Abstract
Traces of certain long-chain molecules added to fluids can greatly reduce turbulent friction on bodies moving through the fluid, or on surfaces past which it flows. Reductions of the friction by as much as 40 per cent can be achieved by as little as 10 parts per million by weight. The technique is already being used to reduce friction in the extraction of petroleum from oil wells. It may also make it possible to attain greater efficiency in pumping oil through pipes over long distances, in central-heating systems, and even in canals.
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