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Peculiar Fluid Dynamics Creates Hot and Cold Air

We’re fascinated by things with no moving parts or active components that work simply by virtue of the shape they contain — think waveguides and resonators for microwave radiation. A similarly mystical device from the pneumatics world is the Hilsch Vortex Tube, and [This Old Tony] decided to explore its mysteries by whipping up a DIY version in his shop. Invented in the 1930s, vortex tubes are really just hollow tubes with an offset swirl chamber.
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