CFD simulation and experimental measurement of nickel solids concentration distribution in a stirred tank

Aoyi Ochieng, Maurice S. Onyango, H. K. Kiriamiti

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Solids suspension influences the quality of mixing and energy requirement in a solid-liquid system, both of which determine the efficiency of industrial processes such as nickel precipitation. Nickel solids concentration distribution in a stirred tank was investigated using computational fluid dynamics (CFD) and experimental methods. The concentration distribution of the nickel solids was compared with that of sand and glass. The laser Doppler velocimetry (LDV) method was used to measure the velocity field for the liquid-only system and an optical technique was employed to determine the axial solids concentration distribution. Regions of inhomogeneity in the tank were identified. It was found that, for a given solids loading, the solids concentration distribution depended on both particle size and particle size distribution. High solids loadings were investigated and a difference in the concentration distribution pattern was obtained with nickel, flint glass and sand particles. The CFD simulation results highlighted problems that could be associated with some conventional experimental methods of determining solids concentration distribution in a stirred tank.
Original languageEnglish
Pages (from-to)213-218
Number of pages6
JournalJournal of the Southern African Institute of Mining and Metallurgy
Volume110
Issue number5
Publication statusPublished - 2010

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computational fluid dynamics
Nickel
nickel
Computational fluid dynamics
Computer simulation
simulation
Sand
glass
particle size
distribution
Glass
flint
liquid
sand
Liquids
Particle size analysis
inhomogeneity
Velocity measurement
Suspensions
laser

Cite this

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title = "CFD simulation and experimental measurement of nickel solids concentration distribution in a stirred tank",
abstract = "Solids suspension influences the quality of mixing and energy requirement in a solid-liquid system, both of which determine the efficiency of industrial processes such as nickel precipitation. Nickel solids concentration distribution in a stirred tank was investigated using computational fluid dynamics (CFD) and experimental methods. The concentration distribution of the nickel solids was compared with that of sand and glass. The laser Doppler velocimetry (LDV) method was used to measure the velocity field for the liquid-only system and an optical technique was employed to determine the axial solids concentration distribution. Regions of inhomogeneity in the tank were identified. It was found that, for a given solids loading, the solids concentration distribution depended on both particle size and particle size distribution. High solids loadings were investigated and a difference in the concentration distribution pattern was obtained with nickel, flint glass and sand particles. The CFD simulation results highlighted problems that could be associated with some conventional experimental methods of determining solids concentration distribution in a stirred tank.",
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CFD simulation and experimental measurement of nickel solids concentration distribution in a stirred tank. / Ochieng, Aoyi; Onyango, Maurice S.; Kiriamiti, H. K.

In: Journal of the Southern African Institute of Mining and Metallurgy, Vol. 110, No. 5, 2010, p. 213-218.

Research output: Contribution to journalArticle

TY - JOUR

T1 - CFD simulation and experimental measurement of nickel solids concentration distribution in a stirred tank

AU - Ochieng, Aoyi

AU - Onyango, Maurice S.

AU - Kiriamiti, H. K.

PY - 2010

Y1 - 2010

N2 - Solids suspension influences the quality of mixing and energy requirement in a solid-liquid system, both of which determine the efficiency of industrial processes such as nickel precipitation. Nickel solids concentration distribution in a stirred tank was investigated using computational fluid dynamics (CFD) and experimental methods. The concentration distribution of the nickel solids was compared with that of sand and glass. The laser Doppler velocimetry (LDV) method was used to measure the velocity field for the liquid-only system and an optical technique was employed to determine the axial solids concentration distribution. Regions of inhomogeneity in the tank were identified. It was found that, for a given solids loading, the solids concentration distribution depended on both particle size and particle size distribution. High solids loadings were investigated and a difference in the concentration distribution pattern was obtained with nickel, flint glass and sand particles. The CFD simulation results highlighted problems that could be associated with some conventional experimental methods of determining solids concentration distribution in a stirred tank.

AB - Solids suspension influences the quality of mixing and energy requirement in a solid-liquid system, both of which determine the efficiency of industrial processes such as nickel precipitation. Nickel solids concentration distribution in a stirred tank was investigated using computational fluid dynamics (CFD) and experimental methods. The concentration distribution of the nickel solids was compared with that of sand and glass. The laser Doppler velocimetry (LDV) method was used to measure the velocity field for the liquid-only system and an optical technique was employed to determine the axial solids concentration distribution. Regions of inhomogeneity in the tank were identified. It was found that, for a given solids loading, the solids concentration distribution depended on both particle size and particle size distribution. High solids loadings were investigated and a difference in the concentration distribution pattern was obtained with nickel, flint glass and sand particles. The CFD simulation results highlighted problems that could be associated with some conventional experimental methods of determining solids concentration distribution in a stirred tank.

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EP - 218

JO - Journal of the Southern African Institute of Mining and Metallurgy

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