Simulating three dimensional wave run-up over breakwaters covered by antifer units

• Published in: International journal of naval architecture and ocean engineering Vol. 6; no. 2; pp. 297 - 306
• Main Authors: Najafi-Jilani, A., Niri, M. Zakiri, Naderi, Nader
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-06-2014; De Gruyter Open; Elsevier; 대한조선학회
• Subjects: Antifer unit; Flow3D; Numerical simulation; Wave run-up; 조선공학; Numerical simulation; Antifer unit; Wave run-up; Flow3D
• ISSN: 2092-6782; 2092-6790
• DOI: 10.2478/IJNAOE-2013-0180

The paper presents the numerical analysis of wave run-up over rubble-mound breakwaters covered by antifer units using a technique integrating Computer-Aided Design (CAD) and Computational Fluid Dynamics (CFD) software. Direct application of Navier-Stokes equations within armour blocks, is used to provide a more reliable approach to simulate wave run-up over breakwaters. A well-tested Reynolds-averaged Navier-Stokes (RANS) Volume of Fluid (VOF) code (Flow-3D) was adopted for CFD computations. The computed results were compared with experimental data to check the validity of the model. Numerical results showed that the direct three dimensional (3D) simulation method can deliver accurate results for wave run-up over rubble mound breakwaters. The results showed that the placement pattern of antifer units had a great impact on values of wave run-up so that by changing the placement pattern from regular to double pyramid can reduce the wave run-up by approximately 30%. Analysis was done to investigate the influences of surface roughness, energy dissipation in the pores of the armour layer and reduced wave run-up due to inflow into the armour and stone layer.