New understanding of a hydrocyclone flow field and separation mechanism from computational fluid dynamics

Cullivan, J. C.

doi:10.1016/s0892-6875(04)00092-5

Cited by 17 publications

(23 citation statements)

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“…The RSM turbulence model (Pope, 2000) deals with the effects of streamline curvature, swirl, and rapid changes in the strain rate in a more rigorous manner than the classical k − ε model does. Therefore, this model (RSM) has a greater potential to accurately predict complex flows, as in the case of hydrocyclones (Cullivan et al, 2004;Schuetz et al, 2004;Medronho et al, 2005;Bhaskar et al, 2007;Vieira et al, 2007). The RSM disregards the hypothesis of isotropy of the flow and introduces for each of the tensor of Reynolds, a transport equation for the specific closing of RANS.…”

Section: Cfd Simulationsmentioning

confidence: 99%

“…Advances in computational technology, in recent years, have led to models based on fundamental fluid flow, taking central stage as tools that will enhance the understanding of flow fields within the hydrocyclone and bring about improvements in the design of this unit operation. Computational fluid dynamics (CFD) is a versatile means to study the fluid dynamics of many physical systems and it has been used widely in engineering applications (Medronho et al, 2005;Vieira Neto et al, 2008;Duarte et al, 2009), including modelling flow in hydrocyclones (Cullivan et al, 2004). Simulations of hydrocyclones using the incompressible Navier-Stokes equations supplemented by a suitable turbulence model have been shown to be appropriate for modelling the flow in a hydrocyclone (Schuetz et al, 2004;Narasimha et al, 2005;Mainza et al, 2006;Bhaskar et al, 2007;Hsu and Wu, 2008;Oliveira et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The literature shows the use of various turbulence models to explain the flow within hydrocyclones. In general, the Reynolds stress model (RSM), DSM, and LES (Cullivan et al, 2004;Schuetz et al, 2004;Mainza et al, 2006;Oliveira et al, 2009) are more effective turbulence model to represent turbulent and swirl flow inside hydrocyclones when compared to k − ω, k − ε, and RNG models (Narasimha et al, 2005) which are suitable for free flow without vortices. Bhaskar et al (2007) have studied the use of different turbulence models, that is, standard k − ε, k − ε RNG, and RSM in CFD simulations of hydrocyclone.…”

Section: Introductionmentioning

confidence: 99%

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Performance of hydrocyclones with different geometries

et al. 2011

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Hydrocyclones belong to an important group of equipments designed to solid-liquid or liquid-liquid separation in a centrifugal field. It is possible to adapt a hydrocyclone to the accomplishment of several industrial activities depending on the geometrical relations among its main dimensions. The operation and design of these devices are relatively simple; however, the flow inside them is very complex and its prediction is very difficult. For that reason, most models that are used to predict hydrocyclone performance are empirical ones. The objective of this work was to study the influence of geometric variables in the performance of hydrocyclones, using CFD and response surface techniques. The obtained results show that it was possible to find an optimum hydrocyclone design, that is, geometric relationships that lead to Euler number and cut size in minimum levels.Les hdrocyclones appartiennentà un groupe important d'équipements conçus pour la séparation solide-liquide ou liquide-liquide dans un champ centrifuge. Il est possible d'adapter un hydrocycloneà la réalisation de plusieurs activités industrielles selon les relations géométriques dans ses dimensions principales. Le fonctionnement et la conception de ces dispositifs sont relativement simples; cependant, leur circulation interne est très complexe et sa prédiction est très difficile. Pour cette raison, la plupart des modèles utilisés pour prédire le rendement des hydrocyclones sont des modèles empiriques. L'objectif de ce travailétait d'étudier l'influence des variables géométriques sur le rendement des hydrocyclones en utilisant une DFN et des techniques de surface de réponse. Les résultats obtenus indiquent qu'ilétait possible de trouver une conception d'hydrocyclones optimale, c.-à-d. les relations géométriques qui mènent au nombre d'Euler età la mesure fixeà des niveaux minimaux.

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Section: Cfd Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance of hydrocyclones with different geometries

et al. 2011

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“…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%

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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“…At present, the hydrodynamics in hydrocyclone has been investigated using CFD, and the particle separation efficiency [11] has also been predicted, and their dimensions have been designed. Compared to the semi-empirical model, Schuetz et al [12] found that the application of CFD is economical and lasting for designing the hydrocyclone.…”

Section: Introductionmentioning

confidence: 99%

Simulation and evaluation of the performance and feasibility of two‐stage industrial hydrocyclones for CaSO₄ removal in potassium chloride production

Song

Sun

et al. 2015

Can J Chem Eng

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The hydrocyclone separator system, a solid/liquid separation method, has been widely used in chemical, mineral, environmental, and power processing. In this study, two‐stage industrial hydrocyclones were used to separate CaSO4 impurity from the crude carnallite in KCl production by computational fluid dynamics (CFD). The CFD technique was a useful tool to evaluate the performance and feasibility of the two‐stage industrial hydrocyclones with diameters larger than 400 mm. The simulated results were validated by industrial‐scale experiments. The CFD results showed that 38.2 wt. % CaSO4 could be removed by the two‐stage industrial hydrocyclone. The feasibility and effectiveness of the hydrocyclone separation system were finally evaluated by the simulation.

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New understanding of a hydrocyclone flow field and separation mechanism from computational fluid dynamics

Cited by 17 publications

References 0 publications

Performance of hydrocyclones with different geometries

Performance of hydrocyclones with different geometries

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

Simulation and evaluation of the performance and feasibility of two‐stage industrial hydrocyclones for CaSO₄ removal in potassium chloride production

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New understanding of a hydrocyclone flow field and separation mechanism from computational fluid dynamics

Cited by 17 publications

References 0 publications

Performance of hydrocyclones with different geometries

Performance of hydrocyclones with different geometries

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

Simulation and evaluation of the performance and feasibility of two‐stage industrial hydrocyclones for CaSO4 removal in potassium chloride production

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Simulation and evaluation of the performance and feasibility of two‐stage industrial hydrocyclones for CaSO₄ removal in potassium chloride production