Reynolds응력모형에 의한 온배수 밀도류 해석기법의 개발 = Development of a Numerical Method with Reynolds Stresses of Density Current Driven by Surface-Discharged Heated Cooling Water

다국어 초록 (Multilingual Abstract)

More intensive investigation for problems due to the treatments of free surface, Reynolds stress/flux terms in turbulent flow, especially buoyancy effects on the turbulent fluctuations, etc. is required in a numerical study on the surface-discharged buoyant jets. The verification of predicted results from the numerical study continues to be in the state of quality study, because of the lack of experimental data due to the difficulties in measuring the turbulent fluctuations in concentration or temperature fields.
In this study, the two comparative computer programs of k-e model being widely used for the simplicity of computation and Algebraic Stress Model considering anisotropy of turbulent flow have been developed to compute the characteristics of two-dimensional surface buoyant jets with the free surface boundary condition. By comparing these results with experimental data, it is found that k-e model can predict fairly well the characteristics of two-dimensional surface buoyant jets in the momentum-dominant region. But in buoyancy-dominant stratified region, this model revealed a limitation to the applicability of them. On the other hand, computational results of Algebraic Stress Model are proved to predict the flow characteristics reasonably in the whole region.