Abstract
There are many applications of selective withdrawal in engineering and environmental fluid mechanics. This paper presents flow structure in water bodies induced by selective withdrawal from two-dimensional and two-layered systems. The flow structure is investigated experimentally by flow visualization, using dye solution and shadowgraph method, for surface withdrawal and bottom withdrawal case.
In the case of super critical withdrawal, the experimental results shows the viscous effects is negligible and flow structure is quite simple. On the other hand, complicated flow structure and intermittent outflow accompanied with spiral shape vortex are visualized when discharge of withdrawal is almost critical condition. Growing vortex in the ambient water due to viscous effect which appears when the discharge of withdrawal is less than critical condition is also visualized and reported that it cause the formation of the middle layer which defined density distribution.
