A study of the fluid dynamic behaviour of filtering hydrocyclones

Vieira, Luiz Gustavo Martins; Silva, Carlos Antônio da; Damasceno, João Jorge Ribeiro; Barrozo, M. A. S.

doi:10.1016/j.seppur.2007.05.029

Cited by 54 publications

(42 citation statements)

References 12 publications

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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%

“…The same simulation strategy adopted in our previous paper (Vieira et al, 2007) has been used here. So, the simulations were performed using the computational fluid dynamics package Fluent, using a twodimensional double precision, steady-state segregated solver.…”

Section: Cfd Simulationsmentioning

confidence: 99%

“…However, these models suffer from the same inherent deficiency as any other empirical models -the model can only be used within the extremes of the experimental data from which the model parameters were determined. In view of this shortcoming, mathematical models based on fluid mechanics are highly desirable (Vieira et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Computational Fluid Dynamics Techniques (CFD) have been concomitantly and alternatively used in cyclone and hydrocyclone studies (Medronho et al, 2005;Narasimha et al, 2005;Mainza et al, 2006;Bhaskar et al 2007;Vieira et al 2007). This technique is a versatile means to study the fluid dynamics of many physical systems and it has been widely used in engineering applications.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Cfd Simulationsmentioning

confidence: 99%

Section: Cfd Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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show abstract

“…Despite the advantage of the conventional hydrocyclones, this device has undergone many modifications to enable it to meet specific process requirements (Souza et al, 2000;Vieira et al, 2005Vieira et al, , 2007Oliveira et al, 2009). Mainly due to the demand for hydrocyclones in applications where conventional configurations fail to meet process requirements.…”

Section: Introductionmentioning

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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Performance of a New Geometry of Deoiling Hydrocyclones: Experiments and Numerical Simulations

et al. 2012

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A new geometry of liquid-liquid hydrocyclones is proposed seeking to perform the separation of oil emulsified in water. The hydrocyclone performance was investigated by means of a factorial experimental design (2 3 ) leading to a total of ten experiments. The results enabled the determination of empirical mathematical models that describe capacity, total separation efficiency, and flow ratio as a function of oil concentration in the feed inlet, operating pressure drop, and presence or absence of a vortex finder in the geometry. Numerical simulations were also carried out to further understand the flow field characteristics in the studied hydrocyclone.

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A study of the fluid dynamic behaviour of filtering hydrocyclones

Cited by 54 publications

References 12 publications

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

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

Performance of hydrocyclones with different geometries

Performance of a New Geometry of Deoiling Hydrocyclones: Experiments and Numerical Simulations

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