Demos: 2C-01 Low Reynold's Number

Reynold’s Number is an experimental value used in fluid flow to predict at what velocity the flow of the fluid becomes turbulent. In this demonstration, we use glycerol contained in a cylindrical ring. A special ink is injected and the ring is spun using the crank. Turn the ring (preferably slowly so it will be easier to duplicate the motion) and keep track of the number of turns. When finished, repeat making the same number of turns at the same speed but in the opposite direction. When finished the ink will return to the original shape and size. Because of the size of the ink drop, the viscosity and density of the glycerol and the motion in which you turned you have kept a Low Reynold’s Number. Because of the low value, no turbulence was caused and the ink returns to its original shape.

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