3-DIMENSIONAL DIFFUSION CHARACTERISTICS OF FORCED PLUME SURFACE-DISCHARGED IN COASTAL SEA

Abstract

The diffusion behavior of a forced plume surface-discharged in coastal sea was investigated by field observation and numerical simulation. The distribution and fluctuation of velocity and temperature were measured in the field, and then the characteristics of the 3-dimensional structure and vertical eddy viscosity/diffusivity were evaluated. In this case, a 3-dimensuional turbulent closure model (k-ε model) was applied to simulate the behavior of surface forced plume. The performance of the 3-dimensuional model was also discussed by the comparison of numerical results with the in-situ data.