JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2015, Vol. 45 ›› Issue (2): 62-66.doi: 10.6040/j.issn.1672-3961.0.2014.235

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CFD-DEM simulation of bubbling and particle mixing properties in pulsed jet fluidized bed

REN Libo1,2, SHANG Libao2, YAN Rixiong3, HE Hailan2, ZHAO Hongxia1, HAN Jitian1   

  1. 1. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Shanghai Heat Transfer Equipment Limited Company, Shanghai 201508, China;
    3. China Huanqiu Contracting & Engineering Corporation, Beijing 100012, China
  • Received:2014-08-26 Revised:2015-01-04 Online:2015-04-20 Published:2014-08-26

Abstract: Based on the MPI (Message Passing Interface) platform of FLUENT software, the parallel simulation technique for pseudo three-dimension computational fluid dynamics-discrete element method (CFD-DEM) coupling model was developed through the user-defined functions (UDFs). Numerical simulation of the gas-solid flow in pulsed jet fluidized bed was conducted by the developed parallel CFD-DEM coupling model, and the bubbling properties for the gas phase and particle mixing properties were revealed. Simulation results showed that the developed parallel CFD-DEM coupling model could have good scalability and speeded-up performance with increase in the number of computing nodes. Small-scale vortices on both sides of the mainstream gradually evolved into two main vortices in the bubbling processes. The particle mixing only occurred in the jet-influenced region after a single bubble had passed through the bed. The simulation results accorded well with the related experimental and simulation results, which showed that this model could well simulate the bubbling and particle mixing properties in dense particulate flows, laying the foundation for the implementation of the model in massively cluster systems.

Key words: parallel computing, discrete element method, bubbling, computational fluid dynamics, particle mixing

CLC Number: 

  • TK121
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