Abstract
In this study, we focus on substance transportation of counter-rotating vortex-pair in the uniform flow, and its interaction with a flat plate is visualized. A water tunnel and aluminum wings (NACA0012) are used to generate a wing-tip vortex pair. Visualization dyes used are fluorescein sodium salt and rhodamine B. The vortex-plate interactions with periodic entrainment are observed when the distance between a plate and vortex-pair are relatively close each other. Experiment and an inviscid vortex dynamics calculation with an Oseen vortex are different when vortex and plate are close, where the effect of a secondary vortex induced by viscosity is important.
