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Journal of Korean Society of Coastal and Ocean Engineers > Volume 31(6); 2019 > Article
J Korean Soc Coast Ocean Eng 2019;31(6): 356-367. doi: https://doi.org/10.9765/KSCOE.2019.31.6.356
2차원저천단구조물(LCS)의 주변에서 불규칙파동장의 변동특성
이광호1, 최군호2, 이준형2, 정욱진2, 김도삼3
1가톨릭관동대학교 토목공학과
2한국해양대학교 대학원 토목환경공학과
3한국해양대학교 건설공학과
Variation Characteristics of Irregular Wave Fields around 2-Dimensional Low-Crested-Breakwater
Kwang-Ho Lee1, Goon Ho Choi2, Jun Hyeong Lee2, Uk Jin Jung2, Do-Sam Kim3
1Dept. of Civil Eng., Catholic Kwandong University
2Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University
3Dept. of Civil Eng., Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-ku, Busan 49112, Korea
Corresponding author: Do-Sam Kim ,Tel: +82-51-410-4463, Email: kimds@kmou.ac.kr
Received: November 18, 2019;  Accepted: November 27, 2019.
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ABSTRACT
This study evaluates the variation characteristics of irregular wave fields for two-dimensional Low-Crested Structure (LCS) by olaFlow model based on the two-phases flow by numerical analysis. The numerical results of olaFlow model are verified by comparing irregular wave profile of target wave spectrum and measured one, and their spectra. In addition, spacial variation of irregular wave spectrum, wave transmission ratio, rootmean square wave height, time-averaged velocity and time-averaged turbulent kinetic energy by two-dimensional LCS are discussed numerically. The time-averaged velocity, one of the most important numerical results is formed counterclockwise circulating cell and clockwise nearshore current on the front of LCS, and strong uni-directional flow directing onshore side around still water level.
Keywords: low-crested structure, olaFlow model, irregular wave spectrum, wave transmission ratio, Hrms, time-averaged velocity (nearshore current), time-averaged turbulent kinetic energy
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