Hydraulic calculation of bridges at high water stages

Picek, Tomáš; Havlík, Aleš; Mattas, Daniel; Mares, Karel

doi:10.1080/00221686.2007.9521773

Cited by 19 publications

(11 citation statements)

References 3 publications

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“…However, in many practical applications, the presence of crossing structures which may interfere with the flow must be taken into account. Indeed, bridges and culverts may obstruct the flow significantly, thus inducing a backwater effect upstream (eg, ) with consequent potential increase of flood hazard in the surrounding areas. Furthermore, road infrastructures (such as viaducts, underpasses, tunnels, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…The near flow field is generally very complex due to the lateral and vertical contractions induced by this kind of singularities and typically shows a marked 3D character, particularly when overtopping occurs . Accordingly, vertical accelerations are not negligible; hence, the shallow water assumption of gradually varied flow should not be considered valid locally.…”

Section: Introductionmentioning

confidence: 99%

“…13 The near flow field is generally very complex due to the lateral and vertical contractions induced by this kind of singularities and typically shows a marked 3D character, particularly when overtopping occurs. 10,14 Accordingly, vertical accelerations are not negligible; hence, the shallow water assumption of gradually varied flow should not be considered valid locally. To overcome this difficulty in 2D shallow water modeling, numerical strategies commonly adopted consist in a synthetic representation of the effect of the structure through the introduction of suitable internal boundary conditions [15][16][17] or additional head losses.…”

Section: Introductionmentioning

confidence: 99%

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Numerical treatment of a discontinuous top surface in 2D shallow water mixed flow modeling

Maranzoni

Mignosa

2017

Numerical Methods in Fluids

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Summary This paper presents a numerical strategy based on shallow water equations (SWE) coupled with the 2D Preissmann slot model to handle a ceiling step discontinuity in finite volume schemes for mixed flow modeling. In practice, a typical situation would be a closed structure, such as a bridge or culvert, which induces a sudden vertical flow constriction and may even run partly or totally full in high flow conditions. In such case, both the inlet and outlet of the structure involve a discontinuity in the top elevation. This special singularity is topologically represented by inserting a fictitious cell between 2 adjacent computational cells characterized by sharply different ceiling elevation. The 2D SWE are solved by means of a well‐balanced quasi‐conservative Godunov‐type numerical scheme based on the Slope Limiter Centered (SLIC) scheme. The flow variables at each boundary of the fictitious cell are reconstructed by adopting the cross‐sectional shape of the adjoining cell. Accordingly, the dynamic effect of the structure deck on the flow is suitably modeled, and the C‐property for a stationary solution is rigorously satisfied, even when the closed structure is partially full. The capability of the numerical scheme is verified by comparison with both novel analytical solutions of 1D Riemann problems with a ceiling step discontinuity and experimental data of steady and unsteady mixed flows available in literature. Finally, a real‐scale application to a multiple arch bridge is presented. The results show that the method is robust and effective in predicting the 2D features induced by a crossing structure on the flow dynamics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical treatment of a discontinuous top surface in 2D shallow water mixed flow modeling

Maranzoni

Mignosa

2017

Numerical Methods in Fluids

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“…An accurate estimation of afflux is the main objective in the hydraulic design of bridges with studies of backwater calculations continuing (Martín-Vide 2005, Picek et al 2007). The experimental data include also the measured afflux values for all 25 cases, allowing us to evaluate here also the performance of FLOW-3D.…”

Section: Resultsmentioning

confidence: 99%

3D model for prediction of flow profiles around bridges

Kocaman

Seçkin²,

Erduran

2010

Journal of Hydraulic Research

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Computational fluid dynamics models have become well established as tools for simulating free surface flow over a wide range of structures. This study is an assessment and comparison of the performance of a commercially available three-dimensional numerical software, which solves the Reynoldsaveraged Navier -Stokes equations, to predict the free surface profiles from up-to downstream of four different bridge types with and without piers in a compound channel. The model results were compared with the available experimental data. Comparisons indicate that the model provides a reasonably good description of free surface profiles under both gradually and rapidly varied flow conditions in the bridge vicinity, respectively.

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“…However, there are only a few studies reported in the literature on flow over inundated bridges and the accompanying water surface profiles. Picek, Havlik, Mattas, & Mares (2007) conducted experiments to derive equations for backwater and discharge for flows through partially or fullysubmerged rectangular bridge decks. Malavasi & Guadagnini (2003) carried out experiments to examine the hydrodynamic loading on a bridge deck having a rectangular cross-section for different submergence levels and deck Froude numbers.…”

Section: Introductionmentioning

confidence: 99%

Flow dynamics through a submerged bridge opening with overtopping

Kara

Stoesser

Sturm

et al. 2014

Journal of Hydraulic Research

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This paper reports the results of detailed numerical simulations of the flow over a submerged bridge. The method of Large Eddy Simulation (LES) is applied, which allows elucidation of the instantaneous flow and accurate quantification of its turbulence statistics. The in-house LES code employs a free surface algorithm based on the Level Set Method (LSM) to determine the complex water surface profile over the bridge, which is validated with data from a physical model of the bridge under analogous flow conditions. Numerically predicted water surface profiles show good agreement with measured data. The water surface resembles that of the flow over a broad-crested weir with a plunging nappe and a standing wave downstream of the bridge. The mean flow is characterized by a multitude of complex flow features including horizontal recirculation zones upstream and downstream of the bridge abutment and vertical recirculation zones of the separated plunging flow. The latter influences significantly the near-bed turbulence and the bed shear stress.

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Hydraulic calculation of bridges at high water stages

Cited by 19 publications

References 3 publications

Numerical treatment of a discontinuous top surface in 2D shallow water mixed flow modeling

Numerical treatment of a discontinuous top surface in 2D shallow water mixed flow modeling

3D model for prediction of flow profiles around bridges

Flow dynamics through a submerged bridge opening with overtopping

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