| Title |
Application of 3-D Numerical Wave Tank for Dynamic Analysis of Nonlinear Interaction between Tsunami and Vegetation |
| Authors |
이우동(Lee, Woo-Dong) ; 허동수(Hur, Dong-Soo) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.5.0831 |
| Keywords |
쓰나미-식생 상호작용;유체저항;식생항력;항력계수;고립파;3차원 수치파동수조 Tsunami-vegetation interaction;Fluid resistance;Vegetative drag;Solitary wave;3-D numerical wave tank |
| Abstract |
The disaster preventing system using vegetation has been growing in the field of coastal engineering in recent years. To analyze wave and flow fields under nonlinear interactions between tsunami and vegetation, the purpose of this study is to evaluate newly-developed 3-D numerical wave tank including energy dissipation by tsunami-vegetation interaction based on existing N-S solver with porous body model. Comparing numerical results using mean drag coefficient and dynamic drag coefficient due to Reynolds number to existing experimental results it is revealed that computed results considering the dynamic drag coefficient are in good agreement with the laboratory test results for time-domain waveform. In addition, the calculated transmission coefficients of solitary waves in various vegetation densities and incident wave heights are also in good agreement with the experimental values. This confirms the validity and effectiveness of the developed 3-D numerical wave tank with the fluid resistance by vegetation. |