Experimental Characterization of the Flow Field around Oblong Bridge Piers

The prediction of scour evolution at bridge foundations is of utmost importance for engineering design and infrastructures’ safety. The complexity of the scouring inherent flow field is the result of separation and generation of multiple vortices and further magnified due to the dynamic interaction...

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Autores principales:	Ana Margarida Bento, Teresa Viseu, João Pedro Pêgo, Lúcia Couto
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	bridge pier flat and eroded bed flow field velocity profile measurements Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/73c5cb2920ef4a7592ad6a2fe044a033
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spelling	oai:doaj.org-article:73c5cb2920ef4a7592ad6a2fe044a0332021-11-25T17:31:21ZExperimental Characterization of the Flow Field around Oblong Bridge Piers10.3390/fluids61103702311-5521https://doaj.org/article/73c5cb2920ef4a7592ad6a2fe044a0332021-10-01T00:00:00Zhttps://www.mdpi.com/2311-5521/6/11/370https://doaj.org/toc/2311-5521The prediction of scour evolution at bridge foundations is of utmost importance for engineering design and infrastructures’ safety. The complexity of the scouring inherent flow field is the result of separation and generation of multiple vortices and further magnified due to the dynamic interaction between the flow and the movable bed throughout the development of a scour hole. In experimental environments, the current approaches for scour characterization rely mainly on measurements of the evolution of movable beds rather than on flow field characterization. This paper investigates the turbulent flow field around oblong bridge pier models in a well-controlled laboratory environment, for understanding the mechanisms of flow responsible for current-induced scour. This study was based on an experimental campaign planned for velocity measurements of the flow around oblong bridge pier models, of different widths, carried out in a large-scale tilting flume. Measurements of stream-wise, cross-wise and vertical velocity distributions, as well as of the Reynolds shear stresses, were performed at both the flat and eroded bed stages of scouring development with a high-resolution acoustic velocimeter. The time-averaged values of velocity and shear stress are larger in the presence of a developed scour hole than in the corresponding flat bed configuration.Ana Margarida BentoTeresa ViseuJoão Pedro PêgoLúcia CoutoMDPI AGarticlebridge pierflat and eroded bedflow fieldvelocity profile measurementsThermodynamicsQC310.15-319Descriptive and experimental mechanicsQC120-168.85ENFluids, Vol 6, Iss 370, p 370 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bridge pier flat and eroded bed flow field velocity profile measurements Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85
spellingShingle	bridge pier flat and eroded bed flow field velocity profile measurements Thermodynamics QC310.15-319 Descriptive and experimental mechanics QC120-168.85 Ana Margarida Bento Teresa Viseu João Pedro Pêgo Lúcia Couto Experimental Characterization of the Flow Field around Oblong Bridge Piers
description	The prediction of scour evolution at bridge foundations is of utmost importance for engineering design and infrastructures’ safety. The complexity of the scouring inherent flow field is the result of separation and generation of multiple vortices and further magnified due to the dynamic interaction between the flow and the movable bed throughout the development of a scour hole. In experimental environments, the current approaches for scour characterization rely mainly on measurements of the evolution of movable beds rather than on flow field characterization. This paper investigates the turbulent flow field around oblong bridge pier models in a well-controlled laboratory environment, for understanding the mechanisms of flow responsible for current-induced scour. This study was based on an experimental campaign planned for velocity measurements of the flow around oblong bridge pier models, of different widths, carried out in a large-scale tilting flume. Measurements of stream-wise, cross-wise and vertical velocity distributions, as well as of the Reynolds shear stresses, were performed at both the flat and eroded bed stages of scouring development with a high-resolution acoustic velocimeter. The time-averaged values of velocity and shear stress are larger in the presence of a developed scour hole than in the corresponding flat bed configuration.
format	article
author	Ana Margarida Bento Teresa Viseu João Pedro Pêgo Lúcia Couto
author_facet	Ana Margarida Bento Teresa Viseu João Pedro Pêgo Lúcia Couto
author_sort	Ana Margarida Bento
title	Experimental Characterization of the Flow Field around Oblong Bridge Piers
title_short	Experimental Characterization of the Flow Field around Oblong Bridge Piers
title_full	Experimental Characterization of the Flow Field around Oblong Bridge Piers
title_fullStr	Experimental Characterization of the Flow Field around Oblong Bridge Piers
title_full_unstemmed	Experimental Characterization of the Flow Field around Oblong Bridge Piers
title_sort	experimental characterization of the flow field around oblong bridge piers
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/73c5cb2920ef4a7592ad6a2fe044a033
work_keys_str_mv	AT anamargaridabento experimentalcharacterizationoftheflowfieldaroundoblongbridgepiers AT teresaviseu experimentalcharacterizationoftheflowfieldaroundoblongbridgepiers AT joaopedropego experimentalcharacterizationoftheflowfieldaroundoblongbridgepiers AT luciacouto experimentalcharacterizationoftheflowfieldaroundoblongbridgepiers
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Experimental Characterization of the Flow Field around Oblong Bridge Piers

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