Abstract：The research of particle coating uniformity is summarized, which is mainly divided into coating uniformity of all particles and coating uniformity of single particle. Comparing the current numerical simulation methods of particle coating process, which include the surface renewal model, the Monte Carlo method, the discrete element method-compartment-population balance model and the computational fluid dynamics-discrete element model, the computational fluid dynamics-discrete element model is proposed as a numerical simulation method on the scale of single particle. Based on the comparative analysis of different numerical simulation methods of particle coating process and multi-field coupling characteristics of particle coating, the CFD-DEM-CVD model is proposed to simulate the particle coating process, which couples macroscopic fluid scale, mesoscopic particle scale and microscopic material deposition scale. Besides, the trend of accurate numerical simulation of particle coating process is proposed, which is based on the study of single particle's surface coating mechanism and the multiscale research of distribution of physical fields on the reactor scale.

Keyword：particle coating process; coating uniformity; numerical simulation; computational fluid dynamics-discrete element method-chemical vapor deposition; multiscale coupling