Industrial University Cooperation Project: Analysis of Turbulent Liquid Dispersions with Mass Transfer

本研究项目将开发和验证湍流搅拌液-液分散体中的两相流动模型。这些结果将对放大这些系统中发生的相间传输过程具有直接的实用价值。该模型考虑了由于液滴的合并和破碎而产生的分散相微观混合。连续相的湍流动量平衡方程和能量平衡方程通过摩擦项耦合到分散相。通过同时求解液滴布居平衡方程，可以计算分散体系的局部液滴尺寸分布、分散相微混合以及连续相的摩擦损失。将流体力学模型和分散相模型耦合到守恒方程中来模拟相间运移。在容器中进行了两个数量级以上的物理平衡液-液分散实验，以测量空间相关的液滴尺寸数据，并与模型预测进行比较。为了与湍流输运模型进行比较和验证，进行了平均流速和湍流度的测量。

This research project will develop and verify models for two-phase flow in turbulently agitated liquid-liquid dispersions. The results will have direct utility for scale-up of interphase transport processes occurring in these systems. The proposed model incorporates dispersed phase micromixing due to coalescence and breakage of droplets. The turbulent momentum and energy balance equations for the continuous phase are coupled to the dispersed phase through the friction term. Simultaneous solution of the drop population balance equation permits calculation of the local drop size distribution, dispersed-phase micromixing, and the frictional losses of the continuous phase for a distributed system. The hydrodynamic and dispersed phase models are coupled to the conservation equation to model interphase transport. Experiments are conducted for physically equilibrated liquid-liquid dispersions in vessels over two orders of magnitude to measure spatially dependent drop size data for comparison with model prediction. Measurements of mean flow and turbulence are made for comparisons with and verification of the turbulence transport model.