Numerical simulations of surf zone wave dynamics using Smoothed Particle Hydrodynamics
Visualitza/Obre
10.1016/j.ocemod.2019.101481
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/177499
Tipus de documentArticle
Data publicació2019-12
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
Abstract
In this study we investigated the capabilities of the mesh-free, Lagrangian particle method (Smoothed Particle Hydrodynamics, SPH) to simulate the detailed hydrodynamic processes generated by both spilling and plunging breaking waves within the surf zone. The weakly-compressible SPH code DualSPHysics was applied to simulate wave breaking over two distinct bathymetric profiles (a plane beach and fringing reef) and compared to experimental flume measurements of waves, flows, and mean water levels. Despite the simulations spanning very different wave breaking conditions (including an extreme case with violently plunging waves on an effectively dry reef slope), the model was able to reproduce a wide range of relevant surf zone hydrodynamic processes using a fixed set of numerical parameters. This included accurate predictions of the nonlinear evolution of wave shapes (e.g., asymmetry and skewness properties), rates of wave dissipation within the surf zone, and wave setup distributions. By using this mesh-free approach, the model was able to resolve the critical crest region within the breaking waves, which provided robust predictions of the wave-induced mass fluxes within the surf zone responsible for the undertow. Within this breaking crest region, the model results capture how the potential energy of the organized wave motion is initially converted to kinetic energy and then dissipated, which reproduces the distribution of wave forces responsible for wave setup generation across the surf zone. Overall, the results reveal how the mesh-free SPH approach can accurately reproduce the detailed wave breaking processes with comparable skill to state-of-the-art mesh-based Computational Fluid Dynamics (CFD) models, and thus can be applied to provide valuable new physical insight into surf zone dynamics.
CitacióLowe, R. [et al.]. Numerical simulations of surf zone wave dynamics using Smoothed Particle Hydrodynamics. "Ocean modelling", Desembre 2019, vol. 144, p. 101481:1-101481:22.
ISSN1463-5003
Versió de l'editorhttps://www.sciencedirect.com/science/article/abs/pii/S1463500319301647
Altres identificadorshttps://arxiv.org/abs/2002.00827
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
SPH_surfzone_modelling_MANUSCRIPT_Final.pdf | 2,751Mb | Visualitza/Obre |