Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach

doi:10.1016/S1004-9541(13)60580-7

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (10): 1069-1081.DOI: 10.1016/S1004-9541(13)60580-7

• 流体力学与传递现象 • 下一篇

Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach

邵婷, 胡银玉, 王文坦, 金涌, 程易

Key Laboratory of Green Chemical Reaction Engineering & Technology of Beijing, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2012-05-22 修回日期:2013-02-28 出版日期:2013-10-28 发布日期:2013-10-29
通讯作者: CHENG Yi
基金资助:
Supported by the State Key Development Program for Basic Research of China (2013CB733600), the National Natural Science Foundation of China (21036003, 20776074) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (20090002110069).

Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach

SHAO Ting, HU Yinyu, WANG Wentan, JIN Yong, CHENG Yi

Key Laboratory of Green Chemical Reaction Engineering & Technology of Beijing, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2012-05-22 Revised:2013-02-28 Online:2013-10-28 Published:2013-10-29
Contact: CHENG Yi
Supported by:
Supported by the State Key Development Program for Basic Research of China (2013CB733600), the National Natural Science Foundation of China (21036003, 20776074) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (20090002110069).

摘要/Abstract

摘要： Computational fluid dynamics-discrete element method (CFD-DEM) coupled approach was employed to simulate the solid suspension behavior in a Rushton stirred tank with consideration of transitional and rotational motions of millions of particles with complex interactions with liquid and the rotating impeller. The simulations were satisfactorily validated with experimental data in literature in terms of measured particle velocities in the tank. Influences of operating conditions and physical properties of particles (i.e., particle diameter and density) on the two-phase flow field in the stirred tank involving particle distribution, particle velocity and vortex were studied. The wide distribution of particle angular velocity ranging from 0 to 10⁵ r·min^-1 is revealed. The Magnus force is comparable to the drag force during the particle movement in the tank. The strong particle rotation will generate extra shear force on the particles so that the particle morphology may be affected, especially in the bio-/polymer-product related processes. It can be concluded that the CFD-DEM coupled approach provides a theoretical way to understand the physics of particle movement in micro- to macro-scales in the solid suspension of a stirred tank.

关键词: stirred tank, solid suspension, particle rotation, computational fluid dynamics, discrete element method

Abstract: Computational fluid dynamics-discrete element method (CFD-DEM) coupled approach was employed to simulate the solid suspension behavior in a Rushton stirred tank with consideration of transitional and rotational motions of millions of particles with complex interactions with liquid and the rotating impeller. The simulations were satisfactorily validated with experimental data in literature in terms of measured particle velocities in the tank. Influences of operating conditions and physical properties of particles (i.e., particle diameter and density) on the two-phase flow field in the stirred tank involving particle distribution, particle velocity and vortex were studied. The wide distribution of particle angular velocity ranging from 0 to 10⁵ r·min^-1 is revealed. The Magnus force is comparable to the drag force during the particle movement in the tank. The strong particle rotation will generate extra shear force on the particles so that the particle morphology may be affected, especially in the bio-/polymer-product related processes. It can be concluded that the CFD-DEM coupled approach provides a theoretical way to understand the physics of particle movement in micro- to macro-scales in the solid suspension of a stirred tank.

Key words: stirred tank, solid suspension, particle rotation, computational fluid dynamics, discrete element method

邵婷, 胡银玉, 王文坦, 金涌, 程易. Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach[J]. Chinese Journal of Chemical Engineering, 2013, 21(10): 1069-1081.

SHAO Ting, HU Yinyu, WANG Wentan, JIN Yong, CHENG Yi. Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach[J]. Chin.J.Chem.Eng., 2013, 21(10): 1069-1081.

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Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach

Simulation of Solid Suspension in a Stirred Tank Using CFD-DEM Coupled Approach

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