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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Tidal heating ： ウィキペディア英語版 Tidal heating Tidal heating (also known as tidal working) occurs through the tidal friction processes: orbital and rotational energy are dissipated as heat in either the surface ocean or interior of a planet or satellite. Io, a moon of Jupiter, is the most volcanically active body in the solar system, with no impact craters surviving on its surface. This is because the tidal force of Jupiter deforms Io; the eccentricity of Io's orbit (a consequence of its participation in a Laplace resonance) causes the height of Io's tidal bulge to vary significantly (by up to 100 m) over the course of an orbit; the friction from this tidal flexing then heats up its interior. A similar but weaker process is theorised to have melted the lower layers of the ice surrounding the rocky mantle of Jupiter's next large moon, Europa. Saturn's moon Enceladus is similarly thought to have a liquid water ocean beneath its icy crust. The water vapor geysers which eject material from Enceladus are thought to be powered by friction generated within this moon's shifting ice crust.〔Peale, S.J. Tidally induced volcanism. Celest. Mech. & Dyn. Astr. 87, 129– 155, 2003.〕 The total amount of tidal heating $q\_$ is given by :$q\_\; =\; 63$ $\backslash rho$ $n^5$ $r^4$ $e^2\; /\; (38$ $\backslash mu$ $Q)$ where $\backslash rho$ is the mean density of the satellite, $n$ is the mean orbital motion, $r$ is the satellite’s radius, $e$ is the eccentricity of the orbit, $\backslash mu$ is the shear modulus, and $Q$ is a dimensionless dissipation factor. The role of tidal heating is sometimes expressed by dimensionless number C equal to quotient of tidal heating and total internal heating.〔Czechowski, L., 2006, Parameterized model of convection driven by tidal and radiogenic heating, Adv. Space Res, 38, 4, 788-793〕 ==See also== * Cryovolcano * Tidal acceleration * Tidal locking * Tidal heating of Io 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tidal heating」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.