Numerical Study on the Interaction between the Internal and Surface Waves by a Sphere Moving in a Two-Layer Stratified Fluid

초록

The water temperature of the ocean varies according to the depth and generates a thermocline layer. The internal wave is excited by an object moving near the thermocline layer because the density of the water changes due to the water temperature, and the internal wave propagates and interacts with the surface wave. In this study, a two-layer stratified fluid consisted of air(ρair)-water1(ρw1)-water2(ρw2) is applied to simplify the numerical simulations. The interaction between the internal and surface waves is studied with a sphere. In this paper, the generation and propagation of the internal wave according to the speed of the sphere are studied.