Author(s): Nima Ikani; Jaan H. Pu; Kavian O. Cooke
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Keywords: No Keywords
Abstract: The aim of this investigation was to determine the complex effect of three square-bridge piers on turbulence structures and vortice behaviour, which is still a research gap in understanding complex flow dynamics. Its novelty is to enhance understanding of how complex bridge piers contribute to the development of turbulence. The experiment was conducted in a smooth bed within a clear-water open channel flow by utilising Acoustic Doppler Velocimeters (ADV) to determine variations in the flow’s turbulent structural dynamics along longitudinal, transverse, and vertical axes. Flow patterns after piers were examined, and average velocities and Reynolds shear stresses (RSS) were studied along with bursting analysis. It was found that each pier was followed by strong reversal velocities, which led to persistent vortices near the wake. In particular, the inter-pier gap significantly impacts flow dynamics, as evidenced by the occurrence of reverse flow, sweep, and ejection events, particularly in the vicinity of the leading pier.
Year: 2024