천해역에서 모래지반을 전파하는 고립파의 감쇠특성

• Published in: 한국연안방재학회지 Vol. 7; no. 4; pp. 203 - 211
• Main Author: 이우동(Woo-Dong Lee), 박종률(Jong-Ryul Park), 정영한(Yeong-Han Jeong), 이상엽(Sang-Yeop Lee), 허동수(Dong-Soo Hur)
• Format: Journal Article
• Language: Korean
• Published: 한국연안방재학회 30.10.2020; Korean Society of Coastal Disaster Prevention; (사)한국연안방재학회
• Subjects: 지구과학; Solitary wave; Numerical wave tank; Sandy bed; Wave damping; Fluid-soil interaction
• ISSN: 2288-7903; 2288-8020
• DOI: 10.20481/kscdp.2020.7.4.203

To analyze the damping characteristics of solitary waves over a sandy bed, a numerical wave tank (NWT) with non-reflected wave generation system for solitary waves was used in this study. For the validity and effectiveness of NWT used, it was compared with the theoretical results to show damping phenomena of solitary wave passing over a porous bed. It is shown that the applied NWT in this study is applicable to the numerical analyses of a solitary wave propagation over a porous bed. Using the results obtained from NWT, the solitary wave amplitudes were reduced as the wave propagates over a sandy bed. And the solitary wave attenuations became more serious as the vorticity and turbulence kinetic energy were increased by the velocity difference around the face of a sandy bed. As well, the solitary wave attenuations became more serious with higher amplitude ratio to water depth when the solitary wave propagates over a sandy bed. In addition, the effects of effective wavelength on the damping of solitary waves over a sandy bed is discussed. KCI Citation Count: 0