Numerical and experimental characterization of the 2D vertical average-velocity plane at the center-profile and qualitative air entrainment inside a gully for drainage and reverse flow

Leandro, Jorge; Lopes, Pedro; Carvalho, Rita F.; Páscoa, Patrícia; Martins, Ricardo; Romagnoli, Martín

doi:10.1016/j.compfluid.2014.05.032

Cited by 22 publications

(7 citation statements)

References 23 publications

(26 reference statements)

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“…Studies on linkage systems are usually focused on experimental facilities with emphasis on the efficiency (Bock et al, ; Gómez & Russo, ; Gómez & Russo, ; Li, Geyer, et al, ; Li, Sorteberg, et al, ; Li et al, , ; Martins et al, ; Russo et al, ) or the use of fully 3‐D CFD models to study the characteristics of the flow inside the manhole (Djordjevic et al, ; Leandro et al, ; Lopes et al, , ). Studies that verify the applicability of 2‐D models to directly reproduce drainage flows and flow conditions close to the linkage structure on the floodplain during flood events are however scarce (Martins, Kesserwani, et al, ; Rubinato et al, ), and proper validation is usually focused on the bed elevation (Cea et al, ) far from the interface structures.…”

Section: Introductionmentioning

confidence: 99%

On the Characteristics of Velocities Fields in the Vicinity of Manhole Inlet Grates During Flood Events

Martins

Rubinato

Kesserwani

et al. 2018

Water Resources Research

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The accurate characterization of flow from urban surfaces to sewer/stormwater systems is important for urban drainage design and flood modeling/risk identification. However, the geometrical complexity and large variety of drainage structures (linking elements) available makes model calibration and verification difficult. In this study an extensive comparison between experimentally measured and numerically modeled flow characteristics in the vicinity of ten different designs of manhole grate was performed under drainage flow in subcritical conditions. Using a 2‐D surface PIV (sPIV) system the work presents the first detailed characterization of velocity fields around these linking elements. In addition, it provides the first detailed verification of the ability of a 2‐D numerical model to describe both velocity fields and drainage flows. The overall comparison shows a close relationship between numerical and the experimental results with some higher inflows in the experimental results as a consequence of a localized transition from weir to orifice condition near the void areas of the grates. It was also noted that velocity differences decreased further from the manhole, due mainly to the more directional flow. Overall the work demonstrates the potential for further use of 2‐D numerical models to describe flow conditions at linking elements, either directly within modeling simulations or indirectly via the characterization of energy loss coefficients.

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Section: Introductionmentioning

confidence: 99%

On the Characteristics of Velocities Fields in the Vicinity of Manhole Inlet Grates During Flood Events

Martins

Rubinato

Kesserwani

et al. 2018

Water Resources Research

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“…Nasello and Tucciarelli (2005) applied a similar concept to a 1D/2D model with linkage through weir and orifice equations. The weir and orifice equations are usually calibrated with parameters obtained from experimental studies or using Computational Fluid Dynamics (CFD) simulations that can account for the full complexity of the linkage structure (Lopes et al, 2013;Martins et al, 2014;Leandro et al, 2014b). Mahdizadeh et al (2011Mahdizadeh et al ( , 2012) introduced a novel model for the shallow water equations (SWEs) where inflowas and outflows are computed using the approach they termed a flux differencing methodology.…”

Section: Introductionmentioning

confidence: 99%

A comparison of three dual drainage models: shallow water vs local inertial vs diffusive wave

Martins

Leandro

Chen

et al. 2017

Journal of Hydroinformatics

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In this study we compared three overland flow models, a full dynamic model (shallow water equation), a local inertial equations model (gravity wave model), and a diffusive wave model (parallel diffusive wave model). The three models are coupled with the same full dynamic sewer network model (SIPSON). We adopted the volume exchange between sewer and overland flow models, and the hydraulic head and discharge rates at the linked manholes to evaluate differences between the models. For that purpose we developed a novel methodology based on RGB scale. The test results of a real case study show a close agreement between coupled models in terms of the extents of flooding, depth and volume exchanged, despite highly complex flows and geometries. The diffusive wave model gives slightly higher maximum flood depths and a slower propagation of the flood front when compared to the other two models. The local inertial model shows to a slight extent higher depths downstream as the wave front is slower than the one in the fully dynamic model. Overall, the simplified overland models can produce comparable results to fully dynamic models with less computational cost.

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“…Under normal conditions (i.e., non pressurised sub-surface system), water from the surface drains into the sub-surface domain via storm drain inlets (sometimes referred to as gullies) (Figure 1). In case of a pressurised sub-surface system, a reverse flow [5] can lead to surcharging conditions at storm drain inlets and/or manholes. Manholes are located between pipe sections of different diameters, changes in direction or gradient, junctions of pipes, and at designed intervals that are required to provide access to the sub-surface domain for maintenance and inspection purposes [6].…”

Section: Background To Urban Drainage Modelsmentioning

confidence: 99%

Urban Flood Simulation Using Synthetic Storm Drain Networks

Bertsch

Glenis

Kilsby

2017

Water

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Recent developments in urban drainage modelling allow for a more realistic coupling of the two-dimensional (2D) surface and one-dimensional (1D) sub-surface drainage domain exchanging water through storm drain inlets instead of a sub-catchment approach based on manholes. Experience has shown, however, that comprehensive records of storm drain inlet locations are often missing or incomplete, preventing users accessing the full benefit of these modelling capabilities. Therefore, this study developed a GIS routine to generate synthetic storm drain inlet locations for the purpose of urban flood modelling. Hydrodynamic model results for a synthetically generated and surveyed storm drain inlet network were obtained using the CityCAT 1D/2D system. On a catchment scale the flow field (surface and flow captured by inlets) simulated by the network of synthetic storm drainage inlets shows satisfactory results when compared with that simulated using the actual network. The results also highlight the sensitivity of the inflows to relatively small changes in terms of the location of storm drain inlets and the effectiveness of storm drain inlets in ponding areas.

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Numerical and experimental characterization of the 2D vertical average-velocity plane at the center-profile and qualitative air entrainment inside a gully for drainage and reverse flow

Abstract: Numerical and experimental characterization of the 2D vertical average-velocity plane at the centre-profile and qualitative air entrainment inside a gully for drainage and reverse flow, Computers & Fluids (2014),

Cited by 22 publications

References 23 publications

On the Characteristics of Velocities Fields in the Vicinity of Manhole Inlet Grates During Flood Events

On the Characteristics of Velocities Fields in the Vicinity of Manhole Inlet Grates During Flood Events

A comparison of three dual drainage models: shallow water vs local inertial vs diffusive wave

Urban Flood Simulation Using Synthetic Storm Drain Networks

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