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The volume of the stilling basin can be reduced, energy can be dissipated, and floods can be contained with the help of spillways. The aim of this Computational Fluid Dynamics (CFD) study is to investigate how compound slopes change water flows through spillways. To measure turbulence, the Realizable k-ε model was used, and the multiphase volume of fluid (VOF) method was utilized to determine where air and water meet. Five models of spillways with different slopes (normal slope (MS1) = 30°, compound slope(MS2 and MS3) = 20°/39°, and compound slope (MS4 and MS5) = 39°/20°) were modelled and simulated using the ANSYS Fluent software to determine their flow characteristics. Numerical simulation results were compared to experimental results, and it was found that the CFD model captured the key flow aspects accurately. The numerical model carefully observes the several flow patterns (nappe, transition, and skimming) that emerged owing to variations in slope and geometry. When it comes to dissipating energy, models with a compound slope (39°/20°) do the best. When compared to the normal slope model (30°) with a step size of 10, the increase in energy dissipation is 14%. According to the findings, the TKE (turbulent kinetic energy) was elevated by the compound slope. The results of this research show that the spillway can be operated effectively and reliably under a wide range of flow conditions, fulfilling an important goal of the project.
Czasopismo
Rocznik
Tom
Strony
274--286
Opis fizyczny
Bibliogr. 23 poz., rys., tab.
Twórcy
autor
- Department of Environment Engineering, College of Engineering, University of Babylon, Babylon 51001, Iraq
autor
- Department of Environment Engineering, College of Engineering, University of Babylon, Babylon 51001, Iraq
autor
- Department of Civil Engineering, College of Engineering, University of Babylon, Babylon 51001, Iraq
autor
- Department of Civil Engineering, College of Engineering, University of Babylon, Babylon 51001, Iraq
autor
- Department of Civil Environmental and Natural Resources Engineering, Lulea University of Technology, SE-971 87 Lulea, Sweden
autor
- Department of Civil Environmental and Natural Resources Engineering, Lulea University of Technology, SE-971 87 Lulea, Sweden
Bibliografia
- 1. Castillo, L.G., Carrillo, J.M., García, J.T., & Vigueras-Rodríguez, A. 2014. Numerical simulations and laboratory measurements in hydraulic jumps. 11th International Conference on Hydroinformatics, HIC 2014.
- 2. Chamani, M.R., 2020. Air inception in skimming flow regime over stepped spillways. In Hydraulics of stepped spillways, 61–67, CRC Press.
- 3. Chanson, H., 2022. Energy dissipation on stepped spillways and hydraulic challenges-Prototype and laboratory experiences. Journal of Hydrodynamics, 34(1), 52–62.
- 4. Dong, Z., Wang, J., Vetsch, D.F., Boes, R.M. and Tan, G., 2019. Numerical simulation of air–water two-phase flow on stepped spillways behind x-shaped flaring gate piers under very high unit dis- charge. Water, 11(10),1956.
- 5. Felder, S. and Chanson, H., 2015. Aeration and airwater mass transfer on stepped chutes with embankment dam slopes. Environmental Fluid Mechanics, 15, 695–710.
- 6. Felder, S., 2013. Air-water flow properties on stepped spillways for embankment dams: Aeration, energy dissipation and turbulence on uniform, non-uniform and pooled stepped chutes. PhD thesis, Queensland University 2013.
- 7. Ghaderi, A. and Abbasi, S., 2021. Experimental and numerical study of the effects of geometric appendance elements on energy dissipation over stepped spillway. Water, 13(7), 957.
- 8. Ghaderi, A., Abbasi, S. and Di Francesco, S., 2021. Numerical study on the hydraulic properties of flow over different pooled stepped spillways. Water, 13(5),710.
- 9. Hamedi, A. and Ketabdar, M., 2016. Energy loss estimation and flow simulation in the skimming flow regime of stepped spillways with inclined steps and end sill: A numerical model. International Journal of Science and Engineering Applications, 5(7), 399–407.
- 10. Hamedi, A., Mansoori, A., Shamsai, A. and Amirahmadian, S., 2014. Effects of end sill and step slope on stepped spillway energy dissipation. Journal of Water Sciences Research, 6(1), 1–15.
- 11. Jahad, U.A., Al-Ameri, R. and Das, S., 2022. Investigations of velocity and pressure fluctuations over a stepped spillway with new step configuration. Water Supply, 22(7), 6321–6337.
- 12. Lebdiri, F., Seghir, A. and Berreksi, A., 2022. Multiobjective optimization of stepped spillway and stilling basin dimensions. Water Supply, 22(1), 766–778.
- 13. Ma, X., Zhang, J. and Hu, Y., 2022. Analysis of Energy Dissipation of Interval-Pooled Stepped Spillways. Entropy, 24(1), 85.
- 14. Mero, S. and Mitchell, S., 2017. Investigation of energy dissipation and flow regime over various forms of stepped spillways. Water and Environment Journal, 31(1), 127–137.
- 15. Raza, A., Wan, W. and Mehmood, K., 2021. Stepped spillway slope effect on air entrainment and inception point location. Water, 13(10), 1428.
- 16. Roushangar, K., Akhgar, S., Salmasi, F. and Shiri, J., 2014. Modeling energy dissipation over stepped spillways using machine learning approaches. Journal of Hydrology, 508, 254–265.
- 17. Salmasi, F. and Abraham, J., 2022. Effect of slope on energy dissipation for flow over a stepped spillway. Water Supply, 22(5), 5056–5069.
- 18. Shih, T.H., Liou, W.W., Shabbir, A., Yang, Z. and Zhu, J., 1994. A new k-epsilon eddy viscosity model for high Reynolds number turbulent flows: Model development and validation (No. CMOTT-946).
- 19. Torabi, H., Parsaie, A., Yonesi, H. and Mozafari, E., 2018. Energy dissipation on rough stepped spillways. Iranian Journal of Science and Technology, Transactions of Civil Engineering, 42, 325–330.
- 20. Valero, D. and Bung, D.B., 2018. Reformulating self-aeration in hydraulic structures: Turbulent growth of free surface perturbations leading to air entrainment. International Journal of Multiphase Flow, 100, 127–142.
- 21. Wan, W., Raza, A. and Chen, X., 2019. Effect of height and geometry of stepped spillway on inception point location. Applied Sciences, 9(10), 2091.
- 22. Yalcin, E.E., Ikinciogullari, E. and Kaya, N., 2023. Comparison of Turbulence Methods for a Stepped Spillway Using Computational Fluid Dynamics. Iranian Journal of Science and Technology, Transactions of Civil Engineering, 1–17.
- 23. Zhou, Y., Wu, J., Ma, F. and Hu, J., 2020. Uniform flow and energy dissipation of hydraulic-jump-stepped spillways. Water Supply, 20(4), 1546–1553.
Uwagi
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-8b9655bd-350c-4d8a-8f55-7247ff6d3923