In this paper, the large eddy simulation (LES) model introduced in smoothed particle hydrodynamics (SPH) by Di Mascio et al. [Phys. Fluids 29, 035102 (2017)] and called δ-LES-SPH, is extended to treat multiphase flows. This achieved modifying δ-SPH Hammani [Comput. Methods Appl. Mech. Eng. 368, 113189 (2020)] switching viscous density diffusion constants dynamic variables evaluated as turbulence closure terms. The equation for energy conservation also written presented model. validation...

This paper presents new physical model experiments on tsunamis generated by landslides at the coast of a conical island. The have been carried out in large wave tank; radius island coastline and falling height landslide varied during experimental campaign. is reproduced solid body shaped as half an ellipsoid. Tsunami runup measured using special gauges; detailed analysis along presented, with attention to role each packet evolution envelope first group waves.

We present the modeling of main facets turbulence diffusion, i.e., diffusion momentum, mass, density, and heat, within smoothed particle hydrodynamics (SPH) method. The treatment is developed considering large eddy simulation (LES) approach specifically founded on δ-LES-SPH [A. Di Mascio et al., Phys. Fluids 29, 035102 (2017)], a model characterized by closure for continuity equation. novelties introduced are advection–diffusion equation through turbulent mass diffusivity internal energy...

This study presents a comparative analysis between Smoothed Particle Hydrodynamics (SPH) and Finite Volume Methods (FVMs) in simulating highly turbulent flows, focusing on three-dimensional marine propeller jet case. The mesh-free particle-based approach the grid-based one are evaluated for their ability to resolve complex flow structures, such as tip vortices, wake dynamics, turbulence-induced instabilities. paper highlights well-established computational framework of FVM while addressing...

Abstract The present study deals with numerical simulations of the free and submerged hydraulic jumps over different shapes roughness in various arrangements Froude number conditions. models were studied using three shapes, i.e. triangular, square semi-oval for 0.2 < T/I 0.5, where T I are height distance roughness, respectively. results showed that model is fairly well able to simulate jump characteristics. effect plays a role reduction relative maximum velocity which greater jump....

The submerged hydraulic jump is a sudden change from the supercritical to subcritical flow, specified by strong turbulence, air entrainment and energy loss. Despite recent studies, characteristics in smooth rough beds, mean velocity flow patterns cavity region of especially case triangular macroroughnesses, are not completely understood. objective this paper was numerically investigate via FLOW-3D model effects macroroughnesses on jump, including longitudinal profile streamlines, region,...

This paper deals with the development of a 2D weakly compressible SPH model to simulate wave pressures acting on vertical and slotted coastal structures. Attention is devoted investigate diffusive term in continuity equation order smooth out high-frequency numerical noise pressure field. A hybrid formulation based two literature models proposed. The interaction between regular waves perforated breakwaters analyzed time, space, frequency domain. Numerical results are compared laboratory...

The reduction of wave run-up induced by solitary waves at sloping beaches, means submerged barriers has been investigated. To this purpose, 198 laboratory tests were undertaken in the channel University Calabria, adopting three beach slopes, water depths and square rectangular rigid type-barriers. make comparisons on performance reducing run-up, 99 carried out considering same experimental conditions, without barriers. Two approaches used to deduce resulting presence starting from knowledge...

Calabria is a region of southern Italy characterized by several natural and heritage sites located on seaboard areas, within distance 300 m from the coast. In fact, 58 Natura 2000 63 cultural (42.9% which overlap with ones) fall borders region. Within this context, study has analyzed connection between goods in region, considering both human impact risk conditions. The results evidenced that 50% 21% sites, respectively, are exposed to increasing coastal erosion heavy impact. Moreover, order...

An extensive full-scale laboratory investigation on a two-dimensional physical model of beach drainage system (BDS) was performed at "Grosser Wellen-Kanal" Hannover, Germany. This research deals with the hydrodynamic aspects equipped BDS, while morphodynamic study are discussed in companion paper. Knowledge both and behaviours drained allows definition main design criteria. The adopted BDS constituted by four corrugated pipes. Several drain configurations static dynamic conditions were...

This research describes a unique set of experiments undertaken at the Large Wave Channel (Hannover) aimed to study morphodynamic behaviour beach face containing buried drainage system. The advantage using large wave flume is that scale effects affected previous laboratory are minimized. compares response undrained under controlled forcing with drained one same action. Low, medium and high levels energy were used for experiments, significant heights 0.39–0.83 m steepnesses between 0.004...