Turbulent shear flow over fast-moving waves

摘要

The interaction between wind and ocean surface waves into three parameter regimes is divided into three parameter regimes, namely slow, intermediate and fast waves. An analytical model is developed for linear changes to the turbulent air flow caused by waves of small slope that is applicable to slow and to fast waves. The wave-induced turbulent shear stress is parameterized with a damped mixing-length model. Solutions obtained for air flow over fast waves indicate that fast waves are damped, thus giving their energy up to the wind. The damping rate for fast waves lead to e-folding times for the decay of the waves that are a day or longer.