Research Press Release | October 14, 2015
|Overview||When a steep breaking wave hits a vertical sea wall in shallow water, a rapidly ascending planar jet forms due to the wave impact on the wall and creates what is known as a ‘flip-through’ event. Previous studies focused on the impulsive pressures on the wall and on the velocity of the jet; however, in this study, we considered the formation and break-up of the jet itself. The mechanisms for the sequential surface deformations during the flip-through were identified through a stability analysis and a laboratory experiment, and help to explain the columnar structures often seen in photographs of violent wave impacts on harbour walls.|
Yasunori WATANABE, Associate Professor, Coastal & Offshore Engineering, Division of Field Engineering for the Environment, Graduate School of Engineering, Hokkaido University
Transverse instability of ascending planar jets formed by wave impacts on vertical walls.
Proceedings of the Royal Society A (2015.10.14)