| Title |
Characteristics of Surface and Internal Wave Propagation through Density Stratification |
| Authors |
이우동(Lee, Woo-Dong) ; 허동수(Hur, Dong-Soo) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.5.0819 |
| Keywords |
밀도성층;수면파;내부파;와도;파랑변형;3차원 수치파동수조 Density stratification;Surface wave;Internal wave;Vorticity;Wave attenuation;LES-WASS-3D ver. 2.0 |
| Abstract |
Hydrodynamic characteristics of wave propagation through density stratification have not been identified in details. So this study conducted a numerical simulation using LES-WASS-3D ver. 2.0 for analysis of density current due to water temperature and salinity in order to analyze hydraulic characteristics under wave action in a two-layer density stratified fluid. For the validity and effectiveness of numerical wave tank used, it was compared and analyzed with the experiment to show waveform based on $3^{rd}$-order Stoke wave theory at the internal of a density stratification. Using the results obtained from numerical simulation, the surface and internal wave heights are reduced as the wave propagates in a two-layer density stratified water. And the surface or internal wave attenuation became more serious as the vorticities were increased by the velocity difference of wave propagation due to the upper-lower density difference around the interface of a density stratification. As well, the surface and internal wave attenuations became more serious with higher density difference and depth ratio between upper and lower layers when the wave propagates through a density stratification. |