Riser Simulation and Radial Porosity Distribution Characterization for Gas-Fluidized Bed of Cork Particles  

作　　者：WU Guorong OUYANG Jie LI Qiang 

机构地区：[1]Department of Mathematics,Gansu Normal University for Nationalities [2]School of Science,Northwestern Polytechnical University

出　　处：《Journal of Thermal Science》2014年第4期368-374,共7页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(10871159);the Presidential Foundation of Gansu Normal University for Nationalities(201301)

摘　　要：Numerical simulations are carried out for gas-solid fluidized bed of cork particles, using discrete element method. Results exhibit the existence of a so-called anti core-annular porosity profile with lower porosity in the core and higher porosity near the wall for non-slugging fluidization. The tendency to form this unfamiliar anti core-annular porosity profile is stronger when the solid flux is higher. There exist multiple inflection points in the simulated axial solid volume fraction profile for non-slugging fluidization. Results also show that the familiar core-annular porosity profile still appears for slugging fluidization. In addition, the classical choking phenomenon can be captured at the superficial gas velocity slightly lower than the correlated transport velocity.

关 键 词：FLUIDIZATION Multiphase flow SIMULATION Discrete element method Anti core-annular regime 

分 类 号：TQ051.13[化学工程] TG146.21[一般工业技术—材料科学与工程]