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4 January 2024 Numerical Study on Early Sand Movement in Front of a Coastal Revetment Using the NWT-DEM Two-Way Coupled Model
Yeon-Myeong Jeong, Ho-Seong Jeon, Yeong-Han Jeong, Dong-Soo Hur
Author Affiliations +
Abstract

Jeong, Y.-M.; Jeon, H.-S.; Jeong, Y.-H., and Hur, D.-S., 2023. Numerical study on early sand movement in front of a coastal revetment using the NWT-DEM two-way coupled model. In: Lee, J.L.; Lee, H.; Min, B.I.; Chang, J.-I.; Cho, G.T.; Yoon, J.-S., and Lee, J. (eds.), Multidisciplinary Approaches to Coastal and Marine Management. Journal of Coastal Research, Special Issue No. 116, pp. 51-55. Charlotte (North Carolina), ISSN 0749-0208.

The two-way coupled analysis of a particle method and a wave field model was conducted to examine numerically the characteristics of early sand movement in front of a coastal revetment. The coupled model used in this study can not only consider the interaction among the wave, coastal revetement, and ground but also represent early sand movement in front of coastal revetment under waves. The validity and usefulness of a particle method of Discrete Element Method (DEM) was ensured by comparing angle of repose for quartz sand with the results of a hydraulic experiment. The early sand movement occurring in front of coastal revetment was numerical compared using the two-way coupled model with early sand behavior amount caused by the reflected wave and the interaction between the wave, coastal revetment, and ground. In general, as the exposure of the coastal revetment to the waves increases, the scour depth in front of the structure increases. The maximum scour depth increases by 9 to 150% depending on the locations of the coastal revetments considered in this study. Moreover, the active sand movement in front of coastal revetment and the exposure and leakage of the terrain base at large scour depths can ultimately cause collapse and safety problems. Thus, the wave-particle interaction analysis of this study can be a numerical analysis for examining safety owing to sand movements caused by waves in front of coastal revetment.

Yeon-Myeong Jeong, Ho-Seong Jeon, Yeong-Han Jeong, and Dong-Soo Hur "Numerical Study on Early Sand Movement in Front of a Coastal Revetment Using the NWT-DEM Two-Way Coupled Model," Journal of Coastal Research 116(sp1), 51-55, (4 January 2024). https://doi.org/10.2112/JCR-SI116-011.1
Received: 6 March 2023; Accepted: 21 April 2023; Published: 4 January 2024
KEYWORDS
coastal revetment
Discrete Element Method (DEM)
early sand movement
Numerical Wave Tank (NWT)
reflected wave
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