Computations of overturning waves

New, Adrian L.; McIver, P.; Peregrine, D. H.

doi:10.1017/s0022112085000118

Cited by 111 publications

(67 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Once generated, waves closely behave as irrotational inviscid flows, well simulated by potential flow theory up to overturning (New et al 1985;Grilli 1997;Dommermuth et al 1998). [Note, when using fully nonlinear free surface boundary conditions, one refers to these models as "Fully Nonlinear Potential Flow" models (FNPF).]…”

Section: Introductionmentioning

confidence: 83%

Modeling of Wave-Induced Sediment Transport Around Obstacles

Grilli

Harris²,

Greene³

2009

Coastal Engineering 2008

View full text Add to dashboard Cite

We report on further developments of a hybrid numerical model to simulate wave-induced sediment transport. A 2D numerical wavetank (NWT) based on fully nonlinear potential flow (FNPF) equations is used to simulate fully nonlinear wave generation and propagation. A 3D Navier-Stokes model with large eddy simulation (LES) is coupled to the NWT to simulate complex turbulent flows near the ocean bottom or around obstacles. Wave kinematics in the 2D-NWT thus forces flow simulations in the 3D-NS-LES model, and resulting sediment transport over the seabed and around a partially buried obstacle. The latter is calculated in a non-cohesive suspended load transport model simulating the (scalar) sediment concentration, using a constant settling velocity. The 2D NWT is based on a higher-order boundary element method (BEM), with explicit 2nd-order time stepping. The computational grid, thus, is the 2D-NWT boundary and the 3D-LES near-field domain. In the present new formulation, the total velocity and pressure fields are expressed as the sum of irrotational (incident/far-field) and near-field viscous perturbations. The LES equations are formulated and solved for the perturbation fields only, which are forced by the incident fields computed in the NWT. The feasibility of coupling the models in an efficient manner is demonstrated.

show abstract

Section: Introductionmentioning

confidence: 83%

Modeling of Wave-Induced Sediment Transport Around Obstacles

Grilli

Harris²,

Greene³

2009

Coastal Engineering 2008

View full text Add to dashboard Cite

show abstract

“…The earlier researchers focused on 2D problems with a relatively simple computational domain, i.e. in deep water [33] and/or in a spatially periodic domain [34][35]. However, in the real sea, the seabed effects could be very evident and the spatially periodic problems are rare to see.…”

Section: Introductionmentioning

confidence: 99%

QALE‐FEM for modelling 3D overturning waves

Yan

2009

Numerical Methods in Fluids

View full text Add to dashboard Cite

This is the accepted version of the paper.This version of the publication may differ from the final published version. based on a fully nonlinear potential theory is presented in this paper. This development enables the QALE-FEM to deal with 3D (three dimensional) overturning waves over complex seabeds, which have not been considered since the method was devised by the authors of this paper in their previous works [1][2]. In order to tackle challenges associated with 3D overturning waves, two new numerical techniques are suggested. Permanent repository linkThey are the techniques for moving the mesh and for calculating the fluid velocity near overturning jets, respectively. The developed method is validated by comparing its numerical results with experimental data and results from other numerical methods available in the literature. Good agreement is achieved. The computational efficiency of this method is also investigated for this kind of wave, which shows that the QALE-FEM can be many times faster than other methods based on the same theory. Furthermore, 3Doverturning waves propagating over a non-symmetrical seabed or multiple reefs are simulated using the method. Some of these results have not been found elsewhere to the best of our knowledge.

show abstract

“…Ces efforts importants de recherche ont abouti à une meilleure connaissance de l'écoulement avant impact et dans la zone de surf dite «interne» quelques mètres au~delà de ce dernier. Dans le premier cas, l'écoulement est irrotationnel et le domaine liquide simplement connexe, autorisant le développement de modèles théoriques ou numériques reposant sur l'approximation du fluide parfait (voir par exemple New et al, 1985). Dans le second cas, l'écoulement est quasi-stationnaire (analogie avec un ressaut hydraulique propagatif) et la turbulence bien développée autorisant cette fois l'emploi de modèle statistique de turbulence (voir par exemple Svendsen & Madsen, 1984).…”

Section: Introductionunclassified

Modélisation numérique de l'écoulement généré par un déferlement plongeant

Abadie¹

2000

VIèmes Journées, Caen

View full text Add to dashboard Cite

Résumé: Une modélisation numérique du déferlement par les équations de Navier-Stokes et un suivi d'interface volumique VOF-CIAM est proposée. La méthode est validée dans le cas de la propagation d'ondes non linéaires permanentes. Le déferlement plongeant sur fond plat d'une onde sinusoïdale de forte cambrure est ensuite étudié. Les caractéristiques du déferlement sont bien traduites par la méthode au moins avant l'impact où des résultats sont déjà publiés. L'intérêt des premiers résultats obtenus après l'impact justifie la démarche et encourage un travail plus systématique à partir de cet outiL Abstract: Wave breaking is simulated using the Navier-Stokes equations and the volume tracking algorithm PLIC-VOF. The method is first validated on the case of non linear wave propagation on fiat bottom. The plunging motion of a sinusoidal wave of large initial steepness is next studied. The characteristics of the wave up to the impact are found to be weIl described by the method compared to already publied results. First results obtained after the impact encourage us to go on in tms direction.

show abstract

Computations of overturning waves

Cited by 111 publications

References 3 publications

Modeling of Wave-Induced Sediment Transport Around Obstacles

Modeling of Wave-Induced Sediment Transport Around Obstacles

QALE‐FEM for modelling 3D overturning waves

Modélisation numérique de l'écoulement généré par un déferlement plongeant

Contact Info

Product

Resources

About