Wave Energy Dissipation Using Perforated and Non Perforated Piles

The indispensable vital structure in any harbor is a breakwater in order to make available calm water region inshore. Pile breakwater can be employed as small coastal-protection structure where tranquility required is low. This study is concerned with CFD study on performance of perforated hollow pile to dissipate wave energy and the novelty of this investigation is the role of perforation layout to dissipate energy of water. Pile models under two different incident waves with constant water depth and wave amplitude have been classified into two groups with two different wavelengths, making a total of 10 models which has been simulated numerically by computational flow solver FLOW 3D. The analytical results of simulations show changes in the velocity profiles after piles while dissipation happened in the vicinity of the pile. The results implied that the perforated models can perform better than the non-perforated ones and energy dissipation was found much more significant in perforated piles because dissipation goes on for about 2.5 m after the pile for the perforated case, while for the non-perforated case this distance reduce to 1.5 m after pile.