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Simulation of cryovolcanism on Saturn's moon Enceladus with the Green-Naghdi theory of thermoelasticity

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タイトル: Simulation of cryovolcanism on Saturn's moon Enceladus with the Green-Naghdi theory of thermoelasticity
その他のタイトル: ”Green-Naghdi”熱弾性理論を用いた土星の衛星”エンケラドゥス”の氷火山噴出活動のシミュレーション
著者: Bargmann, Swantje 著作を一覧する
Greve, Ralf 著作を一覧する
Steinmann, Paul 著作を一覧する
キーワード: Enceladus
Cryovolcanism
Heat transport
Thermoelasticity
Green-Naghdi theory
発行日: 2008年 8月10日
出版者: Japanese Society of Snow and Ice
誌名: Bulletin of Glaciological Research
巻: 26
開始ページ: 23
終了ページ: 32
抄録: In 2005, the Cassini spacecraft proved the existence of cryovolcanism, i.e., the icy counterpart of volcanism on Earth, on Saturn's moon Enceladus during its close fly-bys. In particular, water-rich plume venting was discovered in the south polar region. Thus, Enceladus was found to be one out of three outer solar bodies to be geologically active. This contribution is concerned with the modeling and computation of this phenomenon. For the underlying thermoelastic description of ice at cryogenic temperatures, we resort to the Green-Naghdi approach. The Green-Naghdi theory includes the classical Fourier approach, but, in addition to that, it is a lot more general as it also allows for other types of heat propagation. The numerical implementation is carried out with the help of the finite element method. Results show that lateral spreading of internal and surface warming away from an active volcanic vent increases strongly with increasing contribution of the non-classical heat flux. Agreement with available high-resolution surface temperature data based on infrared spectrometry seems to be best if the non-classical heat flux contributes significantly to the total heat transport. Complementary laboratory studies would be required in order to strengthen this speculative, yet promising idea.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/34791
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: Greve Ralf

 

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