Single-phase fluid flow and mixing in microchannels
Single-phase fluid flow and mixing in microchannels
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DOI：
10.1016/j.ces.2010.08.016
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发表时间：
2011-04-01
影响因子：
4.7
通讯作者：
Nigam, K. D. P.
中科院分区：
文献类型：
--
作者：
Kumar, Vimal;Paraschivoiu, Marius;Nigam, K. D. P.
在过去的十年中，由于微型装置的高表面积与体积比和紧凑性，微流体应用呈指数级增长，这使得它们成为传统系统有吸引力的替代品。微流体的持续增长趋势凸显了了解微尺度流体流动和混合的机制和基本差异的重要性。在本文中，总结了微尺度单相流体流动领域的实验研究工作以及与微尺度流动研究相关的问题。实验数据根据摩擦系数、层流到湍流的转变以及粗糙度对不同横截面几何形状的流体动力学的影响进行分析。讨论了由于可压缩性和稀有部分、相对粗糙度、性能变化和粘性耗散效应而导致的通过微通道的传输机制的非典型行为的差异。最后，报告了不同微混合器类型和设计的微混合器的最新开发进展。微混合器已根据其操作范围（特征无量纲数，如雷诺数 Re、佩克莱特数 Pe 和斯特劳哈尔数 St）和混合特性进行了量化。 (C) 2010 爱思唯尔有限公司。版权所有。
In the last decade there has been an exponential increase in microfluidic applications due to high surface-to-volume ratios and compactness of microscale devices, which makes them attractive alternatives to conventional systems. The continuing growing trends of microfluidic highlights the importance to understand the mechanism and fundamental differences involved influid flow and mixing at microscale. In the present article, the experimental research efforts in the area of microscale single- phase fluidflow and issues associated with investigations atmicroscale flow have been summarized. The experimental data are being analyzed interms of friction factor, laminar-to- turbulent transition, and the effect of roughness on fluid hydro dynamics for different cross- sectional geometries. The differences in the uncharacteristic behavior of the transport mechanisms through microchannels due to compressibility and rare faction, relative roughness, property variations and viscous dissipation effects are discussed. Finally, progress on recent development of micromixers has been reported for different micromixer types and designs. The micromixers have been quantified based on their operating ranges (interms of characteristic dimensionless numbers such as Reynolds number Re, Pecletnumber Pe, and Strouhalnumber St) and mixing characteristics. (C) 2010 ElsevierLtd. All rights reserved.