The nonlinear interaction of a pair of counter-rotating vortices

The interaction of a pair of unequal strength counter-rotating vortices is examined using a variety of visualization methods, including volumetric particle image velocimetry. Developed vortex cavitation in the cores of the vortices is also used to characterize the interaction of the initially parallel vortices. A pair of hydrofoils was used to generate two nearly parallel vortices with varying attack angle combinations conditions over a modest range of Reynolds numbers. The vortex pairs that are