Eulerian and Lagrangian transport by shallow-water breaking waves

Xie, Zhihua ORCID: https://orcid.org/0000-0002-5180-8427 and Lin, Pengzhi 2022. Eulerian and Lagrangian transport by shallow-water breaking waves. Physics of Fluids 34 (3) , 032116. 10.1063/5.0086434

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Abstract

This study examines the mass and Lagrangian transport, kinematic and dynamic characteristics of shallow-water breaking waves, focusing on the wave breaking, and jet impingement processes. A multiphase Navier–Stokes flow model has been developed to track the origin and trajectory for the jet and the splash-up using both a geometric piece-wise linear interface calculation volume-of-fluid (PLIC-VOF) and the Lagrangian particle tracking approaches. The model is first validated both quantitatively and qualitatively against the experimental data for the plunging jet and the splash-up during wave breaking, in which a good agreement is obtained. The mass transport and the origin of the jet and splash-up are studied using the new multi-component PLIC-VOF approach, and the different regions in the interior of the wave are tracked in an Eulerian way. Both horizontal and vertical drifts for the interior and surface particles are shown using the Lagrangian particles. The location and origin of the plunging jet can be clearly seen from the simulations. Various wave steepness and beach slopes have been investigated for different types of breakers. Furthermore, the detailed jet impingement, velocity, pressure, vorticity, and turbulence fields during wave breaking are discussed and presented, providing more detailed flow fields to gain further insight into the plunging jet and splash-up in shallow-water breaking waves.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Advanced Research Computing @ Cardiff (ARCCA) Engineering
Additional Information:	All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http:// creativecommons.org/licenses/by/4.0/).
Publisher:	American Institute of Physics
ISSN:	1070-6631
Date of First Compliant Deposit:	24 March 2022
Date of Acceptance:	2 March 2022
Last Modified:	01 Aug 2024 13:05
URI:	https://orca.cardiff.ac.uk/id/eprint/148442

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