Vortex generation and evolution in water waves propagating over a submerged rectangular obstacle Part I. Solitary waves

摘要

Interactions between a solitary wave an a submerged recangular obstacle are investigated both experimentally and numerically. The Particle Image Velocimetry (PIV) technique is used to measure the velocity field in the vicinity of the obstacle. The generation and evolution of vortices due to flow sepration at the corners of the obstacle are recorded and analyzed. It is found that although the size of the vortex at the weatherside of the obstacle is smaller than that at the leeside, the turbulence intensity is, however, stronger.