Computational Fluid Dynamics of Manhole Overflow Due to Storm-water Inflow
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Date
2020-01-20
Authors
Baseka, Sifa Yohana
Masanja, Verdiana Grace
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Mathematics and Informatics
Abstract
In this study, the storm water overflow on manholes is numerically solved. To
produce a real representation of storm overflow, the Navier-Stokes equations were used.
Turbulence was modelled using the standard k-epsilon turbulence model together with
the volume of fluid method for phase surface tracking. The open-source computational
fluid dynamics (CFD) tool OpenFOAM 5.0 was used for solving the model while the
visualization tool, paraview 5.4.0, was used for processing the solution data. The
convergence test was performed at three different mesh sizes. The numerical solution
established mesh independence by producing similar results at varied meshes sizes. The
risen storm-water column inside the manhole exerts a non-uniform pressure on the
manhole cover. The non-uniform pressure distribution leads to different uplifting forces
at manhole cover areas. However, the global uplifting force remains constant as long as
the storm water overflow is occurring on the manhole. The overflow intensity on the
manhole is not the same, areas opposite to the outlet pipe provide the highest intensity of
the leaking storm-water.
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This research article published by the Journal of Mathematics and Informatics, 2020
Keywords
Manhole overflow, Storm-water inflow, Global force, Storm-water column