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Flow Dynamics and Local Scour Around Seabed-Mounted Artificial Reefs: A Case Study from Torbay, UK

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Publicado en:Journal of Marine Science and Engineering vol. 13, no. 8 (2025), p. 1425-1451
Autor principal: Bordbar Amir
Otros Autores: Knir Jakub, Kelefouras Vasilios, Hickling Samuel John Stephen, Short, Harrison, Chu, Lee Yeaw
Publicado:
MDPI AG
Materias:
Marine environment
Tidal currents
Shear stress
Hydrodynamics
Fluid dynamics
Sediment transport
Fluid flow
Shear flow
Influence
Ocean floor
Artificial reefs
Flow pattern
Flow simulation
Turbulence models
Shoreline protection
Flow distribution
Site selection
Software
Scouring
Turbulence
Investigations
Flow velocity
Soil erosion
Ocean bottom
Reynolds averaged Navier-Stokes method
Cubes
Bottom stress
Tidal flow
Velocity
K-omega turbulence model
Design
Scour
Computational fluid dynamics
Environmental
Acceso en línea:Citation/Abstract
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Resumen:This study investigates the flow dynamics and local scour around a Reef Cube® artificial reef deployed in Torbay, UK, using computational fluid dynamics. The flow is modelled using Reynolds-Averaged Navier–Stokes (RANS) equations with a k-ω SST turbulence model. A novel hydro-morphodynamic model employing the generalized internal boundary method in HELYX (OpenFOAM-based) is used to simulate scour development. Model performance was validated against experimental data for flow fields, bed shear stress, and local scour. Flow simulations across various scenarios demonstrated that parameters such as the orientation angle and arrangement of Reef Cubes significantly influence flow patterns, bed shear stress, and habitat suitability. The hydro-morphodynamic model was used to simulate scouring around a reef cube in the Torbay marine environment. Results indicate that typical tidal flow velocity flow in the region is barely sufficient to initiate sediment motion, whereas extreme flow events, represented by doubling the mean flow velocity, significantly accelerate scour development, producing holes up to ten times deeper. These findings underscore the importance of considering extreme flow conditions in scour analyses due to their potential impact on the stability and failure risk of AR projects.
ISSN:2077-1312
DOI:10.3390/jmse13081425
Fuente:Engineering Database