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题名: Computational Investigation of the Mechanisms of Particle Separation and "Fish-Hook" Phenomenon in Hydrocyclones
作者: Wang, B(王博); Yu, AB
收录类别: SCIE ; EI
出版日期: 2010-07
刊名: AICHE JOURNAL
卷号: 56, 期号:7, 页码:1703-1715
出版者: WILEY
出版地: HOBOKEN
英文摘要: The motion of solid particles and the "fish-hook" phenomenon in an industrial classifying hydrocyclone of body diameter 355 mm is studied by a computational fluid dynamics model. In the model, the turbulent flow of gas and liquid is modeled using the Reynolds Stress Model, and the interface between the liquid and air core is modeled using the volume of fluid multiphase model. The outcomes are then applied in the simulation of particle flow described by the stochastic Lagrangian model. The results are analyzed in terms of velocity and force field in the cyclone. It is shown that the pressure gradient force plays an important role in particle separation, and it balances the centrifugal force on particles in the radial direction in hydrocyclones. As particle size decreases, the effect of drag force whose direction varies increases sharply. As a result, particles have an apparent fluctuating velocity. Some particles pass the locus of zero vertical velocity (LZVV) and join the upward flow and have a certain moving orbit. The moving orbit of particles in the upward flow becomes wider as their size decreases. When the size is below a critical value, the moving orbit is even beyond the LZVV. Some fine particles would recircuit between the downward and upward flows, resulting in a relatively high separation efficiency and the 'fish-hook" effect. Numerical experiments were also extended to study the effects of cyclone size and liquid viscosity. The results suggest that the mechanisms identified are valid, although they are quantitatively different. (C) 2009 American Institute of Chemical Engineers AIChE J, 56: 1703-1715, 2010
关键词: hydrocyclone ; multiphase flow ; computational fluid dynamics ; separation mechanism ; fish-hook effect
作者部门: [Wang, B. ; Yu, A. B.] Univ New S Wales, Lab Simulat & Modelling Particulate Syst, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia ; [Wang, B.] Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China
通讯作者: Yu, AB (reprint author), Univ New S Wales, Lab Simulat & Modelling Particulate Syst, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia.
学科分类: Engineering
文章类型: Article
所属项目编号: Australian Research Council
所属项目名称: 澳大利亚研究理事会项目
项目资助者: ARC
语种: 英语
DOI: 10.1002/aic.12114
ISSN号: 0001-1541
WOS记录号: WOS:000278890800004
EI记录号: 20103413175174
第一机构:
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/119984
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Wang, B,Yu, AB. Computational Investigation of the Mechanisms of Particle Separation and "Fish-Hook" Phenomenon in Hydrocyclones[J]. AICHE JOURNAL,2010,56(7):1703-1715.
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