Three-dimensional analysis of coherent flow structure around a single circular bridge pier

Show simple item record Keshavarzi, A en Melville, Bruce en Ball, J en 2016-12-12T03:43:32Z en 2014 en
dc.identifier.citation Environmental Fluid Mechanics 14(4):821-847 2013 en
dc.identifier.issn 1567-7419 en
dc.identifier.uri en
dc.description.abstract The coherent turbulent flow around a single circular bridge pier and its effects on the bed scouring pattern is investigated in this study. The coherent turbulent flow and associated shear stresses play a major role in sediment entrainment from the bed particularly around a bridge pier where complex vortex structures exist. The conventional two-dimensional quadrant analysis of the bursting process is unable to define sediment entrainment, particularly where fully three-dimensional flow structures exist. In this paper, three-dimensional octant analysis was used to improve understanding of the role of bursting events in the process of particle entrainment. In this study, the three-dimensional velocity of flow was measured at 102 points near the bed of an open channel using an Acoustic Doppler Velocity meter (Micro-ADV). The pattern of bed scouring was measured during the experiment. The velocity data were analysed using the Markov process to investigate the sequential occurrence of bursting events and to determine the transition probability of the bursting events. The results showed that external sweep and internal ejection events were an effective mechanism for sediment entrainment around a single circular bridge pier. The results are useful in understanding scour patterns around bridge piers. en
dc.publisher Springer Science+Business Media Dordrecht en
dc.relation.ispartofseries Environmental Fluid Mechanics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri en
dc.title Three-dimensional analysis of coherent flow structure around a single circular bridge pier en
dc.type Journal Article en
dc.identifier.doi 10.1007/s10652-013-9332-1 en
pubs.issue 4 en
pubs.begin-page 821 en
pubs.volume 14 en
dc.rights.holder Copyright: Springer en
pubs.end-page 847 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 423013 en Engineering en Civil and Environmental Eng en
dc.identifier.eissn 1573-1510 en
pubs.record-created-at-source-date 2014-01-14 en 2014-01-17 en

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