vortex ring
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
Words Nearby vortex ring
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
How to use vortex ring in a sentence
He must will the imagined vortex-ring to move forward as if it were actually boring a tunnel through the atmosphere.
Clairvoyance and Occult Powers | Swami PanchadasiA vortex-ring produced in the air behaves in the most surprising manner.
The Machinery of the Universe | Amos Emerson DolbearSuch a vortex-ring is made by the smoker who purses his lips into a round hole and sends out a puff of smoke.
The Unseen World and Other Essays | John FiskeNow this is just what a vortex-ring would do in an incompressible frictionless fluid.
The Unseen World and Other Essays | John FiskeAs though it is foolish to follow a vortex ring into a vacuum, and wise to whack at a dirty golf ball on a suburban railway bank.
Marriage | H. G. Wells
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