Journal of South China University of Technology(Natural Science Edition) ›› 2025, Vol. 53 ›› Issue (5): 130-138.doi: 10.12141/j.issn.1000-565X.240222

• Energy, Power & Electrical Engineering • Previous Articles    

Study on the Motion Distribution Characteristics of Regular Tetrahedral Particles in Vertical Uppipe

PENG Deqi1  ZHOU Jingqiang1  FENG  Yuan1  HUANG Zhizhong2  TAN Zhuowei1  TANG Mingcheng3  PENG Jianguo3  CHEN Ying 1   

  1. 1.School of Mechanical Engineering and mechanics, Xiangtan University, Xiangtan 411105, Hunan, China;

    2.Xiangtan General Centrifuge Co. Ltd., Xiangtan 411200, Hunan, China;

    3.Zhuzhou Hongda Polymer Materials Co., Ltd., Zhuzhou 412007, Hunan, China


  • Online:2025-05-25 Published:2024-09-06

Abstract:

In order to analyze the motion and distribution law of tetrahedral particle groups in liquid-solid two-phase flow in vertical uppipe, the effects of particle inlet concentration α(1%、2%、3%、4%、5%) and liquid inlet velocity u(1.0、1.2、1.5、1.8、2.0m/s) on the velocity and relative concentration distribution of particle groups in tubes were simulated based on CFD-DEM coupling method, and the accuracy of the numerical simulation is verified by PIV experiments. The results show that the particle group velocity fluctuates along the axial direction and decreases along the radial direction from the center to the wall of the tube within the range of research parameters. Along the radial direction, the relative concentration of particles follows the double peak law. Higher relative concentration of particles in the center of the tube and near the wall, while lower concentration in the transition region. When the particle inlet concentration is 1% and the liquid inlet flow rate is 2.0m/s, the particle concentration near the pipe wall is the highest.

Key words: liquid-solid two-phase flow, tetrahedral particles, motion characteristics, velocity distribution, concentration distribution