Gas-Solid Erosion Study of Elbow Pipe based on Erosion Dynamic Grid Technology

Document Type : Regular Article


School of Mechanical Engineering &Rail Transit, Changzhou University, Changzhou, Jiangsu, 213164, China



The dynamic erosion characteristics of pipe bends exposed to gas-solid two-phase flow are investigated by using an erosion-coupled dynamic meshing method to elucidate the erosion failure phenomenon that is common in pipe elbows, transporting coal fly ash and subjected to particle erosion. The static mesh is compared with the erosion-coupled dynamic mesh method by CFD. The dynamic erosion characteristics of bends with different r/D ratios, D and r are investigated before and after surface deformation under gas-solid two-phase flow. The results lead to the following conclusions: Improved performance of the erosion-coupled dynamic mesh by taking full consideration of the coupling between the erosion-induced surface deformation and the particle motion under prolonged erosion. The erosion rate at the elbow changes significantly upon surface deformation, and the sites with a high risk of erosion shift downstream. With increasing of deformation, the larger the r/D ratio, the more obvious the concentration of erosion location evolving downstream. As D decreases, the high-risk erosion areas become more concentrated. In particular, the emergence of the “bending increase” phenomenon leads to a different perception of how r/D ratio and the diameter affect erosion in static-grid simulations: a larger r/D ratio of the elbow makes it more sensitive to surface deformation and increases the erosion rate. This study leads us to consider the coupled deformation of erosion in the context of erosion problems, which has important implications for predicting the service life of overflow components.


