Simulation of breaking wave by SPH method coupled with k– model Simulation des vagues déferlantes par la méthode SPH couplée à un modèle k–
نویسنده
چکیده
The paper employs a Reynolds-averaged Navier–Stokes (RANS) approach to investigate the time-dependent wave breaking processes. The numerical model is the smoothed particle hydrodynamic (SPH) method. It is a mesh-free particle approach which is capable of tracking the free surfaces of large deformation in an easy and accurate way. The widely used two-equation k–εmodel is chosen as the turbulence model to couple with the incompressible SPH scheme. The numerical model is employed to reproduce cnoidal wave breaking on a slope under two different breaking conditions—spilling and plunging. The computed free surface displacements, turbulence intensities and undertow profiles are in good agreement with the experimental data and other numerical results. According to the computations, the breaking wave characteristics are presented and discussed. It is shown that the SPH method provides a useful tool to investigate the surf zone dynamics. RÉSUMÉ L’article utilise une approche RANS pour étudier les processus de déferlement des vagues en fonction du temps. Le modèle numérique est la méthode des particules hydrodynamiques lissées (SPH). C’est une approche particulaire sans maillage qui est capable de dépister et de suivre les surfaces libres soumises à de grandes déformations, facilement et de manière précise. Le modèle à deux équations largement répandu k– est choisi comme modèle de turbulence pour être couplé avec le schéma incompressible SPH. Le modèle numérique est utilisé pour reproduire le déferlement sur une pente d’une onde cnoïdale sous deux conditions différentes de déferlement—déversant et plongeant. Les déplacements calculés de la surface libre, les intensités de turbulence et les profils du contre-courant de fond sont en bon accord avec les données expérimentales et d’autres résultats numériques. Selon les calculs, les caractéristiques des vagues déferlantes sont présentées et discutées. On montre que la méthode SPH fournit un outil utile pour étudier la dynamique des zones de ressac.
منابع مشابه
Simulation of static sinusoidal wave in deep water environment with complex boundary conditions using proposed SPH method
The study of wave and its propagation on the water surface is among significant phenomena in designing quay, marine and water structures. Therefore, in order to design structures which are exposed to direct wave forces, it is necessary to study and simulate water surface height and the wave forces on the structures body in different boundary conditions. In this study, the propagation of static ...
متن کاملNumerical investigation of free surface flood wave and solitary wave using incompressible SPH method
Simulation of free surface flow and sudden wave profile are recognized as the most challenging problem in computational hydraulics. Several Eulerian/Lagrangian approaches and models can be implemented for simulating such phenomena in which the smoothed particle hydrodynamics method (SPH) is categorized as a proper candidate. The incompressible SPH (ISPH) method hires a precise incompressible hy...
متن کاملWeakly-compressible SPH and Experimental modeling of periodic wave breaking on a plane slope
Breaking waves have ability to transport large quantities of sediment and significant impact on coastal structures morphology. Hence, modeling of wave breaking is an important subject in coastal and marine engineering. In this research, the periodic wave breaking process on a plane slope is studied experimentally and numerically. Laboratory experiments were conducted to record water surface ele...
متن کاملGPU-SPH simulation of Tsunami-like wave interaction with a seawall associated with underwater
Investigation of the waves generated by underwater disturbances gives precious insight into the effect of man-made underwater explosions as well as natural phenomena, such as underwater volcanoes or oceanic meteor impact. On the other hand, prediction of the effects of such waves on the coastal installations and structures is required for preparation worthwhile criteria for coastal engineers to...
متن کاملSimulation of Gravity Wave Propagation in Free Surface Flows by an Incompressible SPH Algorithm
This paper presents an incompressible smoothed particle hydrodynamics (SPH) model to simulate wave propagation in a free surface flow. The Navier-Stokes equations are solved in a Lagrangian framework using a three-step fractional method. In the first step, a temporary velocity field is provided according to the relevant body forces. This velocity field is renewed in the second step to include t...
متن کامل