Numerical Analysis of the Changes in Dense Medium Feed Solids on Dense Medium Cyclone Performance

Mangadoddy, Narasimha, Brennan, M. S., Holtham, P. N. and Banerjee, P. K. (2007). Numerical Analysis of the Changes in Dense Medium Feed Solids on Dense Medium Cyclone Performance. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (1042-1049). 3-7 December, 2007.

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Author Mangadoddy, Narasimha
Brennan, M. S.
Holtham, P. N.
Banerjee, P. K.
Title of paper Numerical Analysis of the Changes in Dense Medium Feed Solids on Dense Medium Cyclone Performance
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Journal name Proceedings of the 16th Australasian Fluid Mechanics Conference, 16AFMC
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
Open Access Status File (Author Post-print)
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Start page 1042
End page 1049
Total pages 8
Collection year 2007
Language eng
Abstract/Summary Numerical simulations of changes in feed medium solids on dense medium cyclone performance were performed using a multi-phase mixture CFD (Computational Fluid Dynamics) model for medium and air-core coupled with Lagrangian model for coal particles for a 350mm DSM cyclone. The turbulence was resolved using Large Eddy Simulation (LES). The mixture model considered the interactions between water and solid phases in terms of hindered settling, lift and Bagnold forces at high feed medium solid loadings. The medium properties were modified by changing the particle size distribution and concentration. Three different medium sizes (ultrafine, superfine and fine) were used in the simulations. The effect of medium stability and rheology on DMC performance is related to feed medium size in terms of density differential and medium segregation. The simulations predicted low Ep (Ecort probability) values with finer medium which gives high separation efficiency on density. A reduction in cyclone efficiency observed for a given feed medium solids distribution at higher feed medium concentrations due to an increase in slurry viscosity
Subjects 290000 Engineering and Technology
Keyword multi-phase mixture CFD
Large Eddy Simulation
slurry viscosity
Q-Index Code E1

 
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Created: Fri, 21 Dec 2007, 11:02:55 EST by Bikash Das on behalf of Julius Kruttschnitt Mineral Research Centre