대류경계층에서 난류흐름에 관한 수치해석적 연구 = A Numerical Study on Turbulent Flows in CBL

다국어 초록 (Multilingual Abstract)

As turbulent flow include a complex physical process in the convective boundary layer(CBL), it is difficult to explain the physical phenomena exactly. Therefore, it is possible to explain the model in a simple and limited way. For the explanation of the CBL turbulence, enormous amounts of data are required concerning in CBL turbulence. A method to study the structure and characteristics of CBL is numerical simulation of important parts of the flow field i.e. through large eddy simulation(LES).
In this study, turbulence in the CBL uniformly heated from below and topped by a layer of uniformly stratified fluid is investigated for flows by numerical simulation(LES). LES uses a finite-difference method to integrate the three-dimensional grid-volume-averaged Navier-Stokes equation for a Boussinesq fluid. In LES, the contribution of the large-carrying structures to momentum, heat and energy transfer are computed exactly, and only the effect of the smallest scales of turbulence is modeled. The purpose of this study is to analyze the velocity and temperature distributions in CBL turbulence in order to study the dispersion of atmospheric pollutant by LES.