Numerical simulation of regular and random waves and Wave-induced currents around detached breakwaters

摘要

This paper describes the effect of various parameters on detachedrnbreakwaters by means of a time-domain Boussinesq type model, which isrnextended to the surf zone and swash zone by including a simple descriptionrnof wave breaking and a moving boundary at the shoreline. The model isrnapplied to investigate the cross-shore motion of regular waves around arndetached breakwater including shoaling and wave breaking. This paper alsornincludes a discussion of time averaged quantities derived from the timedomainrnsolutions. The present paper focuses on the wave height, wavernbreaking and wave-induced currents around a detached breakwater. This isrndone without the traditional splitting of the phenomenon into the wave andrncurrent problems. In this numerical test, a detached breakwater parallel tornthe shoreline is presented. In this situation, wave-driven currents arerngenerated and circulation cells appear behind breakwater. In turn, therncurrents appear to affect the waves. Results are presented for the case ofrnunidirectional and directional. Effective parameters such as wavernparameters, wave steepness, incident wave angle, distance from shoreline,rnbreakwater length, distance between breakwaters and bed slope are alsorninvestigated in this study. The numerical results are finally compared withrnthe experimental data.