Simulation of Bubble Behavior of Cohesive and Non-Cohesive Particles in Fluidization

Abstract

Abstract:

Abstract： The discrete element method (DEM) was applied to study the bubble behavior of type D particles to analyze the formation and the growing up process of the bubble in fluidized bed, and the effect of cohesive forces on bubbles. The results of DEM simulation reveal that the formation of bubbles in fluidized bed is related to fluidizing velocity; the introduction of cohesive force causes the first occurrence of bubbling to shift to a higher fluidizing velocity. Compared with noncohesive particles, cohesive particle fluidization exhibits a smaller bubble size and lower rise velocity. In addition, the pressure and the particle velocity around the bubble are found to be sensitive to the inter-particle force.

Key words: fluidized-bed, bubble, fluidization, twophase flow, discrete element method (DEM)

CLC Number:

TK 12

MEI Dengfei,FAN Haojie,TIAN Fengguo,CUI Xuan,ZHANG Mingchuan. Simulation of Bubble Behavior of Cohesive and Non-Cohesive Particles in Fluidization[J]. Journal of Shanghai Jiaotong University, 2015, 49(05): 577-582.

References

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