supercavitation
Sign in to savethumb|300px|An object (black) encounters a liquid (blue) at high speed. The fluid pressure behind the object is lowered below the vapour pressure of the liquid, forming a bubble of vapour (a cavity) that encompasses the object and reduces drag.
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Vinony's link graph records 35 inbound references to supercavitation, and connects out to APS underwater rifle, Germany and Iran.
It is catalogued under the topic Fluid dynamics.
Vinony links it to 17 Wikipedia language editions.
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thumb|300px|An object (black) encounters a liquid (blue) at high speed. The fluid pressure behind the object is lowered below the vapour pressure of the liquid, forming a bubble of vapour (a cavity) that encompasses the object and reduces drag.
In hydrodynamic engineering, supercavitation is the artificial generation of a cavitation bubble to reduce skin friction drag on a submerged object and enable high-speed travel. Applications include torpedoes and propellers, but in theory, the technique could be extended to an entire underwater vessel.
Excerpted from Wikipedia’s “supercavitation” article, available under the CC BY-SA 4.0 licence.