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%ما هو (من)٪ 1 - تعريف
Lamb-oseen vortex; Lamb-Oseen vortex; Oseen vortex; Lamb vortex
Vortex ring
![The curved arrows indicate airflow circulation about the rotor disc. The helicopter shown is the [[RAH-66 Comanche]].](https://commons.wikimedia.org/wiki/Special:FilePath/Vortex ring helicopter.jpg?width=200 "The curved arrows indicate airflow circulation about the rotor disc. The helicopter shown is the [[RAH-66 Comanche]].")
TORUS-SHAPED VORTEX IN A FLUID OR GAS
Spherical vortex; Hill's vortex; Vortex ringstate; Toroidal vortex; Hill's Spherical Vortex
A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid; that is, a region where the fluid mostly spins around an imaginary axis line that forms a closed loop. The dominant flow in a vortex ring is said to be toroidal, more precisely poloidal.
Vortex ring
TORUS-SHAPED VORTEX IN A FLUID OR GAS
Spherical vortex; Hill's vortex; Vortex ringstate; Toroidal vortex; Hill's Spherical Vortex
·add. ·- A ring-shaped mass of moving fluid which, by virtue of its motion of rotation around an axis disposed in circular form, attains a more or less distinct separation from the surrounding medium and has many of the properties of a solid.
Kármán vortex street
![Visualisation]] of the vortex street behind a circular cylinder in air; the flow is made visible through release of glycerol vapour in the air near the cylinder](https://commons.wikimedia.org/wiki/Special:FilePath/Karmansche Wirbelstr kleine Re.JPG?width=200 "Visualisation]] of the vortex street behind a circular cylinder in air; the flow is made visible through release of glycerol vapour in the air near the cylinder")
![strakes]] fitted to break up vortices](https://commons.wikimedia.org/wiki/Special:FilePath/Proserpine Mill - January 2012.jpg?width=200 "strakes]] fitted to break up vortices")
![A look at the Kármán vortex street effect from ground level, as air flows quickly from the [[Pacific ocean]] eastward over [[Mojave desert]] mountains. This phenomenon observed from ground level is extremely rare, as most cloud-related Kármán vortex street activity is viewed from space.](https://commons.wikimedia.org/wiki/Special:FilePath/Whirpool Clouds.jpg?width=200 "A look at the Kármán vortex street effect from ground level, as air flows quickly from the [[Pacific ocean]] eastward over [[Mojave desert]] mountains. This phenomenon observed from ground level is extremely rare, as most cloud-related Kármán vortex street activity is viewed from space.")
REPEATING PATTERN OF SWIRLING VORTICES CAUSED BY THE UNSTEADY SEPARATION OF FLOW OF A FLUID AROUND BLUNT BODIES
Vortex street; Vortex trail; Vortex train; Von Karman vortex street; Vortex Street; Kármán vortex trail; Kármán Vortex Trail; Kármán Trail; Von Karman street; Karmen vortice; Karmen vortices; Karman vortex; Karman vortices; Kármán vortex; Kármán vortices; Von Kármán vortices; Von Kármán vortex; Von Karman vortices; Von Karman vortex; Karman Vortex Trail; Karman vortex street; Karman vortex trail; Karman Trail; Von Kármán vortex street; Karman wind
In fluid dynamics, a Kármán vortex street (or a von Kármán vortex street) is a repeating pattern of swirling vortices, caused by a process known as vortex shedding, which is responsible for the unsteady separation of flow of a fluid around blunt bodies.
ويكيبيديا
Lamb–Oseen vortex
In fluid dynamics, the Lamb–Oseen vortex models a line vortex that decays due to viscosity. This vortex is named after Horace Lamb and Carl Wilhelm Oseen.
