CFD modeling of hydrocyclones: prediction of particle size segregation

Narasimha, M., Brennan, M. S. and Holtham, P. N. (2012) CFD modeling of hydrocyclones: prediction of particle size segregation. Minerals Engineering, 39 173-183. doi:10.1016/j.mineng.2012.05.010

Author Narasimha, M.
Brennan, M. S.
Holtham, P. N.
Title CFD modeling of hydrocyclones: prediction of particle size segregation
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2012-12
Sub-type Article (original research)
DOI 10.1016/j.mineng.2012.05.010
Volume 39
Start page 173
End page 183
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Abstract The flow behavior in a hydrocyclone is a highly swirling and turbulent multiphase structure. A multiphase CFD model with sub modules for the air-core, turbulence, and particle classification with a suitable slurry viscosity model was used to simulate performance of hydrocyclones. The predicted velocity field from the LES, DRSM turbulence models is compared with the LDA measurements data for a 75. mm cyclone. The multiphase CFD model is used to understand the particle size segregation inside a 6. in. hydrocyclone. The predictions are validated against the Renner (1976) data, which was originally measured using high-speed sampling probe at different precisely controlled positions. The overall classification curve predicts close to the experimental data. It is observed that the predicted position sample size distributions are in good agreement with the experimental data, at most of the cyclone sampling positions. Close to the forced vortex (inner position), the predicted size distributions slightly deviate from the measured data. The discrepancy may be an effect of sampling turbulence due to probing close to the unstable forced vortex. Simulations are also carried out using two different CFD models, with and without the viscosity correction due to the fines fraction. The predictions are improved with respect to Renner's data with the fines viscosity corrected CFD model.
Keyword Computational fluid dynamics
Multiphase flow
Particle separation
Sampling probe
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Official 2013 Collection
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Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
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Created: Thu, 11 Oct 2012, 14:22:52 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre