Hysteresis in multiphase microfluidics at a T-junction.
Hysteresis in multiphase microfluidics at a T-junction.
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DOI：
10.1021/la1004243
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
M. Zagnoni;Jamie E Anderson;J. Cooper
中科院分区：
文献类型：
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作者：
M. Zagnoni;Jamie E Anderson;J. Cooper
多相微流体在流体动力学、生物学、颗粒合成等领域提供了广泛的功能，最近还在逻辑计算方面提供了广泛的功能。在这篇文章中，我们描述了在T形结的亲水性微流控系统中，不相容的多相流的滞后现象。稳定和不稳定状态的行为，以油和水的分段和平行流型的形式被可靠地产生，取决于应用于相的流速的历史。通过实验和数值模拟分析了两种状态之间的转变机理，描述了物理和流体动力学参数对流动滞回行为的影响。这些多相系统的特点使它们适合用作压力比较器，也适合于实现微流控逻辑运算。
Multiphase microfluidics offer a wide range of functionalities in the fields of fluid dynamics, biology, particle synthesis, and, more recently, also in logical computation. In this article, we describe the hysteresis of immiscible, multiphase flow obtained in hydrophilic, microfluidic systems at a T-junction. Stable and unstable state behaviors, in the form of segmented and parallel flow patterns of oil and water, were reliably produced, depending upon the history of the flow rates applied to the phases. The transition mechanisms between the two states were analyzed both experimentally and using numerical simulations, describing how the physical and fluid dynamic parameters influenced the hysteretic behavior of the flow. The characteristics of these multiphase systems render them suitable to be used as pressure comparators and also for the implementation of microfluidic logic operations.