Journal of South China University of Technology(Natural Science) >

2025 , Vol. 53 >Issue 5: 130 - 138

DOI: https://doi.org/10.12141/j.issn.1000-565X.240222

Energy, Power & Electrical Engineering

Motion Distribution Characteristics of Regular Tetrahedral Particle Population in Vertical Uppipe

  • PENG Deqi ,
  • ZHOU Jingqiang ,
  • FENG Yuan ,
  • HUANG Zhizhong ,
  • TAN Zhuowei ,
  • TANG Mingcheng ,
  • PENG Jianguo ,
  • CHEN Ying
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  • 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
彭德其（1972—），男，博士，教授，主要从事过程强化与节能环保研究。E-mail： pengshuaike@163.com

Received date: 2024-05-07

  Online published: 2024-09-02

Supported by

the Natural Science Foundation of Hunan Province(2024JJ7546)

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Abstract

Liquid-solid two-phase flow technology is widely applied to the heat transfer enhancement in heat exchanger design, the key lies in guiding low-volume-fraction particles to the wall region to disrupt the thermal boundary layer and thereby improve the heat transfer efficiency. The movement behavior of particles is a key factor for deep analysis of heat transfer enhancement mechanism. Non-spherical particles have better disturbance effects and more complex movement behaviors due to the anisotropy of their shapes. This paper takes regular tetrahedral particle groups as the research subject to analyze their motion and distribution law in liquid-solid two-phase flow in vertical uppipe. In the investigation, the effects of particle inlet volume fraction (1%, 2%, 3%, 4% and 5%) and liquid inlet velocity (1.0, 1.2, 1.5, 1.8 and 2.0 m/s) on the average velocity and relative volume fraction distribution of particle groups in tubes are simulated based on CFD-DEM (Computational Fluid Dynamics-Discrete Element Model) coupling method, and the accuracy of the numerical simulation is verified by PIV (Particle Image Veloci-metry) experiments. The results show that, within the studied parameter range, the average velocity of particle groups exhibits axial fluctuations, with a fluctuation amplitude intensifying as the liquid inlet velocity increases, and decreases radially from the pipe center to the wall. Furthermore, the velocity distribution becomes increasingly centralized as the fluid flow develops axially. Along the radial direction, the relative volume fraction of particles follows the double peak law, that is, being higher in the central area and near the wall of the tube, while being lower in the transition area. When the particle inlet volume fraction is 1% and the liquid inlet velocity is 2.0 m/s, the particle volume fraction near the pipe wall is the highest.

Key words： liquid-solid two-phase flow; regular tetrahedral particle; motion characteristic; velocity distribution; volume fraction distribution

Cite this article

PENG Deqi , ZHOU Jingqiang , FENG Yuan , HUANG Zhizhong , TAN Zhuowei , TANG Mingcheng , PENG Jianguo , CHEN Ying . Motion Distribution Characteristics of Regular Tetrahedral Particle Population in Vertical Uppipe[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(5) : 130 -138 . DOI: 10.12141/j.issn.1000-565X.240222

