Study on the Impact Wear Characteristics of Catalyst Particles at 90° Elbow via CFD-DEM Coupling Method

Document Type : Regular Article


1 Institute of Flow-Induced Corrosion, Zhejiang Sci-Tech University, Hangzhou, Zhejiang, 310018, China

2 Hangzhou Special Equipment Inspection and Research Institute, Hangzhou 310051, China


In the process of petrochemical production, the catalyst particles in the hydraulic conveying pipeline often cause wear failure accidents due to collisions with wall. Compared with spherical particles, non-spherical particles’ trajectory would be different due to its geometric shape, and thereby affecting the flow wear characteristics. In this paper, the shape of catalyst particle model with real aspect ratio was constructed by using multi-cluster method, and a CFD-DEM coupling method was adopted by considering the interaction between particle-particle and particle-wall. The study focuses on the effect of particle shape, radius of curvature and angle of bend in terms of the wear characteristics of liquid-solid two-phase flow. The results indicate that with the increase of the particle aspect ratio, the wear rate and the impact density of particles decrease while the impact velocity increases, the wear area of the elbow mainly distributes in the middle part of the outer wall, and its maximum position appears between 78° and 90° in polar coordinates; With the increase of pipe’s curvature radius, the main wear area changes due to the direct collision and the sliding friction of the particles along the pipe wall, and its maximum wear rate shows a downward trend due to the reinforce of buffering effect; With the decrease of bending angle, The main wear area decrease because of the changes in particle flow patterns and it is mainly located in the center of the outer wall.


Adedeji, O. E., W. Yu and R. S. Sanders (2019). Analysis of local wear variables for high-precision erosion modeling in complex geometries. Wear 426, 562-569.##
Anna, K., B. V. Balakin and P. Kosinski (2020).Theoretical analysis of erosion in elbows due to flows with nano- and micro-size particless. Powder Technology 333, 47-59.##
Archard, J. F. (2004). Contact and Rubbing of Flat Surfaces. Journal of Applied Physics 24(8), 981-988.##
Chen, G., Y. Liu and G. Lodewijks (2017). Experimental research on the determination of the coefficient of sliding wear under iron ore handling conditions. Tribology in Industry 39(3), 378-390.##
Christopher B. Solnordal and Y. Chong (2015). An experimental and numerical analysis of erosion caused by sand pneumatically conveyed through a standard pipe elbow. Wear 336, 43-57.##
Duarte, C., F. Souza and R. Salvo (2016). The role of inter-particle collisions on elbow erosion. International Journal of Multiphase Flow 89, 1-22.##
Huang, S., J. Huang and J. Guo (2019). Study on Wear Properties of the Flow Parts in a Centrifugal Pump Based on EDEM–Fluent Coupling. Processes 7(7), 431.##
Januário, J. R. and C. B. Maia (2020). CFD-DEM Simulation to Predict the Critical Velocity of Slurry Flows. Journal of Applied Fluid Mechanics 13(1), 161-168.##
Kang, R. and H. Liu (2020). An integrated model of predicting sand erosion in elbows for multiphase flows. Powder Technology 366.##
Li, Y., H. Zhang and Z. Lin (2019). Relationship between wear formation and large-particle motion in a pipe bend. Royal Society Open Science 6(1) 181254.##
Liu, X., W. Zhong and A. Yu (2016). Mixing behaviors in an industrial-scale spout-fluid mixer by 3D CFD-TFM. Powder Technology 314,455-465.##
Ma, H., L. Xu and Y. Zhao (2017). CFD-DEM simulation of fluidization of rod-like particles in a fluidized bed. Powder Technol 314, 355-366.##
Nan, L. and H. Lan (2015). Effect of the gas–solid two-phase flow velocity on elbow erosion. Journal of Natural Gas Science and Engineering 26, 581-586.##
Nan, W., Y. Wang and J. Wang (2016). Numerical analysis on the fluidization dynamics of rod like particles. Adv Powder Technol 27(5), 2265-2276.##
Ou, G., K. Bie and Z. Zheng (2018). Numerical simulation on the erosion wear of a multiphase flow pipeline. International Journal of Advanced Manufacturing Technology 96(5-8), 1705-1713.##
Parsi, M., K. Najmi and F. Najafifard (2014). Acomprehensive review of solid particleerosion modeling for oil and gas wells and pipelines applications. Journal of Natural Gas Science and Engineering 21, 850-873.##
Pei, J., A. Lui and Q. Zhang (2018). Numerical investigation of the maximum erosion zone in elbows for liquid-particle flow. Powder Technology 333, 47-59.##
Ren, B., W. Zhong, and Y. Chen (2012). CFD-DEM simulation of spouting of corn-shaped particles. Particuology 10(5), 562-572.##
Sedrez, T. A., S. A. Shirazi and Y. R. Rajkumar (2019). Experiments and CFD simulations of erosion of a 90° elbow in liquid-dominated liquid-solid and dispersed-bubble-solid flows. Wear 426, 570-580.##
Singh, V., S. Kumar and S. K. Mohapatra (2019). Modeling of Erosion Wear of Sand Water Slurry Flow through Pipe Bend using CFD. Journal of Applied Fluid Mechanics 12(3), 679-687.##
Vieira, R. E., A. Mansouri and B. S. Mclaury (2016). Experimental and computational study of erosion in elbows due to sand particles in air flow. Powder Technology 288, 339-353.##
Yin, J., Q. Y. Chen, R. Zhu and W. X. Tang (2020). Enhancement of Liquid-Solid Two-Phase Flow Through a Vertical Swirling Pipe. Journal of Applied Fluid Mechanics 13(5), 1501-1513.##
Zeng, D. Z. and E. B. Zhang (2018). Investigation of erosion behaviors of sulfur-particle-laden gas flow in an elbow via a CFD-DEM coupling method. Powder Technology 329, 115-128.##
Zhang, R.,H. Li and S. Dong (2019). Approximate theoretical solution of the movement and erosion of solid particles in a 90°bend. Wear 430-432.##
Zhong, W. Q., Y. Zhang and B. S. Jin (2009). Discrete Element Method simulation of cylinder-shaped particle flow in a gas- solid fuidized bed. Chemical Engineering & Technology 32(3), 386-391.##
Zhou, J. W., Y. Liu and S. Y. Liu (2017). Effects of particle shape and swirling intensity on elbow erosion in dilute-phase pneumatic conveying. Wear 380-381, 66-77.##
Zolfagharnasab, M. H. and M. Salimi (2020). A novel numerical investigation of erosion wear over various 90-degree elbow duct sections. Powder Technology 380, 1-3.##
Volume 15, Issue 1 - Serial Number 63
January and February 2022
Pages 221-230
  • Received: 05 January 2021
  • Revised: 01 August 2021
  • Accepted: 06 August 2021
  • Available online: 14 November 2021