Showing papers by "Francois Clemens published in 2021"
TL;DR: In this paper, the structural failure of round and egg-shaped sewer pipes is investigated by means of laboratory experiments and finite element method analyses, and two different round pipes are considered, which have an inner diameter of 400mm and 500mm, and are respectively referred to as R400 and R500 sewer pipes.
12 citations
TL;DR: In this study a Graph theory based method is developed and applied for efficiently identifying the most critical elements of a WDN and shows that the structure of the network is more decisive than the hydraulics with respect to the criticality of the system’s performance as a whole.
Abstract: Drinking water distribution networks (WDNs) are a crucial infrastructure for life in cities. Deterioration of this ageing, and partly hidden from view, infrastructure can result in losses due to le...
10 citations
TL;DR: In this paper, a low-cost camera-based automated system for the observation of FOG layer dynamics in wastewater pumping stations at high-frequency (minutes) over extended time windows (months).
9 citations
TL;DR: In this article, the turbulent flow of Herschel-Bulkley slurries through circular horizontal pipes is described, in particular that of concentrated domestic slurry obtained upon separation of domestic was discussed.
Abstract: This article concerns the turbulent flow of Herschel–Bulkley slurries through circular horizontal pipes; in particular, that of concentrated domestic slurry obtained upon separation of domestic was...
7 citations
TL;DR: In this paper, runoff (re)mobilises solids and their associated pollutants from streets and transports them via gully pots to the drainage system, and as the solids negatively impact the performance of the drainage s...
Abstract: Runoff (re)mobilises solids and their associated pollutants from streets and transports them via gully pots to the drainage system. As the solids negatively impact the performance of the drainage s...
4 citations
TL;DR: In this article, the transition from laminar to turbulent flow of non-Newtonian fluids is investigated using velocimetry data, which is obtained by applying particle image velo-imaging to images obtained through u...
Abstract: Transition from laminar to turbulent flow of non-Newtonian fluids is investigated using velocimetry data. These data are obtained by applying particle image velocimetry to images obtained through u...
4 citations
TL;DR: In this paper, experiments were conducted in a O600mm tank to analyze the 3D motion of buoyant particles in the free-surface vortex flow and revealed two stages in the particle motion.
Abstract: Experiments are conducted in a O600 mm tank to analyse the 3D motion of buoyant particles in the free-surface vortex flow. The experiments revealed two stages in the particle motion: stage 1 is the...
2 citations
TL;DR: In this article, the authors show that polyvinyl chloride (PVC) sewer pipes have operated for decades in a hostile environment, raising concern among sewer managers over the longevity of their drainage systems.
Abstract: Polyvinyl chloride (PVC) sewer pipes have operated for decades in a hostile environment, raising concern among sewer managers over the longevity of their drainage systems. Inspection data (CCTV and...
2 citations
TL;DR: In this article, the authors present an extensive monitoring cam-based system for urban runoff remobilisation and their associated pollutants from urban-built environments and transport them to drainage systems via gully pots.
Abstract: Urban runoff remobilises solids and their associated pollutants from urban-built environments and transports them to drainage systems via gully pots. This study presents an extensive monitoring cam...
1 citations
TL;DR: Duan et al. as mentioned in this paper performed an experimental study on the 3D flow field of a free-surface vortex using stereo PIV and showed that the PIV can be used to estimate the 3-dimensional flow field.
Abstract: Closure to “Experimental study on the 3D-flow field of a free-surface vortex using stereo PIV” by ALEX DUINMEIJER, GOSSE OLDENZIEL and FRANCOIS CLEMENS, J. Hydraulic Res. 58(1), 2020, 105–119, http...