INTEGRATED MODELLING OF WAVES AND CURRENTS AROUNDREEF BREAKWATERS

摘要

This study aims to contribute to existing knowledge on hydraulic design of permanently submerged detached breakwaters, known also as 'reef breakwaters'. The primary purpose of reef breakwaters is to enhance wave energy dissipation through the physical mechanisms of wave breaking and friction, and this way to reduce the hydraulic loading to a required level that maintains the dynamic equilibrium of the shoreline. However, wave breaking (and associated turbulence and bottom boundary layers problems), are not understood well -research performed so far on mechanism of breaking of waves passing submerged obstacles is uncompleted, numerical models are crude. An attempt to apply an integrated approach of using a CFD - Computational Fluid Dynamics RANSE-Reynolds Averaged Navier-Stokes Equation model, in combination with some well known numerical models of waves and currents in the nearshore zone (SWAN, MIKE21) is presented in this paper.