CFD-DEM study of impacts of the porous distributor medium on fluidization characteristics of a 2D-fluidized bed
作者机构：School of Mechanical EngineeringHefei University of TechnologyHefei230009China
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2024年第87卷第4期
页 面：54-73页
核心收录：
学科分类：080704[工学-流体机械及工程] 0817[工学-化学工程与技术] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）]
基 金：support provided by the National Natural Science Foundation of China (grant Nos.51806053,52075139) the Fundamental Research Funds for the Central Universities (grant No.JZ2021HGTB0090)
主 题：Fluidized bed CFD-DEM Porous medium Bubble dynamics Solid mixing
摘 要：Gas-solid bubbling fluidized beds are widely used in chemical,energy,construction,and other industrial fields due to their excellent fluidization performance.2D-fluidized beds with planar rectangular columns of finite thickness are widely used in fluidized bed studies,and it is essential for understanding the hydrodynamics of gas-particle ***,the distributor(porous medium)at the bottom of the bed has a crucial influence on the fluidization performance of the 2D-fluidized *** this work,the fluidization mechanism and gas-solid dynamic characteristics of the fluidized bed under three porous media are studied by CFD-DEM coupled with the porous medium model,and the accuracy of numerical simulation is verified by a high-speed photography *** show that with the increase in the flow resistance of the porous medium,the average and standard deviation of the bubble diameter decrease,and the time and position of particles in the dead zone to participate in the core-annular flow *** a low fluidization velocity,the dead zone in the bed can be considerably reduced by increasing the flow resistance.
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