Experimental study on the fluid flow and material transport around a harbor driven by the tidal effect

J. Ocean Eng. Technol. 1996;10(1):100-107.

조석효과에 의한 항구 모델 주위의 유동 및 물질전달에 관한 실험적 연구

서용권,문종춘,강종대

동아대학교 기계공학과,동아대학교 생산기술 연구소,한국중공업

Key Words: Tidal Effect, Mass Transport, Visualization Experiment, Residual Flow, Vortex Shedding, Jet Flow

핵심용어: 조석효과, 물질전달, 가시화실험, 잔류유동, 와류쉐딩, 제트유동

Abstract

In this paper, we report the results of the experimental study on the flow and the mass transport around a square harbor driven by a tidal effect. The model harbor is composed of a uniform water-depth with a straight breakwater. The harbor is connected to the outer ocean by an entrance region having the same shape as the harbor. We investigated two cases, one having another breakwater in the place between the entrance region and the outer ocean, and the other without it, The surface and bottom flow patterns of the model container are visualized by using light particles and dye, respectively. It was shown that the inner harbor and the entrance region have well-organized, large vortical residual flows, and the material transport between the entrance and outer region is however significantly different for two cases; when the breakwater is built between the two regions, the transport is far better than that without it, which is clearly contrary to our common sense that the breakwater would block the dispersion of the materials between the harbor and the outer ocean.