Abstract: The research progress of liquid-liquid two-phase flow in microchannels in recent years was reviewed from flow patterns，mass transfer and application. The observation and design of flow regimes and the examination of the effects of various factors on the flow patterns are two major parts in the study of liquid-liquid two-phase flow pattern. However，the universal flow regime and flow pattern transition lines have not been proposed. The methods of the liquid-liquid two-phase mass transfer research consist of experimental study and numerical simulation. Both methods mainly focus on the research of droplet flow，slug flow and parallel flow. And compared with the qualitative research, the quantitative research of mass transfer is relatively scarce. The application of liquid-liquid two-phase flow is mainly used in the extraction，material synthesis，biological crystallization，etc. Furthermore，the further research of liquid-liquid two-phase ?ow patterns，mass transfer and application were prospected. And in order to promote the industrialization process of liquid-liquid two phase flow, we need undertake in-depth research into two aspects. One is the combination of experimental study and numerical simulation, the other is the extension of its application research.

Key words: microchannels, liquid-liquid two-phase flow, flow patterns, mass transfer, microchannels, liquid-liquid two-phase flow, flow patterns, mass transfer

摘要： 从流型、传质和应用3个方面，介绍了近年来微通道内液-液两相流的研究进展。液-液两相流型研究内容主要有两部分，即流型的观察、流型谱图的绘制以及考察多种因素对流型的影响，但是具有普适性的流型谱图和流型转变线仍未提出。液-液两相传质研究方法包括实验研究和数值模拟两种，主要研究在液滴流、弹状流和平行流3种稳定流型下的传质过程；且相对于定性研究，定量的传质研究较少。对于微通道内液-液两相流应用研究，主要体现在萃取、材料合成、生物结晶等方面。此外，对今后微通道内液-液两相的流型、传质和应用研究进行了展望，指出需从实验与模拟计算相结合以及拓展微通道内液-液两相流的应用研究两个方面进行深入研究，推进其工业化进程。

关键词: 微通道, 液-液两相流, 流型, 传质, 微通道, 液-液两相流, 流型, 传质