3D phase-resolved wave modelling with a non-hydrostatic ocean circulation model

SIROCCO developers derived a phase-resolved wave model from an ocean circulation model SYMPHONIE for the purpose of studying wave-current effects in nearshore zones. One challenge is to adapt the circulation model to the specificities of wave physics. This mainly concerns the consideration of non-hydrostatic effects and the parametrization of wave breaking. The non-hydrostatic pressure is calculated using the artificial compressibility method (ACM). The ACM-induced errors on wave dispersion properties are examined in detail in the context of the linear theory using idealized test cases. The possible compromise between the precision achieved on non-hydrostatic physics and the adjustable CPU cost of the ACM method is looked at in detail. The modification of the wave characteristics by the bathymetric slope and the breaking of waves are then examined from a linear slope beach laboratory experiment. Finally the model is evaluated on the issue of rip currents and their feedback on the wave field using a laboratory experiment of a beach with a bar intersected by channels.

Reference: Marsaleix et al 2019, https://doi.org/10.1016/j.ocemod.2019.02.002

More news

News

Recent Publication: Variability of the Red River Plume in the Gulf of Tonkin as Revealed by Numerical Modeling and Clustering Analysis

Vietnamese and French researchers from LEGOS, LOG and VAST investigated the daily to interannual variability of the Red River plume in the Gulf of Tonkin using 6-year (2011-2016) high-resolution numerical simulations. Their results show that the temporal evolution of the plume surface coverage is correlated with runoff (with a lag), but that runoff alone cannot […]

14.02.2022

News

Recent publication : Influence of winds, geostrophy and typhoons on the seasonal variability of the circulation in the Gulf of Tonkin: A high-resolution 3D regional modeling study

Violaine Piton, Marine Herrmann, Patrick Marsaleix, Thomas Duhaut, Trin Bich Ngoc, Manh Cuong Tran, Kipp Shearman, Sylvain Ouillon; Regional Studies in Marine Science 45(6):101849 ; DOI:10.1016/j.rsma.2021.101849 The present study explores the seasonal variability of the circulation in the Gulf of Tonkin (GoT) and associated water fluxes, and identifies the driving physical processes of this circulation. […]

30.06.2021

News

Recent publication : Oxygen budget of the north-western Mediterranean deep- convection region.

Caroline Ulses, Claude Estournel, Marine Fourrier, Laurent Coppola, Faycal Kessouri, Dominique Lefevre, Patrick Marsaleix; 2021 Biogeosciences 18(3):937-960 DOI:10.5194/bg-18-937-2021 The north-western Mediterranean deep convection plays a crucial role in the general circulation and biogeochemical cycles of the Mediterranean Sea. The DEWEX (DEnse Water EXperiment) project aimed to better understand this role through an intensive observation platform […]

Search