mixing time was 0.18 s, which was 20-fold faster than that of diffusional mixing without an additional mixing mechanism. Compared with the performance of reported micromixers, the present mixer worked with a shorter mixing length, particularly at low Peclet numbers (Pe < 2 x 10(3)).
Sasaki
Naoki
N
Department of Applied Chemistry, School of Engineering, The University of Tokyo, Tokyo, Japan.
Kitamori
Takehiko
T
Kim
Haeng-Boo
HB
D004058:Diffusion; D004566:Electrodes; D019793:Fluorescein / Q000737:chemistry; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods*; D009995:Osmosis; D012235:Rhodamines / Q000737:chemistry
D012235:Rhodamines; C029773:rhodamine B; D019793:Fluorescein