Development of water split model for a 76mm hydrocyclone

Shah, H.; Majumder, A. K.; Barnwal, J. P.

doi:10.1016/j.mineng.2005.07.020

Cited by 14 publications

(5 citation statements)

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“…As reported by many authors (Plitt et al, 1987;Concha et al, 1996), the separation performance of an industrial hydrocyclone is controlled by the cone ratio (ratio of the spigot to the vortex finder). Shah et al (2006) suggested that the use of cone ratio as a design variable is insignificant and can sometimes be misleading. The diameter of the vortex finder (D o ) and spigot (D u ) individually has an effect on the water split behavior in hydrocyclone.…”

Section: Effect Of Outlet Diameters (Design Variables)mentioning

confidence: 99%

Performance monitoring of a hydrocyclone based on underflow discharge angle

Dubey

Climent

Banerjee

et al. 2016

International Journal of Mineral Processing

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The performance of a hydrocyclone as a separation device is never perfect and rigorous research efforts are still continuing along various directions towards achieving optimum solutions. The modus operandi of performance optimization is important for quick and non-invasive monitoring of hydrocyclone performance. Therefore, in the present study, an application potential of spray angle as a performance monitoring tool has been explored to investigate the operation state of a hydrocyclone. In this context, phenomenological features of spray discharge over a wide range of injection pressure and feed solid concentration have been investigated. The emphasis of the present study is to verse the amendment of the hydrocyclone operational state with the corresponding change in underflow discharge pattern. The pattern of the underflow discharge profile was captured using a digital camera and analyzed based on an image processing algorithm to detect the discharge angle under different operating and design conditions. Stability and reproducibility of the spray angle at fixed operating condition have also been confirmed. Subsequent analysis shows that the spray angle is sensitive to variations of operating and design variables. More specifically the effect of feed slurry concentration has been characterized and is of major importance for the transition to roping. On this basis, an attempt has also been made to develop an empirical correlation based on experimental data. The developed correlation shows that the discharge angle could possibly be used as a reliable tool to monitor hydrocyclone performance.

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Section: Effect Of Outlet Diameters (Design Variables)mentioning

confidence: 99%

Performance monitoring of a hydrocyclone based on underflow discharge angle

Dubey

Climent

Banerjee

et al. 2016

International Journal of Mineral Processing

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“…Thus, as a series of studies, to simplify the verification process, the water split was adopted to verify the simulation results. Note that the water split means that the ratio of water reporting through each outlet, which clearly influences the device classification efficiency [21]; thus, this parameter can be used to verify the CFD simulation [22].…”

Section: Validationmentioning

confidence: 99%

Computational Modeling of Flow Characteristics in Three Products Hydrocyclone Screen

Wang

Liu

et al. 2021

Processes

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Three products hydrocyclone screen (TPHS) can be considered as the combination of a conventional hydrocyclone and a cylindrical screen. In this device, particles are separated based on size under the centrifugal classification coupling screening effect. The objective of this work is to explore the characteristics of fluid flow in TPHS using the computational fluid dynamics (CFD) simulation. The 2 million grid scheme, volume fraction model, and linear pressure–strain Reynolds stress model were utilized to generate the economical grid-independence solution. The pressure profile reveals that the distribution of static pressure was axisymmetric, and its value was reduced with the increasing axial depth. The maximum and minimum were located near the tangential inflection point of the feed inlet and the outlets, respectively. However, local asymmetry was created by the left tangential inlet and the right screen underflow outlet. Furthermore, at the same axial height, the static pressure gradually decreased along the wall to the center. Near the cylindrical screen, the pressure difference between the inside and the outside cylindrical screen dropped from positive to negative as the axial depth increased from −35 to −185 mm. Besides, TPHS shows similar distributions of turbulence intensity I, turbulence kinetic energy k, and turbulence dissipation rate ε; i.e., the values fell with the decrease in axial height. Meanwhile, from high to low, the pressure values are distributed in the feed chamber, the cylindrical screen, and conical vessel; the value inside the screen was higher than the outer value.

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“…Over the past few decades, several models (Moder and Dahlstrom, 1952;Yoshioka and Hotta, 1955;Abbot, 1962;Bradly, 1965;Plitt et al, 1990;Shah et al, 2006;Narasimha et al, 2014;Banerjee et al, 2015) have been proposed to compute water split in classifying cyclones. The aforementioned models are, however, far from being adequate to address various intricate issues of complex hydrodynamic features.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic modelling of water partitioning behaviour in hydrocyclone

Banerjee

Climent

Majumder

2016

Chemical Engineering Science

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 18144 a b s t r a c tA new mechanistic model on water split behaviour in a hydrocyclone has been developed based on the convoluted hydrodynamics of swirling flows in a confined environment. A comprehensive study has been accomplished on the genesis and subsequent distribution of G force based on the characterization of internal flow features of a 2 in hydrocyclone through computational fluid dynamics (CFD) approach. The difference between the magnitude of G force in cylindrical and spigot regions is taken into account as a new hydrodynamic parameter to compute the water split behaviour. Specifically, our analysis reveals a semi-empirical relationship between the water split with G force difference (Δ ) G , the vortex finder diameter (D vf ) and the spigot diameter (D sp ). The developed model is validated against experimental data and show good prediction accuracy. Unique aspect of the developed empirical model is that the underlying mechanism of incipient flow peculiarity is implicitly accounted to rummage the separation characteristics in a quantifiable manner. In addition to rationalize the flow split behaviour of hydrocyclones, this new hydrodynamic indicator seems promising to be used as a scale-up parameter in envisaging the separation performance for a given application.

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Development of water split model for a 76mm hydrocyclone

Cited by 14 publications

References 1 publication

Performance monitoring of a hydrocyclone based on underflow discharge angle

Performance monitoring of a hydrocyclone based on underflow discharge angle

Computational Modeling of Flow Characteristics in Three Products Hydrocyclone Screen

Mechanistic modelling of water partitioning behaviour in hydrocyclone

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