Vakamalla, T R and Mangadody, Narasimha
(2015)
DENSE SLURRY CFD MODEL FOR HYDROCYCLONE PERFORMANCE
EVALUATION INCORPORATING RHEOLOGY, PARTICLE DRAG AND LIFT
FORCES.
In: Eleventh International Conference on CFD in the Minerals and Process Industries, 7-9 December 2015, Melbourne, Australia.
Abstract
Common applications of hydrocyclones include classification, thickening, de-sliming and de-gritting. In all the operations cyclone separators usually operate under high solid loading conditions. Computational Fluid Dynamic (CFD) models developed so far are unable to predict the behavior at high percentage of solids. Therefore, present paper is aimed to develop the CFD model corrected with suitable rheological model, particle drag and lift forces to account particle fluid interactions at high solid volume fractions. Turbulence is resolved using large eddy simulation. Drag is corrected with solids loading; rheology is modelled using Newtonian model corrected with fines. CFD predicted two-phase water split and air-core data is validated against Electrical Resistance Tomography and High Speed Video camera measured data. The influence of feed solids on the air core size also investigated. Multiphase simulations ran with 0-50% feed solid loadings are analyzed and validated in terms of cut size and efficiency. Modified CFD model is able to predict the experimental data with reasonable accuracy. Additional validation in terms of cut size in 250 mm Krebs cyclone (Devulapalli, 1997) is also provided in comparison with discrete phase model and standard mixture model.
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