An efficient solver for nearshore flows based on the WAF method

Brocchini, Maurizio; Bernetti, R.; Mancinelli, Alessandro; Albertini, G.

doi:10.1016/s0378-3839(01)00009-6

Cited by 95 publications

(82 citation statements)

References 21 publications

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“…NSWMs possess some distinctive advantages that make them very suitable for modelling flows occurring in shallow depths (Brocchini et al, 2001). We perform our study with the nonlinear shallow-water wave model.…”

Section: Tsunami Modellingmentioning

confidence: 99%

Tsunami hazard assessment in the Ionian Sea due to potential tsunamogenic sources – results from numerical simulations

Tselentis

Stavrakakis

Sokos

et al. 2010

Nat. Hazards Earth Syst. Sci.

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Abstract. In spite of the fact that the great majority of seismic tsunami is generated in ocean domains, smaller basins like the Ionian Sea sometimes experience this phenomenon. In this investigation, we study the tsunami hazard associated with the Ionian Sea fault system.A scenario-based method is used to provide an estimation of the tsunami hazard in this region for the first time. Realistic faulting parameters related to four probable seismic sources, with tsunami potential, are used to model expected coseismic deformation, which is translated directly to the water surface and used as an initial condition for the tsunami propagation.We calculate tsunami propagation snapshots and mareograms for the four seismic sources in order to estimate the expected values of tsunami maximum amplitudes and arrival times at eleven tourist resorts along the Ionian shorelines.The results indicate that, from the four examined sources, only one possesses a seismic threat causing wave amplitudes up to 4 m at some tourist resorts along the Ionian shoreline.

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Section: Tsunami Modellingmentioning

confidence: 99%

Tsunami hazard assessment in the Ionian Sea due to potential tsunamogenic sources – results from numerical simulations

Tselentis

Stavrakakis

Sokos

et al. 2010

Nat. Hazards Earth Syst. Sci.

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“…Runup of long waves on beaches of complicated bathymetry is studied numerically, mainly in the framework of shallow-water theory, see for instance (Zelt, 1986, Liu et al, 1995OzkanHaller and Kirby, 1997;Titov and Synolakis, 1997;Brocchini et al, 2001). It is also the case that the wave field has large variability in temporal and spatial scales, especially with different near-shore conditions, where full 3-D flow characteristics appear.…”

Section: Introductionmentioning

confidence: 99%

Two- and three-dimensional computation of solitary wave runup on non-plane beach

Choi

Pelinovsky

Kim

et al. 2008

Nonlin. Processes Geophys.

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Abstract. Solitary wave runup on a non-plane beach is studied analytically and numerically. For the theoretical approach, nonlinear shallow-water theory is applied to obtain the analytical solution for the simplified bottom geometry, such as an inclined channel whose cross-slope shape is parabolic. It generalizes Carrier-Greenspan approach for long wave runup on the inclined plane beach that is currently used now. For the numerical study, the Reynolds Averaged Navier-Stokes (RANS) system is applied to study soliton runup on an inclined beach and the detailed characteristics of the wave processes (water displacement, velocity field, turbulent kinetic energy, energy dissipation) are analyzed. In this study, it is theoretically and numerically proved that the existence of a parabolic cross-slope channel on the plane beach causes runup intensification, which is often observed in post-tsunami field surveys.

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“…where c τ is the dimensionless Chezy friction coefficient, usually of order 10 −2 -10 −3 [38]. For the purposes of our simulations, c τ is computed as a function of the initial water depth, using the formulation proposed by van Rijn [39] in case of a hydraulically rough flow:…”

Section: The Nonlinear Shallow Water Equations: the Analyticsmentioning

confidence: 99%

Waves and Currents at a River Mouth: The Role of Macrovortices, Sub-Grid Turbulence and Seabed Friction

Melito

Postacchini

Darvini

et al. 2018

Water

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Abstract:Numerical experiments of wave-current interaction have been performed to investigate the evolution and dissipation of horizontal large-scale vortical structures generated by differential wave breaking and current shearing at river mouths. Specific focus is on the role played by turbulence of scales smaller than the water depth and by seabed friction on the dissipation of the mentioned macrovortices. The analysis reveals two regions of turbulence generation: at the river mouth, and along the curved seaward boundary of the shoal. In the latter zone, macrovortices are formed due to differential wave breaking induced by the sudden variation in water depth and enhanced by opposing currents which favour wave steepening. Such vortices are then advected towards the shore. Among the dissipative mechanisms, dissipation induced by seabed friction is deemed dominant, in particular in the most shallow waters of the shoal. Sub-grid turbulence dissipation, conversely, is more efficient offshore, although exerting some effect also over the shoal when supported by the continuous action of waves.

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An efficient solver for nearshore flows based on the WAF method

Cited by 95 publications

References 21 publications

Tsunami hazard assessment in the Ionian Sea due to potential tsunamogenic sources – results from numerical simulations

Tsunami hazard assessment in the Ionian Sea due to potential tsunamogenic sources – results from numerical simulations

Two- and three-dimensional computation of solitary wave runup on non-plane beach

Waves and Currents at a River Mouth: The Role of Macrovortices, Sub-Grid Turbulence and Seabed Friction

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