A coupled computational fluid dynamics (CFD)/discrete element method (DEM) is used to simulate the gas–solid two-phase flow in a laboratory-scale spouted fluidized bed. Transient experimental results in the spouted fluidized bed are obtained in a special test rig using the high-speed imaging technique. The computational domain of the quasi-three-dimensional (3D) spouted fluidized bed is simulated using the commercial CFD flow solver ANSYS-fluent. Hydrodynamic flow field is computed by solving the incompressible continuity and Navier–Stokes equations, while the motion of the solid particles is modeled by the Newtonian equations of motion. Thus, an Eulerian–Lagrangian approach is used to couple the hydrodynamics with the particle dynamics. The bed height, bubble shape, and static pressure are compared between the simulation and the experiment. At the initial stage of fluidization, the simulation results are in a very good agreement with the experimental results; the bed height and the bubble shape are almost identical. However, the bubble diameter and the height of the bed are slightly smaller than in the experimental measurements near the stage of bubble breakup. The simulation results with their experimental validation demonstrate that the CFD/DEM coupled method can be successfully used to simulate the transient gas–solid flow behavior in a fluidized bed which is not possible to simulate accurately using the granular approach of purely Euler simulation. This work should help in gaining deeper insight into the spouted fluidized bed behavior to determine best practices for further modeling and design of the industrial scale fluidized beds.
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January 2018
Research-Article
Transient Computational Fluid Dynamics/Discrete Element Method Simulation of Gas–Solid Flow in a Spouted Bed and Its Validation by High-Speed Imaging Experiment
Ling Zhou,
Ling Zhou
Mem. ASME
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lingzhoo@hotmail.com
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lingzhoo@hotmail.com
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Lingjie Zhang,
Lingjie Zhang
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: zlj498@126.com
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: zlj498@126.com
Search for other works by this author on:
Weidong Shi,
Weidong Shi
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: wdshi@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: wdshi@ujs.edu.cn
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Ramesh Agarwal,
Ramesh Agarwal
Fellow ASME
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
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Wei Li
Wei Li
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lwjiangda@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lwjiangda@ujs.edu.cn
Search for other works by this author on:
Ling Zhou
Mem. ASME
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lingzhoo@hotmail.com
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lingzhoo@hotmail.com
Lingjie Zhang
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: zlj498@126.com
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: zlj498@126.com
Weidong Shi
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: wdshi@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: wdshi@ujs.edu.cn
Ramesh Agarwal
Fellow ASME
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
Department of Mechanical Engineering and
Materials Science,
Washington University in St. Louis,
St. Louis, MO 63130
e-mail: rka@wustl.edu
Wei Li
Research Center of Fluid Machinery
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lwjiangda@ujs.edu.cn
Engineering and Technology,
Jiangsu University,
Zhenjiang, Jiangsu 212013, China
e-mail: lwjiangda@ujs.edu.cn
1Corresponding author.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received December 27, 2016; final manuscript received August 6, 2017; published online September 12, 2017. Assoc. Editor: Reza Sheikhi.
J. Energy Resour. Technol. Jan 2018, 140(1): 012206 (9 pages)
Published Online: September 12, 2017
Article history
Received:
December 27, 2016
Revised:
August 6, 2017
Citation
Zhou, L., Zhang, L., Shi, W., Agarwal, R., and Li, W. (September 12, 2017). "Transient Computational Fluid Dynamics/Discrete Element Method Simulation of Gas–Solid Flow in a Spouted Bed and Its Validation by High-Speed Imaging Experiment." ASME. J. Energy Resour. Technol. January 2018; 140(1): 012206. https://doi.org/10.1115/1.4037685
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