Hydraulic and numerical analysis of non-uniform and two-phase wastewater flow in sewer pipelines
Keywords:
Non-uniform flow, Wastewater, Sewer system, Pipeline slope, Pumerical modeling, VelocityAbstract
This article examines the characteristics of non-uniform and two-phase (water–air) wastewater flow in sewer systems. Non-uniform flow, caused by sediment formation and operational condition changes, can lead to sludge buildup and decreased system efficiency. Classical equations of non-uniform flow, including critical depth and drawdown length calculations, are applied for hydraulic analysis. In the numerical part, the ANSYS software suite is used to simulate two-phase flow with VOF (Volume of Fluid) and DPM (Discrete Phase Model), as well as the GEKO turbulence model. The results enable visualization of spatial water and air distribution within pipes, evaluate particle behavior of various densities, and determine how pipeline slopes influence flow patterns. The analysis emphasizes the necessity of considering both non-uniform and two-phase flow regimes in the design and operation of sewer systems.
References
[1] Abdullaev B. et al. Factors affecting the hydrodynamic state of the Sokh groundwater deposit //AIP Conference Proceedings. – AIP Publishing LLC, 2025. – Т. 3256. – №. 1. –С. 040024. https://doi.org/10.1063/5.0267042.
[2] Abdullaev, B., Artikbekova, F., Meliyev, B., Sultonov, A., Suvonova, L., & Alikarieva, D (2025, July). Factors affecting the hydrodynamic state of the Sokh groundwater deposit. In AIP Conference Proceedings (Vol. 3256, No. 1, p. 040024). AIP Publishing LLC.https://doi.org/10.1063/5.0267042.
[3] Glovatskii O. et al. Experience in using methods for monitoring the energy efficiency of hydraulic systems //IOP Conference Series: Earth and Environmental Science. – IOP. Publishing, 2023. – Т. 1142. – №. 1. – С. 012004. DOI 10.1088/1755-1315/1142/1/012004.
[4] Akhundov, R., Tangirov, A., & Sultonov, A. (2025). Political Dimensions of Global Ecological Governance Frameworks. In BIO Web of Conferences (Vol. 151, p. 02008). EDP Sciences. https://doi.org/10.1051/bioconf/202515102008.
[5] Yu Qian, Weiyun Shao, Khaled.A.A. Modeling air flow in sanitary sewer systems. Journal of Hydro-environment Research Volume 38, September 2021, Pages 84-95. https://doi.org/10.1016/j.jher.2020.10.003
[6] Мельник Ольга Валериевна. Повышение эффективности проектирования и эксплуатации самотечных водоотводящих сетей на базе математического моделирования режима их работы. 2.1.4 - Водоснабжение, канализация, строительные системы охраны водных ресурсов. Москва – 2024.
[7] Дежина Ирина Сергеевна. Повышение транспортирующей способности самотечных трубопроводов с учетом гидрофобности и рельефа их поверхности. 2.1.4. Водоснабжение, канализация, строительные системы охраны водных ресурсов. Москва 2021.
[8] Н.Ф.Федров, А.М.Курганов, М.И.Алексеев. Канализационные сети примеры расчета. Москва, Стройиздат (2016).
[9] Crowe, C. T., Schwarzkopf, J. D., Sommerfeld, M., & Tsuji, Y. (2015). Multiphase flows with droplets and particles. CRC Press
[10] Hu, C., & Liu, C. (2018). Simulation of violent free surface flow by AMR method.Journal of Hydrodynamics, 30, 384–389. https://doi.org/10.1007/s42241-018-0043-4.
[11] Main reserves for increasing the efficiency of solar thermal energy in heat supply systems. Yu K Rashidov, K Yu Rashidov, II Mukhin, Kh T Suratov, JT Orzimatov, Sh Sh Karshiev.
[12] Transition processes during the start-up of the pumping unit of happ. Z.E. Abdulkhaev, M.M. Madraximov, JT Orzimatov, AM Abdurazaqov.
[13] The method of hydraulic calculation of a heat exchange panel of a solar water-heating collector of a tube–tube type with a given nonuniform distribution of fluid flow along lifting pipes. Yu K Rashidov, JT Orzimatov, K Yu Rashidov, ZX Fayziev. Applied Solar Energy 56, 30-34
[14] Подготовка питьевой воды из маломощных поверхностных водоисточников. Зулхумор Кахрамон кизи Ибрагимова, Нозимахон Сохибжон кизи Хамдамова, Шахзодбек Хамдамжон угли Умуркулов, Дониёржон Расулжон угли Сабиров. Central Asian Research Journal for Interdisciplinary Studies (CARJIS), Special Issue 4, 77- 83(2021).
[15] Malikov, Z. M., Mirzoev, A. A., & Madaliev, M. (2022). Numerical simulation of the mixing layer problem based on a new two-fluid turbulence model. Journal of Computational Applied Mechanics, 53(2), 282-296.
[16] Malikov, Z. M., Madaliev, M. E., Navruzov, D. P., & Adilov, K. (2022, October). Numerical study of an axisymmetric jet based on a new two-fluid turbulence model. In AIP Conference Proceedings (Vol. 2637, No. 1). AIP Publishing.
[17] Madaliev, M., Yunusaliev, E., Usmanov, A., Usmonova, N., & Muxammadyoqubov, K. (2023). Numerical study of flow around flat plate using higher-order accuracy scheme. In E3S Web of Conferences (Vol. 365, p. 01011). EDP Sciences.
[18] Madaliev, E., Madaliev, M., Raxmankulov, S., & Raxmonkulova, S. (2023). Turbulent mixing of two plane flows based on the SST turbulence model. In E3S Web of Conferences (Vol. 452, p. 02012). EDP Sciences.
[19] Совершенствование биореакторов для очистки сточных вод. Рахмоналиев Санжар Мухаммаджон ўғли Умуркулов Шахзодбек Хамдамжон ўғли, Сабиров Дониёр Расулжон ўғли. (2021). Models and methods in modern science (volume 2, pages 88), FRENCH International Scientific Online Conference.
[20] Mathematical modeling of particle movement in laminar flow in a pipe. A Ibrokhimov, J.Orzimatov, M Usmonov, B Otakulov, S Mirzababayeva. BIO Web of Conferences 84, 02026.
Downloads
Published
Conference Proceedings Volume
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.