Rotation effect in split and recombination micromixing
Rotation effect in split and recombination micromixing
复制标题
DOI：
10.1016/j.snb.2007.08.038
复制
发表时间：
2008-01-29
影响因子：
8.4
通讯作者：
Lee, Seung S.
中科院分区：
文献类型：
--
作者：
Lee, Seok Woo;Lee, Seung S.
本文研究了旋转效应的分裂和重组（SAR）混合，其中一个具体的情况下，混沌平流应用于层压，在微通道。设计了三种类型的SAR微混合器：No-R，Co-R和Count-R。它们由其旋转效果和旋转方向定义。在实验中，在1 μ l/min（Re 0.12）和100 μ l/min（Re 12）之间的各种流速下比较旋转效应的混合效率，并在100 μ l/min（Re 12）和1000 μ l/min（Re 120）之间进行数值分析。它的结论是，有三个区域，SAR占主导地位，混合，旋转占主导地位的地区，以下混合制度的雷诺数旋转时，适用于SAR。在混合区，SAR是扭曲的旋转和效率迅速下降，随着雷诺数的增加。为了提高微通道内大范围雷诺数下的混合效率，必须通过优化旋转强度来减小第二区域（混合区域）。(C)2007 Elsevier B. V.保留所有权利。
This paper investigates the effect of rotation in split and recombination (SAR) mixing, one of the specific cases in which chaotic advection is applied to lamination, in a microchannel. Three types of SAR micromixers were designed: No-R, Co-R, and Count-R. They are defined by their rotation effect and by the direction of the rotation. The mixing efficiency for the rotation effect was compared at various flow rates between 1 mu l/min (Re 0.12) and 100 mu l/min (Re 12) in an experiment and between 100 mu l/min (Re 12) and 1000 mu l/min (Re 120) for numerical analysis. It is concluded that there are three regions, SAR dominant, mixed, and rotation dominant regions, following mixed regimes for the Reynolds number when rotation is applied to SAR. In the mixed region, the SAR is distorted by rotation and the efficiency rapidly decreases as the Reynolds number increases. In order to increase the mixing efficiency for a wide range of Reynolds numbers in a microchannel, the second region (mixed region) must be diminished by optimizing the intensity of the rotation. (C) 2007 Elsevier B.V. All rights reserved.