PIV study of turbulent flow around a circular bridge pier using fractal scaling

Keshavarzi, A; Ball, J

PIV study of turbulent flow around a circular bridge pier using fractal scaling

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. 1604 - 1609
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. 1604 - 1609	en_US
dc.identifier.isbn	9781922107626	en_US
dc.identifier.uri	http://hdl.handle.net/10453/31533
dc.description.abstract	© 2012 Engineers Australia. The flow structure around a bridge pier is complicated, particularly in the flow immediately downstream of a bridge pier. In the study reported herein, the fractal dimensions of velocity fluctuations (u, v) were investigated. Two dimensional velocity fluctuations at horizontal surface were measured using Particle Image Velocimetry (PIV). At each horizontal surface, 700 pairs of images were captured at a frequency of 15 Hz. The time interval between two frames in a pair of captured frames was 10 m seconds. The fractal dimensions were computed using a Fractal Interpolation Function (FIF) algorithm. From the results, it was found that the fractal dimensions fluctuated significantly in the streamwise and transverse flow directions in the vicinity of the pier. A symmetrical pattern of the fractal dimension was found at the rear of the bridge pier. Furthermore, it was found that the fractal dimensions of velocity fluctuations increased rapidly at vicinity of pier at downstream whereas it decreased far from the pier. Therefore, it can be concluded that the fractal dimension using FIF well describes the flow structure around bridge pier.	en_US
dc.relation.ispartof	Proceedings of the 34th Hydrology and Water Resources Symposium, HWRS 2012	en_US
dc.title	PIV study of turbulent flow around a circular bridge pier using fractal scaling	en_US
dc.type	Conference Proceeding
utslib.for	0905 Civil 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. The flow structure around a bridge pier is complicated, particularly in the flow immediately downstream of a bridge pier. In the study reported herein, the fractal dimensions of velocity fluctuations (u, v) were investigated. Two dimensional velocity fluctuations at horizontal surface were measured using Particle Image Velocimetry (PIV). At each horizontal surface, 700 pairs of images were captured at a frequency of 15 Hz. The time interval between two frames in a pair of captured frames was 10 m seconds. The fractal dimensions were computed using a Fractal Interpolation Function (FIF) algorithm. From the results, it was found that the fractal dimensions fluctuated significantly in the streamwise and transverse flow directions in the vicinity of the pier. A symmetrical pattern of the fractal dimension was found at the rear of the bridge pier. Furthermore, it was found that the fractal dimensions of velocity fluctuations increased rapidly at vicinity of pier at downstream whereas it decreased far from the pier. Therefore, it can be concluded that the fractal dimension using FIF well describes the flow structure around bridge pier.

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http://hdl.handle.net/10453/31533