Investigations on the flow and separation behaviour of hydrocyclones using computational fluid dynamics

Schuetz, S.; Mayer, Günter; Bierdel, Michael; Piesche, Manfred

doi:10.1016/s0301-7516(03)00075-9

Cited by 78 publications

(37 citation statements)

References 14 publications

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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%

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%

Performance of hydrocyclones with different geometries

et al. 2011

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“…The RSM (Reynolds Stress Model) turbulence model (Fluent, 2008;Vieira, 2006) 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 (Schuetz et al, 2004;Cullivan et al 2004;Medronho et al, 2005;Bhaskar et al 2007;Vieira et al 2007). A detailed discussion of the numerical method is given by Fluent (2008).…”

Section: Cfd Simulationsmentioning

confidence: 99%

Influence of geometric dimensions on the performance of a filtering hydrocyclone: an experimental and cfd study

Oliveira

Almeida

Vieira

et al. 2009

Braz. J. Chem. Eng.

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-Filtering hydrocyclone is a device that was developed and patented by the Particulate System Research Group at the Federal University of Uberlandia. This equipment consists of a hydrocyclone whose conical section is replaced by a conical filtering wall. Thus, during the operation of these devices, besides the underflow and overflow streams, there is another stream of liquid, resulting from the filtrate produced in the porous cone. In the present work, the influence of some geometric variables of a filtering hydrocyclone was analyzed by an experimental and CFD study. The geometric variables analyzed were underflow orifice diameter (D U ) and vortex finder length (ℓ). Data from a conventional hydrocyclone of the same configuration were also obtained. The results indicated that the performance of hydrocyclones is significantly influenced by the conical filtering wall. The incorporation of the filtering medium decreased the Euler numbers and increased the total efficiency of the hydrocyclones. Depending on the specific functions of the separator (as a classifier or concentrator) the best values of D U and ℓ were also found for the filtering hydrocyclone.

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“…Schuetz et al [27] used the Reynolds Stress Model (RSM) to predict the velocity and pressure distribution, and the grade efficiency curve in a hydrocyclone. They compared their numerical simulations with experimental results and reported close agreement, especially for the pressure drop and separation efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Hydrocyclone for the Separation of Light and Heavy Particles in Aqueous Slurry

et al. 2015

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This paper describes an experimental and modelling investigation of a hydrocyclone for the separation of light and heavy particles in an aqueous slurry. The effects of overflow pressure, feed flow rate, particle size, vortex finder length, and particle concentration are investigated. A model based on the governing conservation equations for mass and momentum is solved using a commercial software package, Ansys 12 Fluid Dynamics. Turbulence is modelled using the large eddy simulation, and the discrete particle model is used to predict the particle separation. It is shown by experimentation and modelling that increasing the vortex finder length results in an increase in the recovery of light particles in the overflow. The recovery of light particles increases as their size increases. Increasing the feed flow rate and decreasing the solid concentration in the feed also improves light particle recovery. A computational model based on LES gave close agreement with experimental results for low overall particle concentration.

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Investigations on the flow and separation behaviour of hydrocyclones using computational fluid dynamics

Cited by 78 publications

References 14 publications

Performance of hydrocyclones with different geometries

Performance of hydrocyclones with different geometries

Influence of geometric dimensions on the performance of a filtering hydrocyclone: an experimental and cfd study

A Study of the Hydrocyclone for the Separation of Light and Heavy Particles in Aqueous Slurry

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