Wave–Current Interaction: A 2DH Model for Turbulent Jet and Bottom-Friction Dissipation

Pascolo, Sara; Petti, Marco; Bosa, Silvia

doi:10.3390/w10040392

Cited by 19 publications

(15 citation statements)

References 37 publications

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“…The hydrodynamic model is based on classical 2DH shallow water equations, which include: turbulent fluxes treated according to the Smagorinsky approach as in the study of Pascolo et al [38], the forcings due to wind shear stress and radiation stress, and the mean bottom shear stress, which is influenced by both current and wave motion as pointed out by Soulsby [39,40]. The resulting differential equation system is integrated with a finite volume method which is able to represent phenomena such as the propagation of water front over a dry bed, which regularly occurs in lagoons and coastal environments at each tidal cycle, with the submergence and emergence of saltmarshes and beaches.…”

Section: Numerical Model and Computational Domainsmentioning

confidence: 99%

An Integrated Approach to Study the Morphodynamics of the Lignano Tidal Inlet

Petti

Bosa

Pascolo

et al. 2020

JMSE

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The morphological evolution of a tidal inlet is the combined result of tides and wind waves, which interact in a non-linear manner and over very different time-scales. Likewise, the presence of maritime structures built in the vicinity of the tidal inlet, for coastal or port defense or to stabilize the inlet itself, can greatly affect this dynamic equilibrium, changing erosional and depositional patterns of the adjacent shoreline. In this study, the narrowing phenomenon of the Lignano tidal inlet subsequent to the construction of the related port, is examined through an integrated approach in order to propose and verify a possible form of evolution. This approach is the result of the combination of three methods: the historical reconstruction of the shifting of the coastline, an empirical scheme which describes the qualitative morphology of a mixed-energy tidal inlet, and a process-based morphodynamic modeling, which adopts a bi-dimensional depth averaged (2DH) approach. The application of numerical modeling has required the definition of a reduced input set of data representing an average year, in particular for wind and tidal conditions, including the meteorological component. The magnitude and the directions of the simulated dominant sediment transport are coherent with real processes both from a qualitative and a quantitative point of view.

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Section: Numerical Model and Computational Domainsmentioning

confidence: 99%

An Integrated Approach to Study the Morphodynamics of the Lignano Tidal Inlet

Petti

Bosa

Pascolo

et al. 2020

JMSE

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“…The morphological-hydrodynamic model has first been validated assuming fixed bottom against numerical tests and experimental data, both alone and coupled with SWAN [43][44][45], while the sediment transport calculation was validated on the basis of laboratory experiences [46,47].…”

Section: ∂N ∂Tmentioning

confidence: 99%

Lagoon Sediment Dynamics: A Coupled Model to Study a Medium-Term Silting of Tidal Channels

Petti

Bosa

Pascolo

2018

Water

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Abstract:The silting of tidal channels is a natural process that affects several shallow lagoons and makes it difficult to navigate, requiring regular maintenance interventions. This phenomenon is the result of the complex non-linear interaction between tidal currents and wave motion. In this work, the morphodynamic evolution of the Marano and Grado lagoon is investigated by means of a two-dimensional horizontal (2DH) morphological-hydrodynamic and a spectral coupled model. An innovative procedure to reproduce the overall bathymetric changes in the medium term and, in particular, the volumes deposited inside channels, is presented. An average year with a sequence of winds and tides acting over that time was reconstructed, carrying out cross correlation techniques and spectral analyses of measured data. The predicted morphological evolution matches the annual dredged volumes in the lagoon critical branches and shows the distribution of erosion and deposition of cohesive sediments according to spatially variable values of critical shear stress.

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“…In this case, the model only solves the interaction of waves on a vertical strip under the effects of collinear currents. A different approach was followed in Reference [36], where a turbulent jet current interacting with frontal waves was investigated by means of a 2DH non-linear model based on shallow water equations. A 2DH non-linear shallow water model was also used in Reference [37] to investigate the effects of turbulence and seabed friction on macrovortices generated at a river mouth.…”

Section: Wave-current Interactionmentioning

confidence: 99%

Numerical Modelling of a Mussel Line System by Means of Lumped-Mass Approach

Pribadi¹,

Donatini²,

Lataire³

2019

JMSE

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This paper describes a numerical model to simulate the behavior of a mussel longline system, subjected to environmental loads such as waves and current. The mussel line system consists of an anchor, a mooring chain, a long backbone line, mussel collector lines and buoys. The lumped-mass open-source code MoorDyn is modified for the current application. Waves are modelled as a directional spectrum, and the current as a homogeneous velocity field with an exponential vertical distribution. A Coulomb model is implemented to model the horizontal friction between nodes and the seabed. Cylindrical buoys with three translational degrees-of-freedom are modelled by extending the simplified hydrodynamic model in use for line’s internal nodes with additional properties like cylinder height, diameter and mass. Clump weights are modelled in a similar way. For validation purposes, the results of the present software are compared with the commercially available lumped-mass based mooring dynamic software, OrcaFlex.

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Wave–Current Interaction: A 2DH Model for Turbulent Jet and Bottom-Friction Dissipation

Cited by 19 publications

References 37 publications

An Integrated Approach to Study the Morphodynamics of the Lignano Tidal Inlet

An Integrated Approach to Study the Morphodynamics of the Lignano Tidal Inlet

Lagoon Sediment Dynamics: A Coupled Model to Study a Medium-Term Silting of Tidal Channels

Numerical Modelling of a Mussel Line System by Means of Lumped-Mass Approach

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