Next Article in Journal
Use of a Novel Biopellet to Treat Total Petroleum Hydrocarbon Contaminated Groundwater
Next Article in Special Issue
Modelling Pluvial Flooding in Urban Areas Coupling the Models Iber and SWMM
Previous Article in Journal
Estimating Nitrogen and Phosphorus Cycles in a Timber Reef Deployment Area
Previous Article in Special Issue
Modeling Urban Flood Inundation and Recession Impacted by Manholes
Open AccessArticle

CFD Modelling of the Transport of Soluble Pollutants from Sewer Networks to Surface Flows during Urban Flood Events

1
Tulane River and Coastal Center, Tulane University, 1370 Port of New Orleans Pl, New Orleans, LA 70130, USA
2
MARE—Marine and Environmental Research Centre, Department of Civil Engineering, University of Coimbra, R. Luís Reis Santos, Polo 2, 3030-788 Coimbra, Portugal
3
School of Energy, Construction and Environment & Centre for Agroecology, Water and Resilience, Coventry University, Coventry CV1 5FB, UK
4
Department of Civil and Structural Engineering, the University of Sheffield, Mappin Street, Sheffield S1 3JD, UK
*
Author to whom correspondence should be addressed.
Water 2020, 12(9), 2514; https://doi.org/10.3390/w12092514
Received: 3 August 2020 / Revised: 30 August 2020 / Accepted: 1 September 2020 / Published: 9 September 2020
(This article belongs to the Special Issue Modelling of Floods in Urban Areas)
Surcharging urban drainage systems are a potential source of pathogenic contamination of floodwater. While a number of previous studies have investigated net sewer to surface hydraulic flow rates through manholes and gullies during flood events, an understanding of how pollutants move from sewer networks to surface flood water is currently lacking. This paper presents a 3D CFD model to quantify flow and solute mass exchange through hydraulic structures featuring complex interacting pipe and surface flows commonly associated with urban flood events. The model is compared against experimental datasets from a large-scale physical model designed to study pipe/surface interactions during flood simulations. Results show that the CFD model accurately describes pipe to surface flow partition and solute transport processes through the manhole in the experimental setup. After validation, the model is used to elucidate key timescales which describe mass flow rates entering surface flows from pipe networks. Numerical experiments show that following arrival of a well-mixed solute at the exchange structure, solute mass exchange to the surface grows asymptotically to a value equivalent to the ratio of flow partition, with associated timescales a function of the flow conditions and diffusive transport inside the manhole. View Full-Text
Keywords: pollutant transport; hydraulic structures; urban flooding; urban drainage; CFD pollutant transport; hydraulic structures; urban flooding; urban drainage; CFD
Show Figures

Figure 1

MDPI and ACS Style

Beg, M.N.A.; Rubinato, M.; Carvalho, R.F.; Shucksmith, J.D. CFD Modelling of the Transport of Soluble Pollutants from Sewer Networks to Surface Flows during Urban Flood Events. Water 2020, 12, 2514.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop