关键词: 颗粒流, 流态化, 黏结性粗颗粒, 颗粒间作用力, 离散单元法

Abstract: Coarse cohesive particles have been widely used in petroleum，chemical and food industries，but the particle bond behavior would influence production efficiency. The granular flow and fluidization behavior of coarse cohesive particles were summarized，along with the measures to improve the fluidization characteristics. The bonding mechanism，in which the main inter-particle forces were liquid bridge forces and solid bridge forces，was reviewed. According to experimental and numerical studies，amount of moisture，liquid viscosity and temperature could influence the dynamic properties of coarse cohesive particles，and consequently industrial production. Besides，improvement measures of the fluidization characteristics，such as higher gas velocity，equipment modification，were commented. The analysis showed that liquid bridge forces have been researched more systematically and comprehensively，while the bonding mechanism of coarse cohesive particles with solid bridge forces as the main inter-particle forces should be further studied. As with the advance of high performance computing technology，combining the discrete element method with new models of inter-particle forces will be the main and important method to study the granular flow and fluidization behavior of coarse cohesive particles.

Key words: granular flow, fluidization, coarse cohesive particles, inter-particle force, discrete element method