| 单词 | leidenfrost point |
| 释义 | > as lemmasLeidenfrost point Used attributively and in the possessive with reference to a phenomenon observed by Leidenfrost, in which liquid, when placed in contact with a surface whose temperature exceeds some critical value (the Leidenfrost point), forms a layer of vapour which insulates it from the surface. ΘΚΠ the world > matter > chemistry > physical chemistry > phases > [noun] > critical points > critical value > exceeded by a surface temperature Leidenfrost point1977 1863 E. Atkinson tr. A. Ganot Elem. Treat. Physics vi. 258 Leidenfrost's phenomena... When liquids are thrown upon incandescent metallic surfaces they present remarkable phenomena, which were first observed by Leidenfrost a century ago. 1878 Encycl. Brit. VIII. 728/2 This condition of the liquid is called the spheroidal state, and is often referred to as Leidenfrost's phenomenon. 1977 Sci. Amer. Aug. 126/3 The temperature at which the drops last longest is the Leidenfrost point. 1981 Daily Tel. 3 June 16 The phenomenon which aids fire-walkers is called the Leidenfrost effect. 1986 Nature 13 Mar. 119/3 The Leidenfrost effect created by an insulating layer of water or sweat may also reduce energy transfer to the surface of the body. < as lemmas |
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