Identification and prediction of air core diameter in a hydrocyclone by a novel online sensor based on digital signal processing technique

Krishna, Venkat; Sripriya, R.; Kumar, Vivek; Chakraborty, Sudipto; Meikap, B.C.

doi:10.1016/j.cep.2010.01.003

Cited by 17 publications

(10 citation statements)

References 12 publications

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“…The air core shows other irregularities, in that it is generally of constant diameter throughout the cyclone length. 9 Though the consistent use of hydrocyclones has been occurring since the 1950s, the full comprehension of the operation is still ambiguous. As they have many advantages and have been used in many industries, this research work seeks to develop a new approach and improvement in the design and operation of hydrocyclones.…”

Section: Air Core Formationmentioning

confidence: 99%

“…The overflow and underflow split was controlled in the hydrocyclone by regulating the underflow valve at a particular feed flow rate conditions. We have three control valves one at feed line connected with rotameter, another one at overflow and third one at underflow (Krishna et al 9 ). However, to control split ratio underflow valve was used without doing any flow disturbances.…”

Section: Vofmentioning

confidence: 99%

“…Many investigations have been performed to describe and improve the design of hydrocyclones. [3][4][5][6][7][8][9] Depending on the objective of the operation hydrocyclones are of two types. The first one is a Thickener.…”

Section: Introductionmentioning

confidence: 99%

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Retracted: Three‐dimensional computational fluid dynamic modeling and simulation of fine particle separation from water by a hydrocyclone

et al. 2011

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In hydrocyclone, the separation involves a complex three-dimensional swirling flow. To improve the design and operation of hydrocyclones, it is important to investigate to flow profile and particle motion for enhanced separation. A three-phase computational fluid dynamics (CFD) model was developed to predict the flow patterns in the hydrocyclone, including prediction of the air core formation. The CFD method was used to simulate the flow fields inside a hydrocyclone to predict its separation efficiency. Three models, k-" model, Reynolds stress model (RSM), and Reynolds stress turbulence model with volume of fluid multiphase model for simulating air core, were compared for the predictions of velocity, axial, and tangential velocity distributions and separation efficiency. It is seen that the percentage of particles to underflow increases with particle size. Results indicate that the turbulence and discrete phase mode effects are clearly represents for predicting the experimental data with enhances separation efficiency.

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Section: Air Core Formationmentioning

confidence: 99%

Section: Vofmentioning

confidence: 99%

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Retracted: Three‐dimensional computational fluid dynamic modeling and simulation of fine particle separation from water by a hydrocyclone

et al. 2011

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“…This is due to the presence of air core, zones of flow reversion, regions of recirculation, high vortex preservation and high turbulence intensity, among others [6][7][8]. Hydrocyclone application, therefore, is limited for the particles and/or droplets bigger than 10 m [5,9].…”

Section: Introductionmentioning

confidence: 99%

Non-Isothermal Separation Process of Two-Phase Mixture Water/Ultra-Viscous Heavy Oil by Hydrocyclone

Souza¹,

Farias²,

Swarnakar³

et al. 2011

ACES

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Environmental agencies do not allow effluents, from the petroleum productions, which contain oil concentrations that exceed the amounts permitted by the regulations. In recent time heavy oil operating petroleum industries are generating oil/water mixture by products, which are difficult to separate. Industrially, hydrocyclone is generally used to separate oil from an oil/water mixture. This is due to its high performance of separation, low cost of installation and maintenance. In the present work, therefore, the thermal fluid dynamics of water/ultra-viscous heavy oil separation process in a hydrocyclone has been studied. A steady state mathematical model which simulates the performance of a non-isothermal separation process is presented. The Eulerian-Eulerian approach for the interface of the phases involved (water/ultra-viscous heavy-oil) is used and the two-phase flow is considered as incompressible, viscous and turbulent. For carrying out numerical solutions of the governing equations the CFX11 ® commercial code was used. Results of the behavior of the two-fluid flow inside the hydrocyclone and separation efficiency are presented and analyzed. The role of the average temperature of the fluid, oil droplet diameter and the fluid mixture inlet velocity on the separation efficiency of the hydrocyclone are verified.

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“…With the advantages of relative simplicity to fabricate, low cost to operate, and good adaptability to extremely harsh conditions, cyclone separators have become one of the most important particle removal devices which are preferably utilized in scientific and engineering fields (Raoufi et al, 2008). Since cyclones have been used extensively in various industries, a considerable number of experimental, numerical and theoretical investigations have been performed on different types of cyclone separators (Dwari et al, 2004;Sripriya et al, 2007;Gupta et al, 2008;Krishna et al, 2010). Stairmand (1985) presented one of the most popular design guides which suggested that the cylinder height and exit tube length be, respectively, 1.5 and 0.5 times of the cyclone body diameter for the design of a high efficiency cyclone.…”

Section: Introductionmentioning

confidence: 99%

Effects of Using Ribs on Flow Pattern and Performance of Cyclone Separators

Farahani

Tahmasbi

Safikhani

et al. 2011

Engineering Applications of Computational Fluid Mechanics

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ABSTRACT:In this paper, the effects of using ribs on the flow pattern and performance of cyclone separators are investigated using CFD techniques. The Reynolds averaged Navier-Stokes equations with Reynolds Stress Turbulence Model (RSTM) are solved by use of the finite volume method based on the SIMPLE pressure correction algorithm in the computational domain. The Eulerian-Lagrangian computational procedure is used to predict particles tracks in cyclones with different rib pitch to cyclone diameter (P/D) ratios. The velocity fluctuations are simulated using Discrete Random Walk (DRW). The results show that using ribs in cyclones leads to higher collection efficiency but higher pressure drop and the cyclone with P/D equal to 1 has the maximum collection efficiency among the ribbed cyclones and the cyclone without ribs has the least pressure drop.

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Identification and prediction of air core diameter in a hydrocyclone by a novel online sensor based on digital signal processing technique

Cited by 17 publications

References 12 publications

Retracted: Three‐dimensional computational fluid dynamic modeling and simulation of fine particle separation from water by a hydrocyclone

Retracted: Three‐dimensional computational fluid dynamic modeling and simulation of fine particle separation from water by a hydrocyclone

Non-Isothermal Separation Process of Two-Phase Mixture Water/Ultra-Viscous Heavy Oil by Hydrocyclone

Effects of Using Ribs on Flow Pattern and Performance of Cyclone Separators

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