Abstract

Previous studies have shown that microscale wave breaking plays a significant role in the process of heat, gas, and energy exchange between water and air. In this research, the numerical analysis of near-surface flow beneath small-scale wind driven water waves were studied using the model which was validated by the experiment. A gas model was developed in present study to estimate the effect of wind on the water waves. An experiment was conducted at a wind speed of 4.4 m·s -1 to validate the numerical model used in the simulations. The results showed excellent agreement between numerical and experimental studies at the interface and greater water depths. The model also captured the logarithmic behavior of the mean streamwise velocity, which is consistent with previous studies. The two-dimensional simulating results for both clean water surface and contaminated water surface are presented in terms of mean streamwise velocity, wave characteristic including RMS wave amplitude and dominate wavelength, and the structure of vorticity new water surface. Also, some preliminary results of three-dimensional numerical simulations are presented for both clean and contaminated water surface.