Distribution characteristics and convergence of particles in converging-diverging tube

被引：0
|
作者：
Peng D. [1 ]
Feng Y. [1 ]
Wang Y. [1 ]
Tan Z. [1 ]
Yu T. [2 ]
Wu S. [1 ]
机构：
[1] School of Mechanical Engineering, Xiangtan University, Hunan, Xiangtan
[2] School of Mechanical Engineering, Hunan University of Technology, Hunan, Zhuzhou
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 09期
关键词：
CFD-DEM; concentration distribution; converging-diverging tube; particle convergence; particle image velocimetry (PIV); two-phase flow;
D O I：
10.16085/j.issn.1000-6613.2021-2431
中图分类号：
学科分类号：
摘要：
In order to analyze the motion laws of particle swarm in vertical converging-diverging tube, the effects of converging-diverging ratio γ, rib height e and particle inlet concentration α on the concentration distribution and convergence characteristics of particle swarm in vertical converging-diverging tube were simulated by the coupled CFD-DEM method. The results showed that the axial concentration of the particle group was relatively uniform, and more particles were retained in the downer part of the tube within the research parameters. The relative concentration of particles in the radial direction followed the rule of low concentration in the center of the tube and high concentration near the wall. When the inlet concentration of particles α≤2%, the particle concentration near the pipe wall was high in the scaler with rib height e=1.0mm. In the relatively stable stage of particle movement in the middle and upper part of the pipe section, when rib height e=2.0mm, scaling ratio γ≤1.0 and particle inlet concentration α≥3%, particle swarm were more likely to convergence. © 2022 Chemical Industry Press. All rights reserved.
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页码：4662 / 4672
页数：10
相关论文
共 32 条
  • [1] EHSANI M, MOVAHEDIRAD S, SHAHHOSSEINI S., The effect of particle properties on the heat transfer characteristics of a liquid-solid fluidized bed heat exchanger, International Journal of Thermal Sciences, 102, pp. 111-121, (2016)
  • [2] SUN Li, ZHANG Nan, LIU Xinhua, Et al., Effect of boundary conditions on particle-fluid convection heat transfer, The Chinese Journal of Process Engineering, 19, 6, pp. 1075-1084, (2019)
  • [3] IMAI T, MURAYAMA T, ONO Y., The estimation of convective heat transfer coefficients between a spherical particle and fluid at lower Reynolds number, ISIJ International, 35, 12, pp. 1438-1443, (1995)
  • [4] IMAI T, MURAYAMA T, ONO Y., The effect of structure of packed beds on the convective heat transfer coefficient between particle and liquid, ISIJ International, 34, 10, pp. 777-783, (1994)
  • [5] STROM H, SASIC S., Detailed simulations of the effect of particle deformation and particle-fluid heat transfer on particle-particle interactions in liquids, Procedia Engineering, 102, pp. 1563-1572, (2015)
  • [6] MELLER Y, LIBERZON A., Particle-fluid interaction forces as the source of acceleration PDF invariance in particle size, International Journal of Multiphase Flow, 76, pp. 22-31, (2015)
  • [7] SHOKRI R, GHAEMI S, NOBES D S, Et al., Investigation of particle-laden turbulent pipe flow at high-Reynolds-number using particle image/tracking velocimetry (PIV/PTV), International Journal of Multiphase Flow, 89, pp. 136-149, (2017)
  • [8] WANG Bingjie, LI Hui, YANG Xiaoyong, Et al., Application process of CFD-numerical simulation technology for multiphase flow characteristics study in droplet-microfluidic systems, Chemical Industry and Engineering Progress, 40, 4, pp. 1715-1735, (2021)
  • [9] CHAVAN P V, THOMBARE M A, BANKAR S B, Et al., Novel multistage solid-liquid circulating fluidized bed: hydrodynamic characteristics, Particuology, 38, pp. 134-142, (2018)
  • [10] JIANG Feng, ZHAO Pengli, QI Guopeng, Et al., Flow characteristics in a horizontal liquid-solid circulating fluidized bed, Powder Technology, 342, pp. 24-35, (2019)
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