The Ranque-Hilsch vortex tube is an innovative device that utilises compressed gas to separate energy streams into distinct hot and cold outputs. Its operation is based on complex internal flow ...
ONE of the most interesting phenomena observed in fluid flow is that of vortex shedding, the best known example of which is the von Kármán vortex street behind a cylinder or similar obstacles normal ...
(via Steve Mould) A vortex tube splits a stream of air into hot and cold! This is how it works and why it doesn't violate the second law of thermodynamics.
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