Development of 3-D Fully Nonlinear Numerical Wave Tank : 2nd Report: Waves around the Sphere and Spheroid with and without Forward Velocity

Abstract

Regular wave diffraction problems by a sphere and spheroid with no forward velosity are simulated. The amplitudes of hydrodynamic forces are compaured to linear results. Waves arround a sphere and spheroid with forwald velosity are simulated. The hydrodynamic forces acting on it are calculated. A method to simulate linear waves is discribed for the reduction of the computational cost. Wave penetrate boundary condition is employed to simulete sinusoidal periodic waves around a body.Wave fields around a restrained sphere and a restrained slender spheroid are simulated. Simultaneously hydro dynamic forces on them are estimated. Wave field around a free heaving sphere are simulated.