Diffraction of Multi-directional Random Waves Asymmetric in Direction
- Authors
- Jung, Jae-Sang; Ha, Taemin; Cho, Yong Sik
- Issue Date
- May-2011
- Publisher
- COASTAL EDUCATION & RESEARCH FOUNDATION
- Keywords
- asymmetry; diffraction; multi directional random waves
- Citation
- JOURNAL OF COASTAL RESEARCH, pp.534 - 541
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF COASTAL RESEARCH
- Start Page
- 534
- End Page
- 541
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168505
- ISSN
- 0749-0208
- Abstract
- In deep water, when multi-directional random waves symmetric to the direction of propagation are incident obliquely on the shore, directional asymmetry is generated as a result of refraction. In this research, considering directional properties of asymmetry caused by refraction, we calculated refraction pattern of multi-directional random waves near a semi-infinite breakwater and a breakwater gap, and compared it to the results of unidirectional random waves and of monochromatic wave. When angle of incidence of the wave on a semi-infinite breakwater is less than 90 degrees, wave height was calculated to be greater when a asymmetry was considered compared to the case of perfect symmetry; and the opposite was evident when the angle of incidence was greater than 90 degrees. In case of a breakwater gap, near the perpendicular direction to the entrance, wave height distribution was found to be more concentrated when asymmetry was considered compared to when it was not.
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