Understanding Sediment Dynamics at a Shipwreck Site Using CFD Modelling

Gary Littler, Mark Coughlan, Jan Majcher, Jennifer Keenahan, Angelo Aloisio (Editor), Said Quqa (Editor), Pier Francesco Giordano (Editor), Luke J. Prendergast (Editor), Jesus Martinez-Frias (Editor)

Research output: Contribution to journalArticlepeer-review

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Abstract

Shipwrecks are important cultural heritage sites offshore. In many instances, given their often long-term emplacement on the seafloor, they offer natural laboratories to study complex interactions between human-induced obstacles and seabed dynamics. Such interactions and induced sediment mobility also pose significant threats to offshore engineering infrastructure, such as turbine monopile foundations. Traditional methods can struggle to capture the nuance of these processes, with real-world surveys measuring effects only after installation, and laboratory models suffering from scale-down inaccuracies. Computational fluid dynamics (CFD) modelling offers an effective means of investigating the effects of obstacles on seabed dynamics, and by using shipwrecks as proxies for infrastructure, it can utilize long-term datasets to verify its predictions. In this study, high-resolution temporal bathymetric data were used in, and to verify, CFD modelling to investigate the interactions between hydro- and sediment dynamics at a shipwreck site in a tidally dominated wreck site. From this comparison, simulations of bed shear stress and scalar transport correlate well with known areas of erosion and deposition, serving as a basis for future scour prediction studies and creating effective tools in offshore renewable infrastructure planning and de-risking.
Original languageEnglish
Article number369
JournalGeosciences
Volume12
Issue number10
Early online date7 Oct 2022
DOIs
Publication statusPublished online - 7 Oct 2022

Keywords

  • Article
  • scour
  • morphodynamics
  • hydrodynamics
  • CFD modelling
  • shipwrecks
  • offshore wind

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