Unstructured Finite-Volume Model of Sediment Scouring Due to Wave Impact on Vertical Seawalls

Zapata, Miguel Uh; Bang, Damien Pham Van; Nguyen, Kim Dan

doi:10.3390/jmse9121440

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…The numerical model used herein is an evolved version of the program initially developed by Uh Zapata et al, 2014 [41], to study hydrodynamics problems in irregular domains. Versions of the model have been used to study the morphodynamic evolution of sediment [20,42], including the scour around a cylindrical pier in live-bed conditions.…”

Section: Methodsmentioning

confidence: 99%

Numerical Study of the Flow and Blockage Ratio of Cylindrical Pier Local Scour

Hurtado-Herrera,

Zhang,

Hammouti

et al. 2023

Applied Sciences

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A three-dimensional large eddy simulation model is used to simulate the turbulent flow dynamics around a circular pier in live-bed and clear-water scour conditions. The Navier–Stokes equations are transformed into a σ-coordinate system and solved using a second-order unstructured triangular finite-volume method. We simulate the bed evolution by solving the Exner-Polya equation assisted by a sand-slide model as a correction method. The bedload transport rate is based on the model of Engelund and Fredsœ. The model was validated for live-bed conditions in a wide channel and clear-water conditions in a narrow channel against the experimental data found in the literature. The in-house model NSMP3D can successfully produce both the live-bed and clear-water scouring throughout a stable long-term simulation. The flow model was used to study the effects of the blockage ratio in the flow near the pier in clear-water conditions, particularly the contraction effect at the zone where the scour hole starts to form. The scour depth in the clear water simulations is generally deeper than the live-bed simulations. In clear-water, the results show that the present model is able to qualitatively and quantitatively capture the hydrodynamic and morphodynamic processes near the bed. In comparison to the wide channel situation, the simulations indicate that the scour rate is faster in the narrow channel case.

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Section: Methodsmentioning

confidence: 99%

Numerical Study of the Flow and Blockage Ratio of Cylindrical Pier Local Scour

Hurtado-Herrera,

Zhang,

Hammouti

et al. 2023

Applied Sciences

Self Cite

View full text Add to dashboard Cite

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A Laboratory Scale of the Physical Model for Inclined and Porous Breakwaters on the Coastline of Soc Trang Province (Mekong Delta)

Nguyen

et al. 2023

Water

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In the last few decades, the Mekong Delta coastlines have suffered serious erosion. Strong waves during the Northeast Monsoon are one of the main reasons for this. Many types of breakwaters with different structural components have been designed and built to mitigate coastline erosion. Vertical seawalls have been widely used, but they create reflection waves, which can generate water particle kinematics in front of the structure and increase the toe scour. In this study, an innovative block of inclined and porous breakwaters was studied by conducting laboratory-scale experiments. The experimental results show that inclined and porous breakwaters can considerably reduce wave energy due to transmission, reflection, and diffraction compared to inclined breakwaters. The porosity on the front and back sides of the structures has also been studied. Letting sediment-laden seawaters penetrate inside the sheltered zones, porous breakwaters promote accretion and facilitate the forestation of mangrove belts.

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Unstructured Finite-Volume Model of Sediment Scouring Due to Wave Impact on Vertical Seawalls

Cited by 2 publications

References 37 publications

Numerical Study of the Flow and Blockage Ratio of Cylindrical Pier Local Scour

Numerical Study of the Flow and Blockage Ratio of Cylindrical Pier Local Scour

A Laboratory Scale of the Physical Model for Inclined and Porous Breakwaters on the Coastline of Soc Trang Province (Mekong Delta)

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