CFD Modelling of Spiral Concentrator- Prediction of Comprehensive Fluid Flow Field and Particle Segregation

Sudikondala, P. and Mangadody, Narasimha and Kumar, M and et al, . (2022) CFD Modelling of Spiral Concentrator- Prediction of Comprehensive Fluid Flow Field and Particle Segregation. Minerals Engineering, 183. pp. 1-18. ISSN 0892-6875

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Abstract

A comprehensive numerical analysis of the fluid flow and dilute particulate flow in the LD9 spiral separator is presented in this work. The air–water flow field on a coal spiral is simulated using the volume of fluid (VOF) coupled with RANS turbulence models. Water depth and flow field predictions by RSM show close agreement with experiments. Stability depth, turbulence intensity was analyzed for entire liquid depths. The discrete phase model is used to model the dilute particulates at different flow rates. Turbulent dispersion of particles using dispersion index and Bagnold force analysis indicate that centrifugal force dominates the separation at increased particle size and water depth level, whereas the fines are significantly affected by turbulence dispersion at the outer trough region. The magnitude of the Bagnold to gravitational force increases from the inner to outer trough region and a dip at the outer edge region due to inherent change of shear rate. Coarse particles experience higher lift than the fines and migrate to the top flowing layers. © 2022 Elsevier Ltd

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IITH Creators:

IITH Creators	ORCiD
Mangadody, Narasimha	http://orcid.org/0000-0002-3123-2811

Item Type:

Article

Additional Information:

The authors would like to acknowledge IIT Hyderabad, the man- agement of R&D TATA Steel and Uttatchhar Aviskar Yojana (UAY)- MHRD, Govt. of India for sponsoring this project (IITH_008, phase II) and for the encouragement of the joint research on CFD modelling studies related to spiral concentrator treating chromite ore fines

Uncontrolled Keywords:

Bagnold Forces, DPM model, Residence time distribution, Segregation, Spiral concentrator, Turbulence

Subjects:

Chemical Engineering

Divisions:

Department of Chemical Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Jun 2022 05:36

Last Modified:

28 Jun 2022 05:17