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Flow Field in a Sloped Channel with Damaged and Undamaged Piers: Numerical and Experimental Studies

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Abstract

This paper analyzed the flow pattern around damaged and undamaged bridge piers in a channel with a mild slope. The experiments were carried out on a straight channel with a length of 12 meters and a slope of 0.008. Acoustic Doppler velocimeter (ADV) was employed to collect three-dimensional flow velocity data, and the results were analyzed and compared with particle image velocimetry (PIV) data. Sediment Simulation in Intakes with Multiblock option (SSIIM) was incorporated for the numerical simulation of the flow in this study. Generally, the results obtained from the comparisons referred to the appropriate agreement between the numerical and the experimental data. The results showed that an undular hydraulic jump occurred at a distance of two meters from the channel entrance in every case; the maximum bed shear stress in the sloped channel was 12 times that in a horizontal channel for installing two damaged and undamaged piers. With this position of the piers in the sloped channel, the upstream water level underwent a 72.5% reduction compared to similar conditions in a horizontal channel, while the amount of this water level decrease was equal to 8.3% compared to the other cases in a sloped channel. In addition, with the presence of both piers, the maximum Froude number was 5.7 times that in a horizontal channel.

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Correspondence to Omid Tayari.

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Oveici, E., Tayari, O. & Jalalkamali, N. Flow Field in a Sloped Channel with Damaged and Undamaged Piers: Numerical and Experimental Studies. KSCE J Civ Eng 25, 4240–4251 (2021). https://doi.org/10.1007/s12205-021-1511-x

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  • DOI: https://doi.org/10.1007/s12205-021-1511-x

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