Prospective on Deploying Computational Fluid Dynamics (CFD) and Discrete Element Modelling (DEM) for Solid-Liquid Mixing

摘要

The use of computer aided engineering (CAE) tools for mixing analysis became mainstream with the advances in computational fluid dynamics (CFD) in the mid-1990's. CFD packages such as CFX, STAR-CD and FLUENT all introduced software capable of modelling a key mixing unit operation in the process industries - the stirred tank reactor. Progress over the last decade has led the validated use of CFD in modelling mixing in stirred tank reactors. CFD analysis is routinely used for determining 3D velocity fields, impeller power numbers and blendtime. The richness of this 3D analysis now gives engineers to generate probably statistics for turbulent energy dissipation rate and strain rate which are very useful complements to current scale-up methods in industrial fluid mixing practice.