PIV measurement of coherent flow structure over gravels in a river bed

Keshavarzi, A; Ball, J

PIV measurement of coherent flow structure over gravels in a river bed

Keshavarzi, A Ball, J

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Publication Type:: Conference Proceeding
Citation:: Proceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012, 2012, pp. 1610 - 1617
Issue Date:: 2012-01-01

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Field	Value	Language
dc.contributor.author	Keshavarzi, A	en_US
dc.contributor.author	Ball, J https://orcid.org/0000-0001-8342-1916	en_US
dc.date.issued	2012-01-01	en_US
dc.identifier.citation	Proceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012, 2012, pp. 1610 - 1617	en_US
dc.identifier.isbn	9781922107626	en_US
dc.identifier.uri	http://hdl.handle.net/10453/31534
dc.description.abstract	© 2012 Engineers Australia. An experimental study of the role of coherent structures and their effect on initiation of sediment particles has been carried out using a laboratory flume. Experiments were conducted under different flow conditions and fixed bed. Spherical gravels with diameter of 65 mm were installed at the bed of flume. The spherical gravels exposed 20 mm above the bed surface. The two dimensional instantaneous flow velocity was measured simultaneously over the gravels using Particle Image Velocimetry (PIV). The PIV advantage is to measure instantaneous information of coherent flow structure in time and space simultaneously. Quadrant analysis of two instantaneous flow structures revealed a dominant sweep event at above the particles whereas inward interactions was found low probable event above the spherical particles. The higher inclination angle was also found for sweep events which are likely to induce higher momentum than other events. The results of this study are useful to define entrainment of sediment particles at the bed of river.	en_US
dc.relation.ispartof	Proceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012	en_US
dc.title	PIV measurement of coherent flow structure over gravels in a river bed	en_US
dc.type	Conference Proceeding
utslib.for	090509 Water Resources Engineering	en_US
dc.location.activity	Sydney, Australia
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

© 2012 Engineers Australia. An experimental study of the role of coherent structures and their effect on initiation of sediment particles has been carried out using a laboratory flume. Experiments were conducted under different flow conditions and fixed bed. Spherical gravels with diameter of 65 mm were installed at the bed of flume. The spherical gravels exposed 20 mm above the bed surface. The two dimensional instantaneous flow velocity was measured simultaneously over the gravels using Particle Image Velocimetry (PIV). The PIV advantage is to measure instantaneous information of coherent flow structure in time and space simultaneously. Quadrant analysis of two instantaneous flow structures revealed a dominant sweep event at above the particles whereas inward interactions was found low probable event above the spherical particles. The higher inclination angle was also found for sweep events which are likely to induce higher momentum than other events. The results of this study are useful to define entrainment of sediment particles at the bed of river.

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http://hdl.handle.net/10453/31534