Phenomenological model of the hydrocyclone: Model development and verification for single-phase flow

Hsieh, K.T.; Rajamani, K.

doi:10.1016/0301-7516(88)90065-8

Cited by 111 publications

(62 citation statements)

References 11 publications

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“…There are numerous numerical studies on the flow and the particle motion in hydrocyclones (Boysan et al, 1982;Brennan et al, 2007;Delgadillo and Rajamani, 2005;1996;He et al, 1999;Hsieh and Rajamani, 1988;Hsieh and Rajamani, 1991;Narasimha et al, 2006a;Narasimha et al, 2005;Nowakowski et al, 2004;Nowakowski et al, 2000;Suasnabar, 2000 andNarasimha 2010) and these studies have used a wide range of turbulence and multiphase models. It is well understood that in future studies, the focus should be to model the three-dimensional flow in a hydrocyclone with at least the Reynolds stress model/LES.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

A semi-mechanistic model of hydrocyclones — Developed from industrial data and inputs from CFD

Narasimha

Mainza

Holtham

et al. 2014

International Journal of Mineral Processing

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Please cite this article as: Narasimha, M., Mainza, A.N., Holtham, P.N., Powell, M.S., Brennan, M.S., A semi-mechanistic model of hydrocyclones -developed from industrial data and inputs from CFD, International Journal of Mineral Processing (2014), doi: 10.1016/j.minpro.2014 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ABSTRACTThe flow behavior in hydrocyclones is extremely complex, leading the designers to rely on empirical equations for predicting cyclone performance. A number of classifying cyclone models have been developed and used in mineral comminution circuit simulators in the past. The problem with these empirical cyclone models is that they cannot be used outside the range of conditions under which they were developed. A semi-mechanistic hydrocyclone model is developed using the dimensionless approach based on both the fluid mechanics concepts from

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Section: Accepted M Manuscriptmentioning

confidence: 99%

A semi-mechanistic model of hydrocyclones — Developed from industrial data and inputs from CFD

Narasimha

Mainza

Holtham

et al. 2014

International Journal of Mineral Processing

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“…Thorough literature reviews on flow pattern and performance efficiency of vortex and Coandă effects were carried out prior to the design of the experimental setup ( [7], [17], [12] and [13]). It was then clear that specific hydraulic conditions such as pressure head differences and inlet velocity openings must properly be quantified.…”

Section: Methodology a Design Of The Experimental Setupmentioning

confidence: 99%

“…These effects also may help cope with the fluctuation of water. Vortex effects had been applied in the hydrocyclone and may easily remove fine particles by using centrifugal force especially when the high velocity is observed [6], [7], [8], [9] and [10] Coandă effects had been well applied in aerodynamic design [11], hydropower [12] and stormwater system [13]. Coandă may help to remove light and coarse particles and could regulate the flow water based on its optimized slope condition.…”

mentioning

confidence: 99%

Design of Stormwater Particle Removal System for Small-Scale Urban Hydropower based on the Vortex and Coandă Effects

Kamal¹,

Lee²,

Shin³

et al. 2017

IJET

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Abstract-Small hydropower systems are a future concept for urban regeneration development. Such a system should function properly under tropical conditions, where rainfall is especially abundant. To implement a small-scale urban hydropower system, a special design is needed to handle diverse sedimentary sizes and deposition characteristics of particles in stormwater, which if unattended may disrupt the functioning of turbine-generator components. Combining the effects of stormwater vortex and Coandă was previously suggested to enhance particulate removal efficiency. This paper was prepared based on this concept. The paper specifically aims to quantify the design parameters which are vital for a high removal efficiency system. These optimal design parameters are also presented in detail in this paper.Keyword [5]. Previous studies have highlighted the need to modify the detention outlet to ensure constant flow rates for a more efficient small-scale urban hydropower system [5]. In this paper, stormwater infrastructure refers to a detention pond which could be used for developing small-scale urban hydropower.Specific challenges to the implementation of small-scale urban hydropower systems include stormwater quality and flow fluctuation. In terms of stormwater quality, the infinite variety of sedimentary sizes and deposition characteristics complicate the design of a detention outlet. Stormwater particles range from coarse grains to silts, and are highly dependent on site topography. It is therefore necessary to design a new and unique system that can handle these stormwater particulate varieties. A clean stormwater source is needed for energy generation purposes to avoid problem on turbine erosion which may reduce the performance of energy generation. For example, in big hydropower system, treatments such as screen intake are used to filter large particles from entering the turbine and generator components.Two theories about vortex and Coandă had been investigated in order to ensure the applicability of the effects for removing the particles in stormwater. These effects also may help cope with the fluctuation of water. Vortex effects had been applied in the hydrocyclone and may easily remove fine particles by using centrifugal force especially when the high velocity is observed [6], [7], [8], [9] and [10] Coandă effects had been well applied in aerodynamic design [11], hydropower [12] and stormwater system [13]. Coandă may help to remove light and coarse particles and could regulate the flow water based on its optimized slope condition. In referring of above challenges, one possible solution is to utilize combined effects of stormwater Coandă and vortex, which may not only solve particulate problems, but also stabilize stormwater flow rate. It nevertheless remains imperative to assure clean water source for a small-scale urban hydropower system.The authors therefore proposed a new system designed based on the combined effects of vortex and Coandă, which should be in particular practical for tropical countries with...

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“…particle image velocimetry (PIV) and laser Doppler anemometry (LDA), provide Eulerian representations of the flow. For instance, velocity profiles and turbulence production in a hydrocyclone have been measured using LDA [9,14,16,20]. Velocity vector fields in a hydrocyclone have also been obtained using PIV [25].…”

Section: Eulerian and Lagrangian Flow Visualization Methodsmentioning

confidence: 99%

“…Once the swirl velocity at the wall is known, the tangential velocity at another radius can be calculated. Tangential velocity profiles in hydrocyclones have been measured, for example, by intrusive probes [7] and optical methods [20,22,14,21]. Knowles et al obtained the tangential velocity profiles of anisole droplets with a density of 993 kg/m 3 in a hydrocyclone without an air-core using cine photography [22].…”

Section: Velocity Distributionmentioning

confidence: 99%

A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking

Chang

Hoffmann

2015

Exp Fluids

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Phenomenological model of the hydrocyclone: Model development and verification for single-phase flow

Cited by 111 publications

References 11 publications

A semi-mechanistic model of hydrocyclones — Developed from industrial data and inputs from CFD

A semi-mechanistic model of hydrocyclones — Developed from industrial data and inputs from CFD

Design of Stormwater Particle Removal System for Small-Scale Urban Hydropower based on the Vortex and Coandă Effects

A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking

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