出典:Wiktionary
出典:『Wiktionary』 (2013/08/20 02:34 UTC 版)
出典:『Wiktionary』 (2026/04/07 19:36 UTC 版)
fire whirl (plural fire whirls)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/01 23:35 UTC 版)
A fire whirl, colloquially fire devil or fire tornado, is a rarely captured phenomenon in which a fire, under certain conditions (depending on air temperature and currents), acquires a vertical vorticity and forms a whirl, or a tornado-like vertically oriented rotating column of air. Fire whirls may be whirlwinds separated from the flames, either within the burn area or outside it, or a vortex of flame, itself.