PIV法による砕波を伴う風波の界面乱流構造に関する研究

抄録

To solve the global warming problem, one of the environmental ones presented all over the world, we need to evaluate accurately the quantitative and qualitative characteristics in the global circulation process of th e issued gas, such as CO₂. However, there is little basic information about kinetic relationships between water and air at the water sphere in the earth. As we reveal the gas transport phenomenon across the air-water interface, we find it very important to investigate the mutual turbulent structures in each phase of the wavy interface. Therefore in this study, we examined the element motion in the interface instantaneously, by making use of Particle-Image Velocimetry (PIV) which enables us to measure the simultaneous velocity components at all points in laser-light sheet, and analyzed turbulent structures with phase -averaged method. This study resulted in the fact that the effect of both water disturbance and air entrainment is superior to the one of turbulen ce in terms of gas transfer mechanism on the flow with breaking wave.