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Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
低温科学 = Low Temperature Science >
vol. 68, Supplement Issue >
A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice
| 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
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Submitter: 低温科学研究所図書室
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