Three-dimensional multi-phase simulation of the mixing and segregation of binary particle mixtures in a two-jet spout fluidized bed  

作　　者：Xiaojia Wang Baosheng Jin Yanyan Wang Chunhong Hu 

机构地区：[1]Key Laboratory of Energy Thermal Conversion and Control,Ministry of Education,School of Energy & Environment,Southeast University

出　　处：《Particuology》2015年第5期185-193,共9页颗粒学报（英文版）

基　　金：Financial support for the reported research by the National Natural Science Foundation of China(51076029);the Ministry of Science and Technology of China(China-EU International Collaboration Project 2010DFA61960);the Scientific Research Foundationof Graduate School of Southeast University(YBPY1401,YBJJ1119);China Academic Award for Doctoral Candidates is gratefully acknowledged

摘　　要：This study presents a three-dimensional numerical study of the mixing and segregation of binary particle mixtures in a two-jet spout fluidized bed based on an Eulerian-Eulerian three-fluid model. Initially, the particle mixtures were premixed and packed in a rectangular fluidized bed. As the calculation began, the gas stream was injected into the bed from the distributor and jet nozzles. The model was validated by comparing the simulated jet penetration depths with corresponding experimental data. The main features of the complex gas-solid flow behaviors and the mechanism of mixing and segregation of the binary mixtures were analyzed, Moreover, further simulations were carried out to evaluate the effects of operating conditions on the mixing and segregation of binary particle mixtures. The results illustrate that mixing can be enhanced by increasing the jet velocity or enlarging the difference of initial proportions of binary particle mixtures.This study presents a three-dimensional numerical study of the mixing and segregation of binary particle mixtures in a two-jet spout fluidized bed based on an Eulerian-Eulerian three-fluid model. Initially, the particle mixtures were premixed and packed in a rectangular fluidized bed. As the calculation began, the gas stream was injected into the bed from the distributor and jet nozzles. The model was validated by comparing the simulated jet penetration depths with corresponding experimental data. The main features of the complex gas-solid flow behaviors and the mechanism of mixing and segregation of the binary mixtures were analyzed, Moreover, further simulations were carried out to evaluate the effects of operating conditions on the mixing and segregation of binary particle mixtures. The results illustrate that mixing can be enhanced by increasing the jet velocity or enlarging the difference of initial proportions of binary particle mixtures.

关 键 词：Fluidized bed Binary particle mixture MIXING SEGREGATION Numerical simulation Three-fluid model 

分 类 号：TQ021.1[化学工程]