The unique fishbone pattern is created by two colliding steams of liquids. Each stream or jet is created by a 1mm diameter nozzle. This image if from a series of images where the velocity of the fluid jet is varied from .8 to 3 meters per second. This pattern is currently the focus of scientists studying the strange world of fluid dynamics. The pattern is a stable flow state that is a balance of surface tension, viscosity, momentum, and gravity. The fluid used in this experiment is 50% water - ethylene glycol solution with a viscosity of 20cS. This image was taken with a high speed flash at 1/40,000th of a second at a magnification of 1x. This pattern can also be called the fish effect, herringbone effect, or the fishbone effect.
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