Abstract
This paper describes 2-D numerical simulations aiming to reproduce the pressure impulse named confined-crest impact (Castellino et al., 2018), which occurs when a recurved parapet wall and non-breaking wave conditions are interacting. The simulations are carried out by using the IH2VOF and IHFOAM, the latter developed as OpenFOAM additional library. The results show a large increase of the pressures and forces value when the recurved part of the vertical parapet results completely occluded by the non-breaking wave crest. A sensitivity analysis has been carried out to study the influence of the geometrical parameters (radius r and opening angle a). It has been found a low variability with respect to the radius increase (from 1.0 m to 2.0 m) and a higher influence related to the opening angle variation. Finally, the non-dimensional force component has been represented as a function of the hydraulic and geometrical parameters by means of the dimensionless product (l/h)*s. These parameters represent the overhang extension seaward of the parapet, the water depth and the wave steepness with reference to deep-water conditions.
Highlights
OF THE ART Vertical breakwaters are a type of coastal structure used in non-breaking wave conditions to protect harbours from incoming waves
The wave structure interaction has been deeply studied for the cases of seawalls and storm walls, where the main hydrodynamic conditions are represented by breaking wave conditions
The first works that highlighted the effects of recurved walls on the total force acting on a coastal structure, due to breaking and non-breaking waves, are those of Kortenhaus et al (2002) and Kortenhaus et al (2004), which refer to the results relates to the European project EC CLASH
Summary
AND STATE OF THE ART Vertical breakwaters are a type of coastal structure used in non-breaking wave conditions to protect harbours from incoming waves (typically non-breaking). The first works that highlighted the effects of recurved walls on the total force acting on a coastal structure, due to breaking and non-breaking waves, are those of Kortenhaus et al (2002) and Kortenhaus et al (2004), which refer to the results relates to the European project EC CLASH.
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