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作者机构:Univ Western Ontario Dept Chem & Biochem Engn London ON N6A 5B9 Canada Reactech Proc Dev Inc Markham ON Canada
出 版 物:《POWDER TECHNOLOGY》 (粉末工艺学)
年 卷 期:2012年第224卷
页 面:1-11页
核心收录:
学科分类:0817[工学-化学工程与技术] 08[工学]
基 金:Natural and Engineering Research Council (NSERC)
主 题:Optical sensors Downer units CPFD simulation Cluster particle velocity
摘 要:The present study describes the potential intrusive effects of CREC-GS-Optiprobes on the flow pattern in gas-solid downflow units. Granular flows and their interactions with the CREC-GS-Optiprobes are calculated using a CPFD (Computational Particle Fluid Dynamic) numerical scheme in three dimensions, using particle clusters. Once particles dispersed in the column, the numerical simulations revealed that these particles formed a relatively homogeneous suspension with cluster formation and solids accelerating until reaching a fully-developed regime. CPFD simulations showed that two axially aligned CREC-GS-Optiprobes, when placed in the fully developed flow regime, introduce minimum perturbations in the gas-solid suspension. Therefore this CREC-GS-Optiprobe creates a highly illuminated focal region where hydrodynamic parameters can be measured without significant flow disturbance. Thus, this study supports the application of fiber optic probes;such as in the case of the CREC-GS-Optiprobes, which can provide undisturbed axial particle cluster velocity, axial cluster slip velocities, cluster size and solid fraction measurements at strategically selected locations in the gas-solid downer unit. (C) 2012 Elsevier B.V. All rights reserved.