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Vortex created by the passage of an aircraft wing, revealed by colored smoke Von Karman vortex street behind a drinking straw. Milk was poured into the water to make the current visible. A Kármán vortex street is demonstrated in this photo, as winds from the west blow onto clouds that have formed over the mountains in the desert. This ...
Visible vortex rings can also be formed by the firing of certain artillery, in mushroom clouds, in microbursts, [1] [2] and rarely in volcanic eruptions. [3] A vortex ring usually tends to move in a direction that is perpendicular to the plane of the ring and such that the inner edge of the ring moves faster forward than the outer edge.
The same phenomenon occurs with any fluid, producing vortex rings which are invisible but otherwise entirely similar to smoke rings. Rare visible vortex rings produced by volcanoes have been incorrectly called "smoke rings", despite being formed by the condensation of erupting steam, rather than by combustion. [1]
The polar vortex is a gigantic, circular area of cold air high up in the atmosphere that typically spins over the North Pole (as its name suggests).
Under the right conditions, the local temperature in vortex cores may drop below the local freezing point, in which case ice particles will form inside the vortex cores. The water-vapor condensation mechanism in wingtip vortices is thus driven by local changes in air pressure and temperature.
A vortex beam can be deformed into its characteristic lobe structure while passing through a tilted lens. This happens as a result of a self-interference between different phase points in a vortex. A vortex beam of order l will be split into n = l + 1 lobes, roughly around the depth of focus of a tilted convex lens. Furthermore, the orientation ...
The hexagon does not shift in longitude like other clouds in the visible atmosphere. [12] Saturn's hexagon was discovered during the Voyager mission in 1981, and was later revisited by Cassini-Huygens in 2006. During the Cassini mission, the hexagon changed from a mostly blue color to more of a golden color.
If you have seen an image circulating on Facebook showing an incoming polar vortex expected at the end of January and are worried about severe winter weather, you don't have to worry too much just ...