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The Scientific World Journal
Volume 2014, Article ID 954174, 14 pages
http://dx.doi.org/10.1155/2014/954174
Research Article

Experimental Studies on Wave Interactions of Partially Perforated Wall under Obliquely Incident Waves

1Department of Marine and Civil Engineering, College of Engineering Sciences, Chonnam National University, 50 Daehak-ro, Yeosu, Jeonnam 500-749, Republic of Korea
2River and Coastal Research Division, Korea Institute of Construction Technology, Goyang-si, Gyeonggi-do 411-712, Republic of Korea
3Experimental Center for Coastal & Harbor Engineering, Chonnam National University, 50 Daehak-ro, Yeosu, Jeonnam 500-749, Republic of Korea

Received 18 June 2014; Accepted 6 August 2014; Published 1 September 2014

Academic Editor: Guoliang Huang

Copyright © 2014 Jong-In Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study presents wave height distribution in terms of stem wave evolution phenomena on partially perforated wall structures through three-dimensional laboratory experiments. The plain and partially perforated walls were tested to understand their effects on the stem wave evolution under the monochromatic and random wave cases with the various wave conditions, incident angle (from 10 to 40 degrees), and configurations of front and side walls. The partially perforated wall reduced the relative wave heights more effectively compared to the plain wall structure. Partially perforated walls with side walls showed a better performance in terms of wave height reduction compared to the structure without the side wall. Moreover, the relative wave heights along the wall were relatively small when the relative chamber width is large, within the range of the chamber width in this study. The wave spectra showed a frequency dependency of the wave energy dissipation. In most cases, the existence of side wall is a more important factor than the porosity of the front wall in terms of the wave height reduction even if the partially perforated wall was still effective compared to the plain wall.