SUMMARY In this paper, an in‐depth study of SPH method, in its original weakly compressible version, is achieved on dedicated 2D and 3D free‐surface flow test cases. These rather critical prototype problems shall constitute suitable cases to get through when building a model. The present work aims at investigating various numerical aspects often little mentioned literature. particular, great care paid the dynamic part solution, which local hydrodynamic load prediction. role errors...

The water-shipping problem is modelled in a two-dimensional framework and studied experimentally numerically for the case of fixed barge-shaped structure. analysis represents second step research discussed Greco et al . ( J. Fluid Mech. , vol. 525, 2005, p. 309). numerical investigation performed by using both boundary element method domain-decomposition strategy. model tests highlight occurrence dam-breaking-type water on deck, ) with b without an initial plunging phase, c unusual type...

The flip-through phenomenon has been observed in several conditions characterized by a steep wave approaching vertical wall (Peregrine 2003). One of the cases where this and studied experimentally is sloshing partially filled tank. This case described Lugni et al. (2006) Faltinsen Timoka (2009). Those experiments detail features dynamics with an ad hoc distributions miniaturized pressure sensors records fast video-camera. Here, same flow have reproduced numerically improved SPH method...

A domain-decomposition algorithm has been developed to handle two-phase flows with large deformation, breaking and fragmentation of the interface. The strategy couples a boundary element method Navier–Stokes solver combined level-set technique for tracking former is used in fluid region where interface can be modelled as smooth surface. In rest domain field applied. This results an efficient accurate method. this paper, features are described challenges connected coupling deeply discussed....

A numerical method is developed for modeling the violent motion and fragmentation of an interface between two fluids. The flow field described through solution Navier-Stokes equations both fluids (in this case water air), captured by a Level-Set function. Particular attention given to interface, where most approximations are made. Novel features that reintialization procedure has been redefined in cells crossed interface; density smoothed across using exponential function obtain equally...

SUMMARY A 3D Domain‐Decomposition (DD) strategy has been developed to deal with violent wave‐ship interactions involving water‐on‐deck and slamming occurrence. It couples a linear potential flow seakeeping solver Navier–Stokes method. The latter is applied in an inner domain where slamming, water‐on‐deck, free surface fragmentation may occur, important nonlinearities. field combines approximated projection method level set technique for the evolution. hybrid strategy, combining Eulerian...

The present work extends the semi-integrated method proposed by Antuono and Brocchini [“Beyond Boussinesq-type equations: Semi-integrated models for coastal dynamics,” Phys. Fluids 25(1), 016603 (2013)], which comprises a subset of depth-averaged equations (similar to Boussinesq-like models) Poisson equation that accounts vertical dynamics. Here, has been reshaped in conservative-like form both formulations (2013)] are investigated: former uses velocity component (formulation A) latter...

SUMMARY The problem of a high‐pressure gas cavity and its interaction with surrounding liquid close‐by structure is examined numerically. Even though this interest in many practical applications, here, the focus on an underwater explosion. A one‐way DD strategy coupling radial 3D solver for compressible multiphase flows proposed, different components are successfully validated. This time‐space DD, which assumes explosion that occurs sufficiently far from boundaries. It means solution used...

The hydroelastic interaction between an underwater explosion and elastic plate is investigated num- erically through a domain-decomposition strategy. three-dimensional features of the problem require large computational effort, which reduced weak coupling one-dimensional radial blast solver, resolves evolution far from boundaries, compressible flow solver used where interactions compression wave boundaries take place becomes three-dimensional. at directly coupled with modal structural that...

This research activity represents the logical continuation of work documented in [1] and [2] on water deck parametric roll for an FPSO regular waves. Here same numerical method, based a domain-decomposition strategy, is used to examine platform with bilge keels, both without mooring-line system. It found that keels length 40% ship breadth 3% limit effectively when instability promoted by vertical bow motions In these conditions also amount shipped substantially reduced. Large induced...

The flow around an oscillating cylinder close to a horizontal solid boundary is studied gather information about the load acting on pipelines, while they are laid sea bottom. problem simplified assuming that pipeline section rigid and oscillates harmonically only in normal-to-seabed direction so can be tackled two dimensions. A computational fluid dynamics (CFD) solver used take into account viscous effects hypothesis of laminar conditions. This best suits conditions layering when Reynolds...

The present work completes the validation of depth-semi-averaged model defined in Antuono et al. [“A depth semi-averaged for coastal dynamics,” Phys. Fluids 29, 056603 (2017)] providing a numerical implementation three spatial dimensions. In particular, is aimed at describing wide variety phenomena typical region, as example nonlinear interaction between waves and bottom bathymetry (diffraction/refraction phenomena), dispersion effects, beach inundation. To this purpose, proposed scheme...