References

1 孙丽，张楠，刘新华，等 ．边界条件对颗粒-流体对流传热的影响［J］．过程工程学报，2019，19（6）：1075-1084．
  SUN Li， ZHANG Nan， LIU Xinhua，et al ．Effect of boundary conditions on particle-fluid convection heat transfer［J］．The Chinese Journal of Process Engineering，2019，19（6）：1075-1084．
2 QI G， JIANG F， CHEN F ．Numerical investigation on heat transfer of liquid-solid two-phase flow in vertical multi-tube circulating fluidized bed heat exchanger［J］．Powder Technology，2023，427：118752/1-16．
3 EHSANI M， MOVAHEDIRAD S， SHAHHOSSEINI S ．The effect of particle properties on the heat transfer cha-racteristics of a liquid-solid fluidized bed heat exchanger［J］．International Journal of Thermal Sciences，2016，102：111-121．
4 JIANG F， WANG H， LIU Y，et al ．Effect of particle collision behavior on heat transfer performance in a down-flow circulating fluidized bed evaporator［J］．Powder Technology，2020，381：55-67．
5 STR?M H， SASIC S ．Detailed simulations of the effect of particle deformation and particle-fluid heat transfer on particle-particle interactions in liquids［J］．Procedia Engineering，2015，102：1563-1572．
6 MELLER Y， LIBERZON A ．Particle-fluid interaction forces as the source of acceleration PDF invariance in particle size［J］．International Journal of Multiphase Flow，2015，76：22-31．
7 JIANG F， YAN S， QI G，et al ．Particle distribution and pressure drop in a horizontal two-pass liquid-solid circulating fluidized bed heat exchanger［J］．Powder Technology，2023，416：118210/1-16．
8 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）［J］．International Journal of Multiphase Flow，2017，89：136-149．
9 HAO M， ZHANG Y， HUANG Y，et al ．Effect of particle self-rotation on separation efficiency in mini-hydrocyclones［J］．Powder Technology，2022，399：117165/1-11．
10 SUN J， GAO T， FAN Y，et al ．The modulation of particles on coherent structure of turbulent boundary layer in dilute liquid-solid two-phase flow with PIV［J］．Powder Technology，2019，344：883-896．
11 AKSHAYVEER， SHINDE V M ．CFD-DEM analysis of particle polydispersity on the performance of fluidised bed reactor during silane pyrolysis［J］．Particuology，2024，91：72-87．
12 ZHANG H， WANG Y， LI C，et al ．Pulsation effects on mixing behaviour of binary particles with different densities in supercritical water fluidized bed reactors： a CFD-DEM study［J］．Powder Technology，2024，433：119259/1-14．
13 LV K， MIN F， ZHU J，et al ．Experiments and CFD-DEM simulations of fine kaolinite particle sedimentation dynamic characteristics in a water environment［J］．Powder Technology，2020，382：60-69．
14 XU B L， LIN Z， ZHU Z，et al ．Experimental and simulation study of the effect of gravity on the solid-liquid two-phase flow and erosion of ball valve［J］．Advanced Powder Technology，2022，33（2）：103416/1-14．
15 LIU G， YU F， LU H，et al ．CFD-DEM simulation of liquid-solid fluidized bed with dynamic restitution coefficient［J］．Powder Technology，2016．304：186-197．
16 D’AVINO G ．Numerical simulations on the settling dynamics of an ellipsoidal particle in a viscoelastic fluid［J］．Journal of Non-Newtonian Fluid Mechanics，2022．310：104947/1-12．
17 HU R， LIU Y， RAVNIK J，et al ．A hybrid analytical-numerical model for calculating the maximum elastic force acting on a flow-driven elastic prolate spheroidal particle during its collision with a rigid wall［J］．Computational Mechanics，2022．Doi： 10.1007/s00466-021-02127-w．
18 LIU X， ZHOU J， GAO S，et al ．Study on the impact wear characteristics of catalyst particles at 90 degrees elbow via CFD-DEM coupling method［J］．Journal of Applied Fluid Mechanics，2022，15（1）：221-230．
19 KRUGGEL-EMDEN H， RICKELT S， WIRTZ S，et al ．A study on the validity of the multi-sphere discrete element method［J］．Powder Technology，2008，188（2）：153-165．
20 彭德其，冯源，王依然，等 ．立式缩放管内液固颗粒群浓度分布与汇聚特性［J］．化工进展，2022，41（9）：4662-4672．
  PENG Deqi， FENG Yuan， WANG Yiran，et al ．Distribution characteristics and convergence of particles in converging-diverging tube［J］．China Powder Science and Technology，2022，41（9）：4662-4672．
21 GAN J， YU A， ZHOU Z ．DEM simulation on the packing of fine ellipsoids［J］．Chemical Engineering Science，2016，156（30）：64-76．
22 GAN J， ZHOU Z， YU A ．Structure analysis on the packing of ellipsoids under one-dimensional vibration and periodic boundary conditions［J］．Powder Technology，2018，335（10）：327-333．
23 LIU G， Wang P， WANG S，et al ．Numerical simulation of flow behavior of liquid and particles in liquid-solid risers with multi scale interfacial drag method［J］．Powder Technology，2013，24 （2）：537-548．
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