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A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/45440

Title: A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice
Authors: Greve, Ralf Browse this author →KAKEN DB
Placidi, Luca Browse this author
Seddik, Hakime Browse this author
Keywords: Ice
polycrystal
flow
anisotropy
continuum mechanics
ice core
Issue Date: Dec-2009
Publisher: Institute of Low Temperature Science, Hokkaido University
Citation: Physics of Ice Core Records II : Papers collected after the 2nd International Workshop on Physics of Ice Core Records, held in Sapporo, Japan, 2-6 February 2007. Edited by Takeo Hondoh
Journal Title: 低温科学
Journal Title(alt): Low Temperature Science
Volume: 68
Issue: Supplement
Start Page: 137
End Page: 148
Abstract: In order to study the mechanical behaviour of polar ice masses, the method of continuum mechanics is used. The newly developed CAFFE model (Continuum-mechanical, Anisotropic Flow model, based on an anisotropic Flow Enhancement faclor) is described, which comprises an anisotropic flow law as well as a fabric evolution equation. The flow law is an extension of the isotropic Glen's flow law, in which anisotropy enters via an enhancement factor that depends on the deformability of the polycrystal. The fabric evolution equation results from an orientational mass balance and includes constitutive relations for grain rotation and recrystallization. The CAFFE model fulfills all the fundamental principles of classical continuum mechanics, is sufficiently simple to allow numerical implementations in ice-flow models and contains only a limited number of free parameters. The applicability of the CAFFE model is demonstrated by a case study for the site of the EPICA (European Project for Ice Coring in Antarctica) ice core in Dronning Maud Land, East Antarctica.
Description: II. Ice-sheet flow model
Type: bulletin (article)
URI: http://hdl.handle.net/2115/45440
Appears in Collections:低温科学 = Low Temperature Science > vol. 68, Supplement Issue

Submitter: 低温科学研究所図書室

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