vortex ring

noun

a stable perturbation in a fluid that takes the form of a torus in which the flow rotates in the section of the torus so that the pressure difference between the inside and outside of the torus balances body forces. The best-known vortex ring is a smoke ring

Nearby words

vorspiel, vorster, vorster, balthazar johannes, vortex, vortex drag, vortex ring, vortex shedding, vortex street, vortex vein, vortical, vortically

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for vortex ring

Now this is just what a vortex-ring would do in an incompressible frictionless fluid.
The Unseen World and Other Essays|John Fiske
A vortex-ring produced in the air behaves in the most surprising manner.
The Machinery of the Universe|Amos Emerson Dolbear
One may, without mechanical difficulties, imagine a vortex-ring destroyed.
The Machinery of the Universe|Amos Emerson Dolbear
Through a vortex-ring or tube, the fluid circulates in closed lines of flow, each one of which is laced through the tube.
Lord Kelvin|Andrew Gray

This vortex-ring theory shows easily how possible it is to-day to think what once was philosophically incredible.
The Machinery of the Universe|Amos Emerson Dolbear

vortex ring

noun

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Nearby words

Examples from the Web for vortex ring