Bragg reflection of sinusoidal waves due to trapezoidal submerged breakwaters

• Published in: Ocean engineering Vol. 33; no. 14; pp. 2067 - 2082
• Main Authors: Jeon, Chan-Hoo, Cho, Yong-Sik
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 01.10.2006; Elsevier
• Subjects: Applied sciences; Bragg reflection; Buildings. Public works; Exact sciences and technology; Hydraulic constructions; Marine; Navier–Stokes equations; Port facilities and coastal structures. Lighthouses and beacons; Sinusoidal wave; Trapezoidal submerged breakwater; Navier–Stokes equations; Bragg reflection; Sinusoidal wave; Trapezoidal submerged breakwater; Immersed body; Experimental study; Wave reflection; Breakwater; Navier Stokes equation; Laboratory test; Numerical simulation; Coastal structure; Trapezoidal shape; Navier-Stokes equations
• ISSN: 0029-8018; 1873-5258
• DOI: 10.1016/j.oceaneng.2005.07.013

Numerical and laboratory experiments are performed to investigate characteristics of the Bragg reflection due to multi-arrayed trapezoidal submerged breakwaters. The numerical model is based on the Reynolds averaged Navier–Stokes equations with the VOF method and the k–ε turbulence closure model. As expected, the reflection coefficients increase as the array of submerged breakwaters increases in both laboratory measurements and numerical results. The resonant periods provide similar relative wave numbers regardless of the permeability and the number of arrays. The reflection coefficients due to porous breakwaters are smaller than those due to non-porous breakwaters. The velocity contours for two and three arrays are also described.