American Society of Civil Engineers


Particle Image Velocimetry Applied to a Deflected Wall Jet


by P. R. Onyshko, (Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada), M. R. Loewen, (Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada), and N. Rajaratnam, (Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada)
Section: Poster Session, pp. 1-10, (doi:  http://dx.doi.org/10.1061/40655(2002)113)

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Document type: Conference Proceeding Paper
Part of: Hydraulic Measurements and Experimental Methods 2002
Abstract: This paper presents the results of an experimental study of a deflected wall jet using particle image velocimetry (PIV). The challenges inherent to successfully applying PIV to a flow with a wide velocity range and over a large area are discussed. Deflected wall jets are of interest at the outlets of dams and other hydraulic structures for their potential to reduce the risk of structural collapse due to bed erosion. A high-velocity wall jet can be deflected away from the bed and towards the water surface using a baffle installed on the bed. In this study, a plane wall jet was formed in a rectangular flume with a self-contained re-circulating water supply and deflected upwards by a baffle affixed across the width of the flume bed. The flow field was contained within a 60.0 cm square field of view centred 65.0 cm from the gate. This large area was subdivided into fourteen tesserae, each with 15.75 cm square fields of view. The resulting PIV data was subsequently assembled into a data mosaic covering the entire region of interest.


ASCE Subject Headings:
Imaging techniques
Jets (fluid)
Particles