A smoke ring is a visible vortex ring formed by smoke in a clear atmosphere.
Smokers can blow smoke rings from the mouth, intentionally or unintentionally. The smoke ring can also be formed by sudden bursts of fire (such as lighting and immediately extinguish cigarette lighters), by shaking smoke sources (like incense) up and down, by firing several types of artillery, or by the use of special devices, such as toys vortex rings. The head of a mushroom cloud is a huge smoke ring.
The smoke ring is usually formed when a cloud of smoke is suddenly injected into the clear air, especially through a narrow opening. The outside of the puff is slowed by the still air (or by the opening edge) relative to the center, giving it a distinctive poloid flow pattern.
Smoke makes the ring visible, but does not significantly affect the flow. The same phenomenon occurs with any liquid, creating an invisible vortex ring but vice versa very similar to the smoke circle.
Video Smoke ring
Smoking and breathing
A smoker can make a ring by taking smoke into his mouth and dispose of it with a tongue motion, by closing the jaw, knocking on the cheek, or producing a sudden airburst with his lungs and throat. Smokers can also use one of these methods to blow smoke clouds outside their mouths.
The trick that is often done along with the smoky ring of mouths is inhaling France.
It is also possible to make steam rings using the same technique on a cold day with just one's breath.
The most famous steam ring is produced in the mid-20th century by Douglas Leigh's billboard at Claridge Hotel in New York City Times Square, Camel cigarette advertisement. An automatic steam room behind a billboards produces steam vapors every four seconds, giving the impression of a smoke ring leaving the smoker's open mouth and floating away. Inspired by the World War II ban on flaming ads, camel smokers remained a landmark of Times Square shortly afterward.
Some users of electronic cigarettes modify their devices to inhale vast amounts of steam at once, to blow "cloud" in patterns like smoke rings.
Maps Smoke ring
Volcano
Under certain conditions, some volcanic vents may produce visible large visible smoke rings. Despite the rare phenomenon, several volcanoes have been observed emitting massive vortex rings of steam and gas:
- Mount Etna, Italy (Sicily)
- Stromboli, Italy (Aeolia Islands)
- EyjafjallajÃÆ'¶kull, Iceland
- Hekla, Iceland
- Tungurahua, Ecuador
- Pacaya, Guatemala
- Mount Redoubt, United States (Alaska)
- Mount Aso, Japan (Kyushu)
- Whakaari (White Island), New Zealand
- Mount Slamet, Indonesia (Central Java)
- Momotombo, Nicaragua (LeÃÆ'³n)
See also
- Bubble ring
- Vortex ring toys
References
External links
- How to caress a smoke ring?
- Blowing smoke circle (wikiHow)
- The smoke ring generated by the Etna volcano eruption
- The smoke ring of the Stromboli volcano
- Instructions on building a smoke ring gun
- Smoke rang at the disposal of the US Army in Iraq (see image below)
- Thomson, Sir William (Lord Kelvin), At Vortex Atoms , Proceedings of the Royal Society of Edinburgh, Vol. VI, 1867, pp.Ã, 94-105.
- Silliman, Robert H., William Thomson: The Nineteenth-Century Ring of Smoke and Atomism , Isis, Vol. 54, No. 4. (Dec., 1963), pp.Ã, 461-474. JSTOR Link
- Modern recreational films from Tait's smoke ring experiment
- How to Smack a Smoke Ring - Howiw
- How to Smack the Smoke Ring
Source of the article : Wikipedia
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