On the Agitation Characteristic Curve of Medium Light Particles in a Stirred Tank Based on CFD Simulation

Zeng Liu; Meng Li; Wentao Xu; Degang Ouyang; Minghui Li; Zhishan Li; De Xie; Jianglong Sun

doi:10.1252/jcej.17we140

Transport Phenomena and Fluid Engineering

On the Agitation Characteristic Curve of Medium Light Particles in a Stirred Tank Based on CFD Simulation

Zeng Liu, Meng Li, Wentao Xu, Degang Ouyang, Minghui Li, Zhishan Li, De Xie, Jianglong Sun

Author information

Zeng Liu
Department of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology
Hubei Key Laboratory of Naval Architecture and Ocean Engineering, Hydrodynamics, Huazhong University of Science and Technology
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration
Meng Li
Department of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology
Wentao Xu
Department of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology
Degang Ouyang
Research and Development Centre of Wuhan Iron and Steel Co., Ltd.
Minghui Li
Research and Development Centre of Wuhan Iron and Steel Co., Ltd.
Zhishan Li
Department of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology
De Xie
Department of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology
Hubei Key Laboratory of Naval Architecture and Ocean Engineering, Hydrodynamics, Huazhong University of Science and Technology
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration
Jianglong Sun Corresponding author
Department of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology
Hubei Key Laboratory of Naval Architecture and Ocean Engineering, Hydrodynamics, Huazhong University of Science and Technology
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration

Keywords: Solid–Liquid Mixing, Light Particles, Particles Dispersion, Eulerian–Lagrangian Approach

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2018 Volume 51 Issue 7 Pages 556-565

DOI https://doi.org/10.1252/jcej.17we140

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Abstract

In this paper, the agitation characteristic curve of medium light particles in stirred tank is proposed based on numerical simulation study. The agitation characteristic curve contains the power number curve as the input of the stirring system and the particle dispersion curve as the output. The standard k–ε turbulence model together with the volume of fluid model (VOF) and the discrete phase model (DPM) were used to simulate the particle distribution in an unbaffled tank with free surfaces. Based on the standard deviation, dispersion degree curves in both axial and radial directions (σ_la and σ_lr) were proposed to quantify the discrete particle distribution in the tank. Compared with the instantaneous fluid field, the dispersion degree curves represent well the particle distribution for different rotation speeds and immergences. Besides, the power number (N_p) was used to quantify the power consumed during the drawdown process of floating particles. This work shows that the agitation characteristic curve would serve as a benchmark so that stirring systems with different configurations could be compared and optimized.

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