A Short Review of Numerical Modelling for Photocatalytic Degradation in Dye Systems

This paper reviews the recent development of numerical modelling of photocatalytic degradation in dye systems. The focus of this study is mathematical modelling and numerical approach. The numerical models for simulating photocatalytic degradation processes are classified into three main categories: computational fluid dynamics (CFD), finite difference method (FDM) and finite element method (FEM). CFD is the most popular way to analyze the behaviour of photocatalytic systems due to effective experimental results prediction under varying physical and chemical conditions. FDM effectively solves the time-dependent partial differential equation of the diffusion process in photocatalytic materials over time. FEM is highly accurate for optimizing and simulation the diffusion of Fick’s law for two- or three-dimensional photocatalytic models. Fundamentally, the methods and numerical approach are carefully chosen to obtain meaningful results of the photocatalytic degradation rate. This review is intended to reference theoretical and experimental studies of photocatalytic degradation systems especially, in dye cases.