Euler-Euler CFD modeling of fluidized bed:Influence of specularity coefficient on hydrodynamic behavior

作     者：Chanchal Loha Himadri Chattopadhyay Pradip K.Chatterjee 

作者机构：Thermal Engineering GroupCSIR-Central Mechanical Engineering Research Institute Department of Mechanical EngineeringJadavpur University 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2013年第11卷第6期

页      面：673-680页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the support of Department of Science&Technology(Govt.of India)through PURSE scheme 

主　　题：Fluidized bed Hydrodynamics Specularity coefficient CFD 

摘      要：Euler-Euler two-fluid model is used to simulate the hydrodynamics of gas-solid flow in a bubbling flu- idized bed with Geldert B particles where the solid property is calculated by applying the kinetic theory of granular flow （KTGF）. Johnson and Jackson wall boundary condition is used for the particle phase, and different amount of slip between particle and wall is given by varying the specularity coefficient （φ） from 0 to 1. The simulated particle velocity, granular temperature and particle volume fraction are compared to investigate the effect of different wall boundary conditions on the hydrodynamic behavior, Some of the results are also compared with the available experimental data from the literature. It was found that the model predictions are sensitive to the specularity coefficient. The hydrodynamic behavior deviated sig- nificantly for φ = 0 and φ = 0.01 with maximum deviation found at φ = 0 i.e. free-slip condition. However, the overall bed height predicted by all the conditions is similar.