Analysis of Passive Mixing in a Serpentine Microchannel with Sinusoidal Side Walls.
Analysis of Passive Mixing in a Serpentine Microchannel with Sinusoidal Side Walls.
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DOI：
10.3390/mi9010008
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发表时间：
2017-12-28
期刊：
影响因子：
3.4
通讯作者：
Park CW
中科院分区：
文献类型：
--
作者：
Javaid MU;Cheema TA;Park CW
由于层流，样品混合在微流体装置中是困难的。微混合器的设计旨在确保最佳使用小型化设备。本研究旨在设计一种基于混沌平流的被动式微混合器，以提高混合效率。设计了一种具有正弦形侧壁的蛇形微通道，并研究了振幅波长比（A/λ）分别为0.1，0.15和0.2的三种情况。采用Navier-Stokes方程进行了数值模拟，以确定流场。然后将流动与对流扩散方程耦合，以获得组分浓度分布。在雷诺数为0.1 ~ 50的范围内，将正弦壁通道的混合性能与简单蛇形通道的混合性能进行了比较。在高雷诺数下观察到二次流，其混合流体流。这些流动在拟议的正弦壁通道中占主导地位，从而以相似或更少的混合成本显示出比简单蛇形通道更好的混合性能。增大A/λ比可获得更高的混合效率。
Sample mixing is difficult in microfluidic devices because of laminar flow. Micromixers are designed to ensure the optimal use of miniaturized devices. The present study aims to design a chaotic-advection-based passive micromixer with enhanced mixing efficiency. A serpentine-shaped microchannel with sinusoidal side walls was designed, and three cases, with amplitude to wavelength (A/λ) ratios of 0.1, 0.15, and 0.2 were investigated. Numerical simulations were conducted using the Navier–Stokes equations, to determine the flow field. The flow was then coupled with the convection–diffusion equation to obtain the species concentration distribution. The mixing performance of sinusoidal walled channels was compared with that of a simple serpentine channel for Reynolds numbers ranging from 0.1 to 50. Secondary flows were observed at high Reynolds numbers that mixed the fluid streams. These flows were dominant in the proposed sinusoidal walled channels, thereby showing better mixing performance than the simple serpentine channel at similar or less mixing cost. Higher mixing efficiency was obtained by increasing the A/λ ratio.
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影响因子：
6.1
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