微通道内液-液两相流流型及传质的研究进展

微通道内液-液两相流流动在微化工系统中占有重要的地位，了解微通道内液-液两相流体流动和传质规律对推动其工业化应用有重要作用。本文以微通道内液-液两相流系统为研究对象，简述了不同工况下微通道内液-液两相流流型和混合传质效率，分析了微通道特征、流体性质和流体流动速度等对流型形成和传质效率的影响。指出目前对于微通道内液-液两相流的研究多处于定性研究，定量研究仅针对某一体系展开，所得结果具有一定的局限性。关于微通道内液-液两相流传质研究实验较多而数值模拟方法相对较少，接下来的研究工作中应该考虑建立微通道内液-液两相流基础研究的数据库，通过分析大量的数据获得有效的流型划分准则和相关经验式以此推动微通道内液-液两相流的工业化应用。同时在传质研究过程中应研究开发相应的数值模拟模型，保证实验和数值模拟相结合，提出有效的传质效率评价机制。

Research progress on flow regimes and mass transfer of liquid-liquid two-phase flow in microchannels

Liquid-liquid two-phase flow in microchannels plays an important role in micro-chemical engineering. Understanding the role of liquid-liquid two-phase flow, mixing and mass transfer in microchannels is of great importance for improving its industrial applications. This paper mainly focused on the liquid-liquid two-phase flow in microchannels, summarized the different flow patterns and mass transfer coefficients of the liquid-liquid two-phase flow under different operating conditions. The influence of various factors including features of microchannels, properties and flow rates of fluids on the formation of flow patterns and mass transfer coefficients were analyzed. It was pointed out that most of researches on liquid-liquid two-phase flow in microchannels were qualitative. Quantitative researches were aimed at the specific systems and the results haven a few limitations. Moreover, researches on mass transfer of liquid-liquid two-phase flow in microchannels are conducted experimentally and there are relatively few numerical simulations. Thus, the following studies should be considered to establish the database based on the fundamental researches of liquid-liquid two-phase flow. Based on the analysis of numerous data the criteria of regime classification and empirical formulas should be gained for improving its industrial applications. The numerical simulation models were deserved to develop the effective evaluation mechanisms on mass transfer efficiency in liquid-liquid two-phase flow.