B114 Numerical investigation of scalar transfer accross a free surface in the wind-drivien turbulent flow

Abstract

In this study, Direct Numerical Simulation (DNS) of wind-driven turbulent flow with heat transfer was conducted by the direct numerical solution procedure (MARS method) for a coupled gas-liquid flow. The Reynolds number is about 3300 based on the gas layer height and the free stream velocity and the computational grids number is 256×164×256 in streamwise, vertical and spanwise directions, respectively. As the results, interactions between free surface behaviors such as Microscale breaking and turbulent structures, effects of the grid dependency on the near free surface turbulent structures and scalar transfer across the free surface were revealed and discussed.