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Dealing with Zero Flows in the Simulation of Water Distribution Networks with Low-Resistance Pipes Using the Global Gradient Algorithm

Author

Listed:
  • Nikolai B. Gorev

    (National Academy of Sciences of Ukraine)

  • Vyacheslav N. Gorev

    (Dnipro University of Technology)

  • Inna F. Kodzhespirova

    (National Academy of Sciences of Ukraine)

  • Igor A. Shedlovsky

    (Dnipro University of Technology)

  • P. Sivakumar

    (North Eastern Regional Institute of Science and Technology (Deemed To Be University))

Abstract

This paper shows that the zero flow treatment algorithm and the convergence criteria of EPANET 2.2, the latest version of the EPANET 2 open-source software package, may be responsible for convergence to distinctly inaccurate results in the case of networks with low-resistance pipes. As an alternative, the paper suggests a zero flow treatment method proposed earlier, which is based on the smallness of the flow rather than the flow derivative of the head loss as in EPANET 2.2. To avoid spurious convergence, the EPANET 2.2 convergence criteria may be complemented with a criterion based on the flow residuals of the energy balance equations. The monotony of the head loss vs. flow relationship allows these residuals to be checked for a specified tolerance without solving the energy balance equations for the flow.

Suggested Citation

  • Nikolai B. Gorev & Vyacheslav N. Gorev & Inna F. Kodzhespirova & Igor A. Shedlovsky & P. Sivakumar, 2022. "Dealing with Zero Flows in the Simulation of Water Distribution Networks with Low-Resistance Pipes Using the Global Gradient Algorithm," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(5), pages 1679-1691, March.
    • Handle: RePEc:spr:waterr:v:36:y:2022:i:5:d:10.1007_s11269-022-03100-9
    DOI: 10.1007/s11269-022-03100-9
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    References listed on IDEAS

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    1. P. Sivakumar & R. Prasad, 2014. "Simulation of Water Distribution Network under Pressure-Deficient Condition," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(10), pages 3271-3290, August.
    2. D. Paez & C. R. Suribabu & Y. Filion, 2018. "Method for Extended Period Simulation of Water Distribution Networks with Pressure Driven Demands," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 32(8), pages 2837-2846, June.
    3. Calvin Siew & Tiku Tanyimboh, 2012. "Pressure-Dependent EPANET Extension," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(6), pages 1477-1498, April.
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