The hydrodynamics of liquid–liquid slug flow with various fluid systems were investigated, aiming at revealing the viscous effects of both phases. The operation range, droplet formation, film thickness and pressure drop of slug flow were studied and discussed. The results reveal the importance of inertia and viscous forces of both phases in the transition of flow patterns. Accordingly, a universal flow map based on composite terms of Ca_cRe_c^0.5 and Ca_dRe_d^0.5 was adopted, which worked well for a wide viscosity range. For droplet formation in the present system, both the squeezing and shearing regimes deviated from the classical ideal models. Under higher capillary number, the film was accumulated at the corners and lateral planes, leading to distinct droplet shapes from literature. For the two-phase pressure drop, new empirical correlations were proposed to describe the recirculation inside both the droplets and slugs. The findings can provide better guidance for optimized reactor design.

研究了在各种流体系统中液-液团块流的流体动力学，目的是揭示两相的粘滞效应。研究和讨论了团状流的工作范围，液滴形成，膜厚和压降。结果揭示了在流型转变中两相的惯性和粘性力的重要性。因此，基于Ca _c Re _c ^0.5和Ca _d Re _d ^0.5的复合项的通用流图采用了这种材料，在很宽的粘度范围内都能很好地工作。对于本系统中的液滴形成，挤压和剪切方式均偏离经典理想模型。在较高的毛细管数下，薄膜积聚在角和侧面，从而形成了与文献不同的液滴形状。对于两相压降，提出了新的经验相关性来描述液滴和团块内部的再循环。这些发现可以为优化反应堆设计提供更好的指导。