Periodic Lagrangian Coherent Structures around a tidal inlet

Annalisa De Leo, Francesco Enrile, Alessandro Stocchino

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

We present an extensive experimental campaign dedicated to the identification of coherent trajectory patterns owing to flow occurring in tidal environments, characterized by a tidal inlet and a channel with lateral tidal flats. Single and multiple harmonics tides are here reproduced on a large-scale physical model. The study of the large scale macro-vortices, generated by vortex shedding during the flood phase from the inlet barrier, is performed employing the Lagrangian Average Vorticity Deviation (LAVD). The presence of large-scale vortices with a complex dynamics within a tidal period suggested a deeper understanding on the possible environmental implications in terms of transport connections or barriers. Finite Time Lyapunov Exponents are employed in order to recognize stable and unstable manifolds within the flow that are defined as preferred paths along which particles are repelled (forward integration) or attracted (backward).

Original languageEnglish
Article number959304
JournalFrontiers in Marine Science
Volume9
DOIs
Publication statusPublished - 18 Aug 2022

Keywords

  • coastal macrovortices
  • Lagrangian Coherent Structures
  • tidal flows
  • tidal inlet
  • water quality

ASJC Scopus subject areas

  • Oceanography
  • Global and Planetary Change
  • Aquatic Science
  • Water Science and Technology
  • Environmental Science (miscellaneous)
  • Ocean Engineering

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