성층화된 유체 내에서 내부파와 표면파의 파형 변화에 관한 수치적 연구

초록

Internal waves occur at the interface between the two layers caused by the difference in the density of seawater. The internal waves generated by a body moving in the two-layer fluid are also related to the generation of surface waves due to their interaction. In these complex flow phenomena, the experimental measurement as well as the experimental set-up for the wave patterns of the internal waves and surface waves are very difficult to be performed in a laboratory. Therefore, the researches have mainly been carried out by numerical analysis. However, model tests are needed to evaluate the accuracy of numerical models. In this study, the various experimental conditions are evaluated using the CFD simulations before the experiments to measure the wave patterns of the internal waves and the surface waves in the stratified two-layer fluid. The numerical simulation conditions includes the variations of the density of fluids, the depth of two-layer fluid, and the moving speed of underwater body.