关键词: 流态化, 黏性颗粒, 聚团, 欧拉法, 拉格朗日法

Abstract: The agglomeration of cohesive particles in fluidization process is due to the inter-particle forces such as van der Waals force, liquid bridging force and electrostatic force, which affects the normal operation of fluidized bed reactors. The continuum, discrete particle and pseudo-particle models have their advantages and disadvantages in investigation of the agglomerating fluidization behavior. The continuum model based on Eulerian method can not describe the specific interaction between cohesive particles, while the numerical model based on Lagrangian method shows great advantages in multi-scale studies on the fluidization of cohesive particles in terms of mechanic analysis, particle collision and agglomeration flow. However, the discrete particle model can only be used to simulate a finite number of particles and the pseudo-particle model only works well for the micro-scale systems, due to the tremendous amount of computing. With the development of high performance computers, the Lagrangian methods will have wide application prospects.

Key words: fluidization, cohesive particles, agglomerate, Eulerian method, Lagrangian method