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Article

Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes

1
Disaster Prevention & Water Environment Research Center, National Yang Ming Chiao Tung University, 1001 University Road, Hsinchu City 30010, Taiwan
2
National Center for Computational Hydroscience and Engineering, University of Mississippi, 2301 S. Lamar Blvd, Oxford, MS 38655, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Vlassios Hrissanthou
Water 2021, 13(11), 1462; https://doi.org/10.3390/w13111462
Received: 21 January 2021 / Revised: 14 May 2021 / Accepted: 21 May 2021 / Published: 23 May 2021
(This article belongs to the Special Issue Research on Hydraulics and River Dynamics)
Local scour is a common threat to structures such as bridge piers, abutments, and dikes that are constructed on natural rivers. To reduce the risk of foundation failure, the understanding of local scour phenomenon around hydraulic structures is important. The well-predicted scour depth can be used as a reference for structural foundation design and river management. Numerical simulation is relatively efficient at studying these issues. Currently, two-dimensional (2D) mobile-bed models are widely used for river engineering. However, a common 2D model is inadequate for solving the three-dimensional (3D) flow field and local scour phenomenon because of the depth-averaged hypothesis. This causes the predicted scour depth to often be underestimated. In this study, a repose angle formula and bed geometry adjustment mechanism are integrated into a 2D mobile-bed model to improve the numerical simulation of local scour holes around structures. Comparison of the calculated and measured bed variation data reveals that a numerical model involving the improvement technique can predict the geometry of a local scour hole around spur dikes with reasonable accuracy and reliability. View Full-Text
Keywords: numerical simulation; local scour; spur dike; angle of repose numerical simulation; local scour; spur dike; angle of repose
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MDPI and ACS Style

Liao, C.-T.; Yeh, K.-C.; Lan, Y.-C.; Jhong, R.-K.; Jia, Y. Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes. Water 2021, 13, 1462. https://doi.org/10.3390/w13111462

AMA Style

Liao C-T, Yeh K-C, Lan Y-C, Jhong R-K, Jia Y. Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes. Water. 2021; 13(11):1462. https://doi.org/10.3390/w13111462

Chicago/Turabian Style

Liao, Chung-Ta, Keh-Chia Yeh, Yin-Chi Lan, Ren-Kai Jhong, and Yafei Jia. 2021. "Improving the 2D Numerical Simulations on Local Scour Hole around Spur Dikes" Water 13, no. 11: 1462. https://doi.org/10.3390/w13111462

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