Sediment particles and turbulent flow simulation around bridge piers

Pasiok, R.; Stilger-Szydło, E.

doi:10.1016/s1644-9665(12)60051-x

Cited by 28 publications

(13 citation statements)

References 6 publications

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“…The mechanisms of scour around bridge piers are still under investigations. Numerical models are often used for turbulent flow investigations [15]. Flow observations reveal that a complex flow pattern occurs even in the case of a simple geometric hydraulic structure [16].…”

Section: Numerical Simulationsmentioning

confidence: 99%

Scour around Bridge Piers: Numerical Investigations of the Longitudinal Biconcave Pier Shape

Bouabdellah

Seddini

Ghenim

2018

Period. Polytech. Mech. Eng.

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The flow pattern around a bridge pier and the scouring phenomenon are very complicated. The basic mechanism causing local scour is the down-flow at the upstream face of the pier. It is understood that the horseshoe vortex is the key mechanism that leads to the local scour around pier; existing literature revealed that the strength of the down-flow, horseshoe vortex and the wake vortex are greater in the case of square piers compared to circular piers. In this paper we have investigated a new longitudinal biconcave bridge pier shape that reduces better the bed shear stress. For that purpose, a number of numerical simulations have been carried out using a Finite Volume Method (FVM) and for the turbulence model we have chosen the Detached Eddy Simulation (DES) for its capability to capture the rich dynamics of the horseshoe vortex at the upstream junction between the pier and the bed.The present study shows that the new longitudinal biconcave bridge pier shape reduces 10 % to 12 % the bed shear stress at the junction between the pier and the bed in other hand this shape increases the bed shear stress about 20 % but at a distance of D downstream the bridge pier in the flow direction.

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Section: Numerical Simulationsmentioning

confidence: 99%

Scour around Bridge Piers: Numerical Investigations of the Longitudinal Biconcave Pier Shape

Bouabdellah

Seddini

Ghenim

2018

Period. Polytech. Mech. Eng.

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“…OpenFOAM release version 2.0 was used for the work presented in this study. Several numerical studies applied OpenFOAM and validated the code against field/experimental data or other CFD software (Panara et al 2006;Carneiro et al 2008;Karvinen & Ahlstedt 2008;Pasiok & Stilger-Szydło 2010;Mahmoodi et al 2012;Sinha et al 2012).…”

Section: Openfoam Frameworkmentioning

confidence: 99%

Model development in OpenFOAM to predict spillway jet regimes

Wang

Politano

Laughery

et al. 2015

Journal of Applied Water Engineering and Research

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Hydropower is the most important renewable energy source. Though hydropower provides abundant benefits, dams have also altered natural flow conditions affecting fish habitat. Elevated total dissolved gas (TDG) can result in gas bubble disease in affected fish. TDG production depends on the gas volume fraction and bubble depth in the tailrace, which are a function of spillway jet regimes. This paper presents a model developed in OpenFOAM to predict spillway jet regimes. The model utilizes the volume of fluid method to capture the dynamic free surface. A Large Eddy Simulation model, together with Detached Eddy Simulation, was used for turbulence closure. The model adequately reproduced jet regimes observed in a reduced-scale laboratory model. Differences in jet regimes predicted at reduced and prototype scales were observed. Results suggest that turbulence, not scaled in the laboratory model, plays an important role in the flow characteristics downstream of spillways.

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“…This unexpected lows of water can signiicantly damage bridge structures crossing these watercourses (see, e.g. Cajka and Manasek, 2005;Link et al, 2008;Pasiok and Stilger-Szydlo, 2010;Burns et al, 2011;Wang et al, 2011;Yu et al, 2011;Khosronejad et al, 2012;Collins et al, 2013;Lin et al, 2014;Afzali, 2015;Ehteram and Meymand, 2015;Klinga and Alipour, 2015;Fael et al, 2016;Mohamed et al, 2016). In association with this growing risk, a study examining efects of scour to a bridge abutment was elaborated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Contact Stress Model on the Stability of Bridge Abutment

Čajka¹,

Pustka²,

Sekanina³

2017

Proceedings of the 2nd Czech-China Scientific Conference 2016

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This chapter deals with the behaviour of an abutment pier on subsoil subjected to lood changes. The loods increase the cross-section of the river bed and change the properties of the foundation soil under the foundation. First, the soil saturates with water. Then, ine-grained particles will wash away and inally parts of the basement rock will be washed of. Finite element method has been used for the calculation of the interaction between the foundation and the subsoil. The foundation has been modelled in a 2D environment using spatial components. For the subsoil, an element with efects of an elastic foundation has been used. The stifness of the bedrock has been characterized by the C parameter. The chapter describes situations related to the collapse of the structure.

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Sediment particles and turbulent flow simulation around bridge piers

Cited by 28 publications

References 6 publications

Scour around Bridge Piers: Numerical Investigations of the Longitudinal Biconcave Pier Shape

Scour around Bridge Piers: Numerical Investigations of the Longitudinal Biconcave Pier Shape

Model development in OpenFOAM to predict spillway jet regimes

Influence of Contact Stress Model on the Stability of Bridge Abutment

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