In fluid dynamics, a vortex is a region in a fluid in which the flow revolves around an axis line, which may be straight or curved. Vortices form in stirred fluids, and may be observed in smoke rings, whirlpools in the wake of a boat, and the winds surrounding a tropical cyclone, tornado or dust devil. Vortices are a major component of turbulent flow. The distribution of velocity, vorticity, as well as the concept of circulation are used to characterise vortices. In most vortices, the fluid flow velocity is greatest next to its axis and decreases in inverse proportion to the distance from the axis. In the absence of external forces, viscous friction within the fluid tends to organise the flow into a collection of irrotational vortices, possibly superimposed to larger-scale flows, including larger-scale vortices. Once formed, vortices can move, stretch, twist, and interact in complex ways. A moving vortex carries some angular and linear momentum, energy, and mass, with it.

Read more in the app

Theoretical physicists argue that black holes admit vortex structures

Vortex binoculars deals and discounts

Become a Jovian Vortex Hunter: Help NASA by Spotting Vortices on the Planet Jupiter

Understanding of vortex spread in superfluids expanded

Researchers expand understanding of vortex spread in superfluids

Vortex 10x50 Crossfire HD binocular review

Spiraling vortex of 60 sharks rips apart a dead humpback whale in mesmerizing new video

Mysterious Vortex Waves Discovered on The Sun Hint at New Solar Physics

Vortex microscope sees more than ever before

Into the vortex

A Vortex in a Nanometric Teacup: Researchers Generate a Vortex Beam of Atoms and Molecules

Vortex binoculars deals and discounts

1st 'atom tornado' created from swirling vortex of helium atoms

Physicists Create Swirling Tornado of Helium With First-Ever Atomic Vortex Beam

1st 'atom tornado' created from swirling vortex of helium atoms

New ‘vortex beams’ of atoms and molecules are the first of their kind

Vortex, the key to information processing capability: Virtual physical reservoir computing