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An Implicit Approach for Numerical Simulation of Water Hammer Induced Pressure in a Straight Pipe

Author

Listed:
  • Mohammad Bostan

    (Razi University)

  • Amir Hossein Azimi

    (Lakehead University)

  • Ali Akbar Akhtari

    (Razi University)

  • Hossein Bonakdari

    (Université Laval)

Abstract

An accurate prediction of propagation speed and the magnitude induced pressure in water hammer is very critical for the analysis, design, and operation of pipeline transmissions. A new numerical scheme based on an implicit discretization of the method of characteristics solution (IMOC) was proposed in this study. The numerical results were compared with the experimental data and the explicitly discretized solution of the method of characteristics (MOC). Due to the transient nature of the problem, accurate estimation of the head loss can significantly alter the performance of numerical models. In this regards, the performance of both numerical models (i.e., MOC and IMOC) were tested. Four equations were employed based on the steady, quasi-steady, unsteady, and the simplified unsteady algorithms. An acceptable prediction of pressure head with a minimum relative error of −2% and a maximum error of 11% was achieved by using a quasi-steady algorithm for prediction of head loss term in the IMOC model whereas, the relative error of the MOC model was between −11% and +30%. The IMOC model in combination with the simplified unsteady algorithm for estimation of the head loss term had an error range between −20% and +2%, whereas the error range of the MOC model was between −35% and −3%. The numerical results indicated that the MOC model is less accurate than the IMOC in properly modeling the wave propagation speed which resulted in a time lag accumulation between numerical results and the measurements. It was found that the best combination of the numerical scheme and the head loss prediction equation was the IMOC model and the unsteady algorithm, which accurately simulated the time-history of pressure head within ±3% error.

Suggested Citation

  • Mohammad Bostan & Amir Hossein Azimi & Ali Akbar Akhtari & Hossein Bonakdari, 2021. "An Implicit Approach for Numerical Simulation of Water Hammer Induced Pressure in a Straight Pipe," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(15), pages 5155-5167, December.
    • Handle: RePEc:spr:waterr:v:35:y:2021:i:15:d:10.1007_s11269-021-02992-3
    DOI: 10.1007/s11269-021-02992-3
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    References listed on IDEAS

    as
    1. J. Yazdi & A. Hokmabadi & M. R. JaliliGhazizadeh, 2019. "Optimal Size and Placement of Water Hammer Protective Devices in Water Conveyance Pipelines," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(2), pages 569-590, January.
    2. Xiang Xie & Dibo Hou & Xiaoyu Tang & Hongjian Zhang, 2019. "Leakage Identification in Water Distribution Networks with Error Tolerance Capability," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(3), pages 1233-1247, February.
    3. Yuan Huang & Feifei Zheng & Huan-Feng Duan & Qingzhou Zhang, 2020. "Multi-Objective Optimal Design of Water Distribution Networks Accounting for Transient Impacts," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 34(4), pages 1517-1534, March.
    4. Mohammad Bostan & Ali Akbar Akhtari & Hossein Bonakdari & Farshad Jalili, 2019. "Optimal Design for Shock Damper with Genetic Algorithm to Control Water Hammer Effects in Complex Water Distribution Systems," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 33(5), pages 1665-1681, March.
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