DEM SIMULATION OF PARTICLES FLUCTUATION IN A GAS-SOLID BUBBLING BED

The discrete element model of soft ball was applied to simulate the gas-solid flow in a bubbling fluidized bed.The influence of the restitution coefficient and elasticity coefficient of particles on the bubble shape in the dense phase of fluldized bed was investigated.The results showed that the elasticity coefficient had little influence on the macro behavior of the gas-solid flow, but they had great influence on the meso-scale particles fluctuation.A small elasticity coefficient would cause the deformation of particles agglomeration and particles eddy, and would lead to the deviation of studying on the mesoscopic scale of bubbling bed.The restitution coefficient played an important role on the gas-solid flow characteristics of bubbling beds.With the increase of restitution coefficient, the bed height increased, indicating the decrease of energy loss and particles temperature.
DEM particle fluctuation gas-solid bubbling bed numerical simulation
Yingya Wu Jun Hu Xingying Lan Jinsen Gao
State Key Lab of Heavy Oil,China University of Petroleum,Beijing,102249,China
国际会议
The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)
北京
英文
371-376
2014-05-14(万方平台首次上网日期,不代表论文的发表时间)