| Title |
Nonlinear Interaction among Wave, Current and Submerged Breakwater |
| Authors |
박수호(Park, Su-Ho) ; 이정후(Lee, Jung-Hoo) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.6.1037 |
| Keywords |
파-흐름 비선형 상호간섭;파-흐름 수치수로;파-흐름-구조물 상호간섭;유속 및 와도장 Nonlinear interaction between wave and current;Numerical wave-current tank;Interaction of wave-current-structure;Velocity and vorticity |
| Abstract |
In this study, nonlinear wave interaction in the presence of a uniform current is studied using numerical model, named CADMAS-SURF which is based on the Navier-Stokes equations coupled with Volume of Fluid for tracking free surface deformation. The original CADMAS-SURF developed for interaction of wave with structure is modified/extended to simulate nonlinear fluid dynamic motions within wave-current coexisting field. The capability of Numerical Wave-Current Tank (NWCT) in this study is validated by comparing with available existing laboratory experiments for both wave-following and wave-opposing current. The numerical results for interaction between wave and current are shown to be in good agreement with experimental data. Then, this study focused on the dynamic motions of the water velocity, surface elevation and vorticity within combined wave-current field in demonstrating complex nonlinear physical phenomena due to interaction between wave and current. In addition, NWCT is applied to simulate a more complex wave-current-structure field for wave propagating over a submerged breakwater associated with current. Detailed discussion including characteristics of velocity and vorticity fields and the relation between free surface and vorticity are given. |