Breakwater

Traditional breakwaters are large in size and are often associated with large building materials, workloads, and costs. The development of a large-scale breakwater with insufficient design and management may have a series of adverse effects on adjacent coastal environments such as large wave reflection, beach morphology change, water quality deterioration, marine ecosystem change . In order to alleviate the above problems, it has been proposed to test and construct various creative designs of light breakwaters as a replacement for conventional breakwaters, one of which is the free surface breakwater.

One of management management methods is construction of breakwaters and docks. Docks and breakwaters are artificial structures designed to protect coastal areas from the natural and unnatural decline of the coastline. Breakwaters are usually constructed at an angle parallel to the coastline, or at the angle that will cause damage if severe waves are generated on the coastline. On the other hand, the purpose of the dock is to prevent erosion at the entrance and port area. Since the marine breakwater is based on wave refraction and diffraction, she will provide a shelter (Putnam and Arthur, 1948). Likewise, the groin is constructed to create an angle facing the sea and inclined at the same angle as the normal beach. The groin is built at a height above the reference point as a stabilizing structure that broadens the width of the beach partially or collectively by preventing coast drifting (Paige 1950)

Abstract: Breakwaters built in coastal areas are hard protection measures to protect coastline, harbor, port or estuary from hydrodynamic forces under severe wave conditions. However, the presence of breakwaters destroys the natural state of the flow by dissipating, reflecting and refracting the incident wave, resulting in a more gentle wave on the side of the structure. Therefore, clogging of breakwaters creates peeling flow and recirculation flow is formed within breakwaters. In this study, using the Lattice Boltzmann method, we simulate the circulating flow around the breakwater at the Chendering fishing port in Terengganu, Malaysia, using the turbulence model shallow water equation (LABSWETM). The results of the recycle stream were analyzed in terms of flow pattern and flow rate. For 180 × 130 and 90 × 64 different grid sizes, significant wave heights of three values ​​of 45 m, 24 m and 0.4 m were tested.