Investigation of surface waves interacting with a fixed cylinder and generated by a heaving cylinder using Smoothed Particle Hydrodynamics (SPH)

摘要

Generating energy from waves with floating/heaving bodies can place those devices under extreme loading conditions. In this paper, we present an investigation into the wave loading on fixed and heaving cylindrical bodies using the meshless numerical method Smoothed Particle Hydrodynamics (SPH) based on the open-source code SPHysics with a Riemann solver. Results are presented for the wave loading on a fixed partially submerged cylinder and compared with the data of Dixon et al. (1979) where for the half-submerged cylinder the agreement with the experimental data for root mean square force is within 2%. For the submerged cylinder, the results also show promising agreement but with some discrepancy. Surface waves generated by a 2-D heaving cylinder are compared with the experimental data of Yu and Ursell (1961) where a more accurate answer for wave profile is obtained using a finer resolution. To compute the free-surface motion efficiently, variable mass distribution is employed around the cylinder where surface waves are generated paying careful attention to avoid tensile instability with the interpolating kernel function. This work is a part of a study examining extreme wave loading on floating bodies using SPH.