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Similarity velocity profile of vortex flow in the cavities between girders under a partially inundated bridge deck
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2014 (English)Conference paper (Refereed)
Abstract [en]

This paper presents the experimental results on similarity velocity profile of vortices inside the cavities, formed between two neighboring girders, under a partially inundated bridge deck. Particle image velocimetry (PIV) and flow visualization technique are both employed to explore the flow field. The approaching flow is subcritical with Froude number varying in the range 0.137–0.381. The velocity characteristics of vortex structure inside the cavities under a partially inundated bridge deck, where water is fully occupied without air-pocket, are mainly investigated. The similarity profile of the azimuthal velocity along an arbitrary line, passing through the vortex core, is uniquely obtained using the measured azimuthal velocities for two different flow types. The selection of the characteristic length and velocity scales used for obtaining the similarity profile is discussed in this study.

Place, publisher, year, edition, pages
Keyword [en]
inundated bridge decks, partially inundated flow, particle trajectory technique, particle image velocimetry
National Category
Civil Engineering
URN: urn:nbn:se:kth:diva-179751OAI: diva2:889227
16th Int. Sym. on Flow Visualization (ISFV16), June 2014. Okinawa, Japan

QC 20160107

Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2016-01-07Bibliographically approved

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Yang, James
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Hydraulic Engineering
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