Convergent-divergent micromixer coupled with pulsatile flow
Convergent-divergent micromixer coupled with pulsatile flow
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DOI：
10.1016/j.snb.2015.01.062
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发表时间：
2015-05-01
影响因子：
8.4
通讯作者：
Kim, Kwang-Yong
中科院分区：
文献类型：
--
作者：
Afzal, Arshad;Kim, Kwang-Yong
本文提出了一种利用空间和时间上的周期性正弦特性的微流控平台的高效混合系统。在所测试的五种几何形状中，具有正弦壁的收敛-发散通道(空间周期)代表了与脉动(时间周期)流的最有效耦合。利用非定常的N-S方程，研究了正弦脉冲对收敛-发散微通道混合性能的影响。用雷诺数、斯特劳哈尔数、脉动幅度与定常流速之比分析了混合性能。在瞬时混合模式和总体混合性能方面，微混合器在这些参数下显示出有趣的混合行为。脉冲输入的微混合器在正弦壁的两个周期内达到了0.92的混合指数。(C)2015爱思唯尔B.V.保留所有权利。
An efficient mixing system for a microfluidic platform that uses periodic sinusoidal characteristics in space and time is proposed in this work. A convergent-divergent channel with sinusoidal walls (space-periodic) represented the most effective coupling with pulsatile (time-periodic) flow among the five tested geometries. The effects of sinusoidal pulsing on mixing performance in the convergent-divergent microchannel were examined using unsteady Navier-Stokes equations. The mixing performance was analyzed using the Reynolds and Strouhal numbers, and the ratio of pulsing amplitude to steady flow velocity. The micromixer shows interesting mixing behaviors with these parameters in terms of instantaneous mixing patterns as well as overall mixing performance. The micromixer with pulsing inputs achieved mixing index, 0.92 within two periods of the sinusoidal walls. (C) 2015 Elsevier B.V. All rights reserved.