计算流体力学方法模拟规整填料塔内流体流动行为的研究进展

Progress of Simulation of Fluid Flow Behavior in Structured Packed Column by Computational Fluid Dynamics

对采用计算流体力学(CFD)方法模拟规整填料塔内流体流动行为的研究进展进行了综述,分别介绍了单相流模型和两相流模型。单相流模型可预测气相或液相在规整填料塔内轴向、径向的扩散行为及气相的压头损失等;两相流模型主要研究规整填料塔内气液相流动行为,利用该模型可计算液体在规整填料表面的流动过程及气液相间的传质行为,其模拟结果比单相流模拟更接近实际。随流体力学学科和计算机技术及现代测量技术的进一步发展,将会促进CFD技术在化工过程中的应用。

Application of computational fluid dynamics （CFD） to simulate fluid flow behavior in structured packed column was reviewed. CFD models include single -phase flow model and two -phase flow model. Using single - phase flow models, axial and radial diffusions of gas - or liquid - phase and formation of dry pressure drop in gas phase can be simulated. The two - phase flow models can be used to describe fluid flow behavior and mass transfer process of gas - liquid two phase flow. The simulation results of the latter are much closer to actual process occurring in structured packed column than those of single -phase flow model. With further developments of fluid dynamics, computer technology and modem measurement techniques, CFD simulation will be more widely used in chemical process.