CFD simulation of particle suspension in a stirred tank
Date
2013
Authors
Qi, N.
Zhang, H.
Zhang, K.
Xu, G.
Yang, Y.
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Journal article
Citation
Particuology: science and technology of particles, 2013; 11(3):317-326
Statement of Responsibility
Nana Qi, Hu Zhang, Kai Zhang, Gang Xu, Yongping Yang
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Abstract
Particle suspension characteristics are predicted computationally in a stirred tank driven by a Smith turbine. In order to verify the hydrodynamic model and numerical method, the predicted power number and flow pattern are compared with designed values and simulated results from the literature, respectively. The effects of particle density, particle diameter, liquid viscosity and initial solid loading on particle suspension behavior are investigated by using the Eulerian-Eulerian two-fluid model and the standard k-ε turbulence model. The results indicate that solid concentration distribution depends on the flow field in the stirred tank. Higher particle density or larger particle size results in less homogenous distribution of solid particles in the tank. Increasing initial solid loading has an adverse impact on the homogeneous suspension of solid particles in a low-viscosity liquid, whilst more uniform particle distribution is found in a high-viscosity liquid. © 2012 Published by Elsevier B.V.
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Copyright © 2012 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.