Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
ANALYSIS OF WAVE OVERTOPPING ON AN IMPERMEABLE COASTAL STRUCTURE USING A RANS-VOF NUMERICAL MODEL
Submission Author:
Gabriela Carré dos Santos , RS , Brazil
Co-Authors:
Gabriela Carré dos Santos, Paulo Teixeira, Eric Didier
Presenter: Gabriela Carré dos Santos
doi://10.26678/ABCM.COBEM2019.COB2019-0525
Abstract
The global warming is responsible for increasing the sea level and, consequently, can cause overtopping on coastal structures. The prediction of this phenomenon is difficult because involves turbulence, wave breaking and run-up. The objective of this study is to analyze numerically the wave overtopping on coastal structures by using the FLUENT® numerical model, which is based on Reynolds-Averaged Navier-Stokes equations (RANS) and uses the Volume of Fluid method (VoF) to track the interface between water and air. Influences of mesh size, turbulence model (k- and k- SST) and bottom condition (slip and no-slip) are investigated in a flume with an impermeable breakwater at its end. Two cases with different heights of incident regular waves are tested. In general, the free surface elevations up to the breakwater obtained by different conditions are very similar for both incident waves. However, the overtopping volumes have shown important differences. Results will be compared with those obtained by SPHyCE, a Smoothed Particle Hydrodynamics model based on Navier-Stokes equations.
Keywords
breakwater, overtopping, wave-structure interaction, CFD simulation, RANS-VoF
