CFD Study and Investigation of the Critical Ratio for Pressure-Head Ratio inside Drainage Manholes

Authors

  • Sifa Yohana Baseka Nelson Mandela African Institution of Science and Technology, Tanzania
  • Verdiana Grace Masanja The Nelson Mandela African Institution of Science and Technology , Tanzania

DOI:

https://doi.org/10.31695/IJASRE.2022.8.1.7

Keywords:

Manhole to Pipe Ratio, Sewage Water, Manhole Overflow

Abstract

The objective of this research is to study the pressure-head rising inside a manhole in pipelines, in relationship with the ratio from manhole diameters to its pipes diameters. The research team adopted CFD to simulate the manhole flows, at different conditions of varying inlet and outlet pipes diameter and manhole diameters. The risk of manhole overflow can also be reduced by controlling how fast is the rate of pressure-head rise per given flow rate. To reduce the peak and rate of rising of pressure-head column inside the manhole to be attained, the ratio between manhole widths (diameter) to its pipe diameter should be taken into considerations. Based on CFD analysis it is found that ratios less than 3 are shown to have better results, producing lower peak values of pressure-head to be attained inside manholes.

References

T. Chang, C. Wang, A. S. Chen, and S. Djordjević, “The influence of inlet drainage in modelling flow interactions between the storm sewer system and overland surface,” J. Hydrol., vol. 559, no. April 2018, pp. 541–555, 2018, doi: 10.1016/j.jhydrol.2018.01.066.

M. C. Pastore, “Reworking the relation between sanitation and the city in Dar es Salaam, Tanzania,” Environ. Urban., vol. 27, no. 2, pp. 473–488, 2015, doi: 10.1177/0956247815592285.

R. Moeini and M. H. Afshar, “Arc Based Ant Colony Optimization Algorithm for the optimal design of gravitational sewer networks,” Ain Shams Eng. J., vol. 8, no. 2, pp. 207–223, 2017, doi: 10.1016/j.asej.2016.03.003.

P. K. Swamee and A. K. Sharma, “Optimal design of a sewer line using Linear Programming,” Appl. Math. Model., vol. 37, no. 6, pp. 4430–4439, 2013, doi: 10.1016/j.apm.2012.09.041.

N. A. Beg, R. F. Carvalho, J. Leandro, P. Lopes, and L. Cartaxo, “Investigation of the Flow Field inside a Drainage System : Gully - Pipe - Manhole,” 2016, doi: 10.15142/T3859Z.

F. Sánchez, A. S. Kaiser, A. Viedma, and A. Gómez, “Effects of the aeration on the fluid dynamic behaviour of a multi-zone activated sludge system,” vol. 202, no. Wm, 2016, doi: 10.2495/WM160281.

T. Nawrot, R. Matz, R. Błazejewski, and M. Spychala, “A case study of a small diameter gravity sewerage system in Zolkiewka Commune, Poland,” Water (Switzerland), vol. 10, no. 10, 2018, doi: 10.3390/w10101358.

S. Yohana Baseka and V. Grace Masanja, “Computational Fluid Dynamics of Manhole Overflow Due to Storm-water Inflow,” J. Math. Informatics, vol. 18, no. January, pp. 33–44, 2020, doi: 10.22457/jmi.v18a3146.

M. Ramakrishna, Elements of computational fluid dynamics, vol. ol. 2. 2011.

A. Salih, “Conservation Equations of Fluid Dynamics,” no. February, pp. 1–8, 2011.

C. Sert, “Chapter 1 Governing Equations of Fluid Flow and Heat Transfer,” ME 582 Finite Elem. Anal. Thermofluids, pp. 1–13, 2012.

S. C. Xue and G. W. Barton, “Incompressible fluid flow simulations with flow rate as the sole information at synthetic inflow and outflow boundaries,” Int. J. Numer. Methods Fluids, vol. 78, no. 12, pp. 739–760, 2015, doi: 10.1002/fld.4039.

P. Khare, “Incompressible Flow, 4th Edition, by Ronald L. Panton,” Contemp. Phys., vol. 57, no. 1, pp. 117–118, 2015, doi: 10.1080/00107514.2015.1048302.

C. Factor, I. Pressure, E. S. Menon, and S. Manual, “Thermal Hydraulics Single-phase and Multiphase Flow in Natural Gas Production Systems,” 2015.

I. Uddin and M. Karim, “Application of Volume Of Fluid ( VOF ) Method for Prediction of Wave Generated by Flow around Cambered Hydrofoil,” Procedia Eng., vol. 194, pp. 82–89, 2017, doi: 10.1016/j.proeng.2017.08.120.

M. N. A. Beg, R. Carvalho, P. Lopes, J. Leandro, and N. Melo, “Numerical Investigation of the Flow Field inside a Manhole-Pipe Drainage System,” Hydraul. Struct. Water Syst. Manag. 6th IAHR Int. Symp. Hydraul. Struct., vol. 3706281608, pp. 1–11, 2016, doi: 10.15142/T370628160853.

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How to Cite

Sifa Yohana Baseka, & Verdiana Grace Masanja. (2022). CFD Study and Investigation of the Critical Ratio for Pressure-Head Ratio inside Drainage Manholes. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, 8(1), 52–58. https://doi.org/10.31695/IJASRE.2022.8.1.7

Issue

Vol. 8 No. 1: IJASRE Jan-2022

Section

Articles

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Copyright (c) 2022 Sifa Yohana Baseka, Verdiana Grace Masanja

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.