孤立波底面境界層に関する研究

抄録

Characteristics of wave boundary layer are key factor controlling sediment movement due to wave motion. Theory of solitary wave is suitable for representation of wave motion which enters into water area under still condition. Although there have been numerous researches on wave boundary layers, most of them have dealt with sinusoidal wave motion for simplicity. It is expected that the characteristics of bottom boundary layer under solitary wave motion is different from those under sinusoidal waves because of rapid accelerating effect. The present study describes characters of bottom boundary layer under solitary wave. Using an oscillatory flow generator, laboratory measurement of velocity profile is conducted. Furthermore, numerical experiment using Baseline k-co model is carried out to make a comparison with experiment regarding velocity profile, turbulent kinetic energy and wall shear stress.