EMMS drag model for simulating a gas-solid fluidized bed of geldart B particles: Effect of bed model parameters and polydisperity
作者机构：School of Chemical Engineering and Materials ScienceChung-Ang University06974 SeoulSouth Korea School of Chemical and Biological EngineeringSeoul National UniversitySan 56-1Shillim-dongKwanak-guSeoul151-742South Korea
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2020年第18卷第4期
页 面：142-154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）] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）]
基 金：This research was supported by Korea Electric Power Corpora-tion(Grant number:R18XA06-14) supported by the Human Resources Development(No.20184030202070)of the Korea Insti-tute of Energy Technology Evaluation and Planning(KETEP)grant funded by the Korea government Ministry of Trade,Industry and Energy
主 题：CFD simulation Energy minimization multi-scale drag Gas-solid fluidized bed Polydisperity Fluidized-bed reactor
摘 要：The energy minimization multi-scale(EMMS)is a heterogeneous drag model widely used to simulate gas-solid fluidized *** this work,we conducted computational fluid dynamics simulations of a gas-solid fluidized bed for Geldart B particles to compare the EMMS with the homogeneous Gidaspow drag *** results from both the homogeneous and heterogeneous drag models were compared with literature experimental data on pressure drop and bed *** was no noticeable difference in predicted bed characteristics in the slugging ***,in the turbulent regime,the EMMS model predicted slightly lower bed expansion than did the Gidaspow *** evaluated the effects of solid-solid and solid-wall interaction parameters by varying the restitution and specularity *** expansion increases by a factor of 1.05-1.08 when the restitution coefficient increases from 0.9 to *** models predict a higher solid volume fraction and higher solid downflow velocity near the wall for a low specularity coefficient of 0.01 or *** we considered solid phases of different sizes to model polydisperity,the simulation predicted vertical segregation of 300,350,and 400μm in the fluidized region due to ***,the drag models made similar predictions in bad characteristics from cold model simulation ofa polysilicon fluidized-bed reactor,although there was very little vertical segregation of solid particles for this case.
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