SwirliesWater Drop called "Swirlies"
A simple water droplet is beautiful, but when two drops collide, the varieties are endless and fascinating. The shapes are affected by many things: the physical properties of the liquid, such as surface tension and viscosity, as well as the timing of the drops and when the camera's shutter is opened and flash fired. Being experiments in fluid dynamics, they reveal the chaotic nature of fluid flow - it can be quite reproducible sometimes, and other times highly sensitive to initial conditions.
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