CFD modeling of hydrocyclones: Prediction of particle size segregation

Narasimha, M.; Brennan, Matthew; Holtham, P. N.

doi:10.1016/j.mineng.2012.05.010

Cited by 58 publications

(32 citation statements)

References 28 publications

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“…There are quite a few reports where neither experimental nor CFD simulation results exhibit fish hook (for example, Lees, 2005;Medronho et al, 2005;Brennan et al, 2007;Narasimha et al, 2012;Bhaskar et al, 2007a). The simulation results of Bhaskar et al (2007b) also do not show fish hook.…”

Section: Cfd Modelsmentioning

confidence: 96%

“…Of these, however, only Hsu et al have validated their results with experimental data. All others (for example, Hwang et al, 2013;Zhang et al, 2011;Shojaeefard et al, 2006;Schutz et al, 2004Schutz et al, , 2010Lees, 2005;Medronho et al, 2005;Bhaskar et al, 2007aBhaskar et al, , 2007bNarasimha et al, 2012;Ghodrat et al, 2012;Kuang et al, 2012;Zhu et al, 2012b etc. ) do not report it.…”

Section: Cfd Modelsmentioning

confidence: 99%

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Fish hook effect in centrifugal classifiers – a further analysis

Nageswararao¹,

Medronho

2014

International Journal of Mineral Processing

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Section: Cfd Modelsmentioning

confidence: 96%

Section: Cfd Modelsmentioning

confidence: 99%

Fish hook effect in centrifugal classifiers – a further analysis

Nageswararao¹,

Medronho

2014

International Journal of Mineral Processing

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“…The single particle based Lagrangian considerations is less relevant for the concentrations of particle fractions at given points and times in the hydroclone. Therefore, recent works on hydrocyclones by Narasimha et al, Vakamalla and Mangadoddy, Wang, Davailles et al, and Ghodrat have focused on Eulerian descriptions of the turbulent multiphase flow of the hydrocyclone. The advantages of this concept become particularly obvious if one calculates steady and unsteady state of the concentration distributions in hydrocyclones .…”

Section: Literature Reviewmentioning

confidence: 99%

The dynamic behaviour of a large‐scale 250‐mm hydrocyclone: A CFD study

Vakamalla

Mangadoddy

2019

Asia-Pacific J Chem Eng

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The fluctuating feed solid contents usually cause instationarities in industrial hydrocyclone separation. This demands a controlling mechanism for stabilizing the separation effect. Understanding the transitional/dynamic behaviour is necessary to design such control mechanisms. In this context, the present paper is aimed to understand the dynamic behaviour of a large-scale 250-mm hydrocyclone in terms of air core development and solid concentration distributions using the modified mixture model coupled with large eddy simulation turbulence model. Numerically predicted two-phase flow field data is validated against laser Doppler velocimetry data at two axial positions. A close agreement is found between the modified mixture model predicted particle classification curve and experimental data. Longer residence time is observed with near cut size particle compared to the and fine size particles. Further, the analysis of the equilibrium radius of different solid particles inside the cyclone in the presence of turbulence is compared with the classical Kelsall experiments and observed that the classification of particles influenced by both the turbulent dispersion and the centrifugal force. Finally, the effect of feed solids concentration (10-50 wt%) on the hydrocyclone performance and particle segregation is also undertaken in this study.

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“…where t drain is the drainage time and t cont is the contact time for the two droplets which can be evaluated, respectively by the following terms: (27) where h i is the initial thickness, h cr is the critical film thickness and r ij is the equivalent radius. …”

Section: Coalescence Modelmentioning

confidence: 99%

Analysis of droplet behavior in a de-oiling hydrocyclone

Huang

2016

Journal of Dispersion Science and Technology

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A mechanical separation process in a de-oiling hydrocyclone is described in which disperse oil droplets are separated from a continuous water phase. This separation process is influenced by the droplet breakage and coalescence. Based on experimental data and simulation results in a stirred tank, a modified breakage model which can be applied to droplet breakage in the de-oiling hydrocyclone is developed. Then, a simulation model is developed coupling the numerical solution of the flow field in the hydrocyclone based on computational fluid dynamics with population balances. The homogenous discrete method and the inhomogeneous discrete method are applied for solving population balance model (PBM). The investigations show that the numerical results obtained by the simulation model coupled with the modified PBM using the inhomogeneous discrete method are good accordance with experimental data under high flow rate. According to this simulation model, the effect of three different inlet designs on the separation efficiency of the de-oiling hydrocyclone has been discussed. The results indicate that the separation efficiency of the de-oiling hydrocyclone can be improved with an appropriate inlet design. Downloaded by [University of California, San Diego] at 03:21 28 March 2016 2

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CFD modeling of hydrocyclones: Prediction of particle size segregation

Cited by 58 publications

References 28 publications

Fish hook effect in centrifugal classifiers – a further analysis

Fish hook effect in centrifugal classifiers – a further analysis

The dynamic behaviour of a large‐scale 250‐mm hydrocyclone: A CFD study

Analysis of droplet behavior in a de-oiling hydrocyclone

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