Adedeji, O. E. and C. A. R. Duarte (2020). Prediction of thickness loss in a standard 90° elbow using erosion-coupled dynamic mesh. Wear 460-461,203400.##
ANSYS, ANSYS 2021 R1 Theory Guide (2021). Technical Report. ANSYS Fluent Theory Guide, V. 21.1.##
Asgharpour, A. and P. Zahedi (2018). Experimental Investigation of Solid Particle Erosion in Successive Elbows in Gas Dominated Flows. ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting.##
Bilal, F. S., T. A. Sedrez and S. A. Shirazi (2021). Experimental and cfd investigations of 45 and 90 degrees bends and various elbow curvature radii effects on solid particle erosion. Wear, 203646.##
Bourgoyne, A. T. (1989). Experimental Study of Erosion in Diverter Systems Due to Sand Production. SPE/IADC Drilling Conference. Society of Petroleum Engineers.##
Darihaki, F. and J. Zhang (2021). The near-wall treatment for solid particle erosion calculations with CFD under gas and liquid flow conditions in elbows. Advanced Powder Technology 32(5), 1663-1676.##
Duarte, C. A. R. and F. Souza (2020). Dynamic mesh approaches for eroded shape predictions. Wear 484-485.##
Edwards, J. K., B. S. Mclaury and S. A. Shirazi (2001). Modeling solid particle erosion in elbows and plugged tees. Journal of Energy Resources Technology, 123(4), 277-284.##
Grant, G. and W. Tabakoff (1975). Erosion prediction in turbomachinery resulting from environmental solid particles. Journal of Aircraft. J. Aircr. 12(5), 471-478.##
Mazumder, Q. H., S.A. Shirazi and B. S. McLaury (2004). A mechanistic model to predict sand erosion in multiphaseflow in elbows downstream of vertical pipes, Corrosion 04662 (2004) 1-15.##
Mclaury, B. S. and S. A. Shirazi (2000). An Alternate Method to API RP 14E for Predicting Solids Erosion in Multiphase Flow. Journal of Energy Resources Technology 122(3), 115-122.##
Morsi, S. A. and A. J. Alexander (1972). An investigation of particle trajectories in two-phase flow systems. Journal of Fluid Mechanics Digital Archive (JFM), 55(2), 193-208.##
Oka, Y. I., K. Okamura and T. Yoshida (2005). Practical estimation of erosion damage caused by solid particle impact: Part 1: effects of impact parameters on a predictive equation. Wear 259 (1), 95-101.##
Oka, Y. I. and T. Yoshida (2005). Practical estimation of erosion damage caused by solid particle impact: Part 2: mechanical properties of materials directly associated with erosion damage. Wear 259 (1), 102-109.##
Parsi, M., A. Jatale, M. Agrawal and P. Sharma (2019). Effect of surface deformation on erosion prediction. Wear 431 57-66.##
Peng, W. S. and X. W. Cao (2016). Numerical prediction of erosion distributions and solid particle trajectories in elbows for gas-solid flow. Journal of Natural Gas Science and Engineering 30, 455-470.##
Peng, W. S. (2016). Study on the Solid Particle Erosion Mechanism of Pipe Bend for Multiphase Flow. Ph. D. thesis, China University of Petroleum, Qingdao, China.##
Shirazi, S. A., J. R. Shadley, B. S. McLaury and E. F. Rybicki (1995). A procedure to predict solid particle erosion in elbows and tees. Journal of Pressure Vessel Technology. 117 45-52.##
Sedrez, T. A. and S. A. Shirazi (2021, July). Erosion evaluation of elbows in series with different configurations. Wear,476, 203683.##
Sokmen, K. F. and O. B. Karatas (2020). Investigation of Air Flow Characteristics in Air Intake Hoses using CFD and Experimental Analysis based on Deformation of Rubber Hose Geometry. Journal of Applied Fluid Mechanics 13(3),871-880.##
Vieira, R. E. (2014). Sand erosion model improvement for elbows in gas production, multiphase annular and low-liquid flow. Dissertations & Theses - Gradworks. The University of Tulsa, Oklahoma, USA.##
Vieira, R. E., A. Mansour, B. S. Mclaury and S. A. Shirazi (2016). Experimental and computational study of erosion in elbows due to sand particles in air flow. Powder Technology 288, 339-353.##
Wang, Q.C., Q. Huang, X. Sun, J. Zhang and S. A. Shirazi (2020). Experimental and numerical evaluation of the effect of particle size on slurry erosion prediction. Journal of Energy Resources Technology, 143(7), 1-19.##
Wang, H.K., Y. Yu, J. Yu, Z. Wang and H. Li (2019). Development of erosion equation and numerical simulation methods with the consideration of applied stress. Tribology International, 137, 387-404.##
Xie, Z.Q., X. W. Cao, J. Zhang, F. Darihaki, S. Karimi and N. Xiong and L. Qigui (2021). Effect of cell size on erosion representation and recommended practices in cfd. Powder Technology. 389(9), 522-535.##
Xu, L. Y., F. Wu., Y. Yan., X. X. Ma and Z. Q. Hui and L. Wei (2021). Numerical simulation of air-solid erosion in elbow with novel arc-shaped diversion erosion-inhibiting plate structure. Powder Technology, 393, 670-680.##
Zamani, M., S. Seddighi and H. R. Nazif (2017). Erosion of natural gas elbows due to rotating particles in turbulent gas-solid flow. Journal of Natural Gas Science and Engineering, 40, 91-113.##
Zhang, J., H. Zhang, X. Chen and C. Y. Yu (2021). Gas-solid erosion wear characteristics of elbow pipe with corrosion defects. Journal of Pressure Vessel Technology, 143(5).##
Zhang, J, B. S. McLaury and S. A. Shirazi (2018). Application and experimental validation of a cfd based erosion prediction procedure for jet impingement geometry. Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear, 394-395, 11-19.##
Zolfagharnasab, M. H., M. Salimi, H. Zolfagharnasab, H. Alimoradi and C. Aghanajafi (2020). A novel numerical investigation of erosion wear over various 90-degree elbow duct sections. Powder Technology, 380(11), 1-3.##
Volume 15, Issue 6 - Serial Number 67
November and December 2022
Pages 1837-1850
  • Received: 01 May 2022
  • Revised: 25 July 2022
  • Accepted: 01 August 2022
  • Available online: 07 September 2022