Nonlinear diffraction effects around a surface-piercing structure
- Istituto Nazionale per Studi ed Esperienze di Architettura Navale, Rome (Italy)
In the present paper the interaction of a wave system with a submerged or surface piercing body is studied. The wave diffraction caused by a cylinder in finite depth water and by a shoal is been computed and the results are compared with analytical solutions and experimental data. The problem is analyzed numerically in the frame of irrotational incompressible flow hypothesis. Both the linearized and the fully nonlinear mathematical models are studied. The numerical solution is gained by means of a mixed panel-desingularized formulation. An explicit time-marching algorithm updates the wave elevation and the potential at the free surface. In all cases, the numerical simulation mirrors the experimental data. In the case of the diffraction around a cylinder, the simulation confirms and extends the theoretical results of the second order analysis (Kriebel 1990, 1992): the linear model yields a very good estimation of the force amplitude acting on the body, while the wave profiles are poorly predicted when compared with the fully nonlinear simulation and the experimental data.
- OSTI ID:
- 260397
- Report Number(s):
- CONF-950604--; ISBN 1-880653-19-2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Computation of hydrodynamic loads on a bottom-mounted surface piercing cylinder
Wave diffraction around three-dimensional bodies in a current