萃取柱内液-液两相流CFD-PBM模拟研究进展

对萃取柱内CFD-PBM模拟研究进行了较详细的综述，包括其基本理论、不同的求解方法及模拟研究现状等. CFD-PBM模拟的基本方程包括流动方程和群体平衡方程，其相互耦合，群体平衡方程涉及破碎与聚并2个关键模型. 群体平衡模型的求解方法包括直接离散化方法、矩量法、正交矩量法、直接正交矩量法、分段正交矩量法等，对这些方法的原理、优点和缺点进行了综述. 目前国际上关于萃取柱内CFD模拟采用较多的是简单的欧拉-欧拉两相流模拟，考虑液滴尺寸分布和进一步的浓度分布的群体平衡模型应用较少. 完善伴随传质的液-液分散体系的群体平衡模型，并将其应用于不同类型的萃取柱中，是萃取分离学科的重要任务.

Advances in Simulation of Liquid-Liquid Two-phase Flow in Extraction Columns with CFD-PBM

A detailed review on the CFD-PBM research in the extraction columns is presented,including the fundamental theory,different solution methods,and status of the simulation research.The basic equations in the CFD-PBM simulation contain the flow equations and the population balance equation,which are coupled with each other.Coalescence and break-up models are two important models in the population equation.The methods to solve the population balance equation include the class method,the method of moments,the quadrature method of moments,the direct quadrature method of moments,and the sectional quadrature method of moments.The fundamental,advantages and disadvantaged of these methods were reviewed.The Eulerian-Eulerian method is mainly used in the CFD simulation of the two-phase flow in extraction columns to date.The PBM which considers the droplet size distribution and further the concentration distribution is relatively less used in extraction columns.To improve the PBM in a liquid-liquid dispersion system with mass transfer and to use the model in different types of extraction columns are important issues for extraction research.