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Submerged objects are widely occurred in ocean and coastal engineering. Their presence influences the neighbouring flow field and even generates higher harmonic waves. A two-dimensional fully nonlinear numerical wave flume, based on a time-domain higher-order boundary element method is developed to investigate nonlinear interactions between regular waves and a submerged object. The incident wave is generated by the inner-source wavemaker. Fully nonlinear kinematics and dynamics boundary conditions are satisfied on the transient free surface. A mixed Eulerian-Lagrangian technique combined with the fourth-order Runge-Kutta scheme is used as the time marching process. A four-point method is used to separate bound and free harmonic waves. The proposed model is verified against the experimental and other numerical data for nonlinear waves scattering by a submerged trapezoid and a submerged horizontal cylinder, respectively. Numerical tests are performed to investigate the effects of submergence and characterised length of a submerged object, static water depth on the high free harmonics.
|Number of pages||12|
|Publication status||Published - 15 Jun 2015|
|Event||6th Conference on Computational Methods in Marine Engineering (Marine 2015) - Rome, Italy|
Duration: 15 Jun 2015 → 17 Jun 2015
|Conference||6th Conference on Computational Methods in Marine Engineering (Marine 2015)|
|Period||15/06/15 → 17/06/15|
- Submerged object
- nonlinear numerical wave flume
- higher-order boundary element method
- higher harmonics
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- 1 Finished
Flexible-Blades: Flow control to mitigate fatigue load through the use of flexible tidal turbine blades
Viola, I. M., Richon, J., Tully, S., Arredondo, A., Le Mestre, R. & Muir, R.
1/10/14 → 30/06/15