Two-phase flow and mass transfer in microchannels: A review from local mechanism to global models
Two-phase flow and mass transfer in microchannels: A review from local mechanism to global models
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微通道中的两相流和传质：从局部机制到全局模型的回顾
DOI：
10.1016/j.ces.2020.116017
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发表时间：
2021-01
影响因子：
4.7
通讯作者：
Chen Guangwen
中科院分区：
文献类型：
--
作者：
Yao Chaoqun;Zhao Yuchao;Ma Haiyun;Liu Yanyan;Zhao Qiankun;Chen Guangwen
微反应技术在过程强化和化学合成，特别是在多相应用中具有优势。对流体力学和传质的透彻理解是实施此类应用的先决条件。本文从多尺度的角度，从局部机理到全局行为，综述了微通道内两相体系流动与传质的研究进展。的流动模式，形成的气泡/液滴，和操纵的气泡/液滴的详细介绍和讨论。传质方面包括液滴/段塞的速度分布和内部混合，以及界面传质机理和模拟模型。该综述的目的是直接显示决定传输现象的物理成分，帮助解释观察到的行为，并指导反应器设计。为了简化物理成分，注意力集中在直通道上，而其他通道中的现象（例如，曲流河道）被忽略。
Microreaction technology is preferential in process intensification and chemical synthesis, especially in multiphase applications. A thorough understanding of the hydrodynamics and mass transfer is the pre-requisite for implementing such applications. This review discusses the recent progress on the flow and mass transfer of two-phase systems in microchannels, in a multi-scale view from local mechanism to global behavior. The flow patterns, the formation of bubbles/droplets, and the manipulation of bubbles/droplets are presented and discussed in detail. The mass transfer aspects include the velocity profile and mixing inside droplets/slugs, as well as the interfacial mass transfer mechanism and simulative models. The aim of the review is to show directly the physical ingredients which determine the transport phenomena, help explain the observed behavior, and guide reactor design. To simplify the physical ingredients, the attention is focused on straight channels while phenomena in other channels (e.g., meandering channel) are neglected.
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