期刊
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
卷 18, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0960-1317/18/6/065017
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Five passive micro-mixers were designed, fabricated and tested, and were compared to that of the conventional T-shaped channel in order to examine the mixing performance by increasing the lateral convection/or related mixing mechanisms. Electro-osmotic pumping was used to generate fluid velocities in the creeping flow regime (Re << 1) in order to achieve the mixing enhancement by chaotic advection. Iodine dye (qualitative) and rhodamine B (quantitative) mixing experiments were visualized and measured through conventional microscopes and with mu LIF techniques. mu PIV measurements were used for 2D velocity vectors and stretching calculations. Steady-state results show that the alternating wavy-regime (chaotic mixers) micro-channels and inline aligned elements (which alter the flow direction laterally) in micro-channels can induce stirring and improve the mixing significantly even at extremely low Reynolds numbers.
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