A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice
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...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Institute of Low Temperature Science, Hokkaido University
|
Subjects: | |
Online Access: | http://hdl.handle.net/2115/45440 |
id |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/45440 |
---|---|
record_format |
openpolar |
spelling |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/45440 2023-05-15T13:42:37+02:00 A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice Greve, Ralf Placidi, Luca Seddik, Hakime http://hdl.handle.net/2115/45440 eng eng Institute of Low Temperature Science, Hokkaido University 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 http://hdl.handle.net/2115/45440 Ice polycrystal flow anisotropy continuum mechanics ice core 400 bulletin (article) fthokunivhus 2022-11-18T01:02:09Z 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. II. Ice-sheet flow model Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land East Antarctica EPICA ice core Ice Sheet Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) East Antarctica Dronning Maud Land |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Ice polycrystal flow anisotropy continuum mechanics ice core 400 |
spellingShingle |
Ice polycrystal flow anisotropy continuum mechanics ice core 400 Greve, Ralf Placidi, Luca Seddik, Hakime A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice |
topic_facet |
Ice polycrystal flow anisotropy continuum mechanics ice core 400 |
description |
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. II. Ice-sheet flow model |
format |
Article in Journal/Newspaper |
author |
Greve, Ralf Placidi, Luca Seddik, Hakime |
author_facet |
Greve, Ralf Placidi, Luca Seddik, Hakime |
author_sort |
Greve, Ralf |
title |
A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice |
title_short |
A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice |
title_full |
A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice |
title_fullStr |
A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice |
title_full_unstemmed |
A Continuum-Mechanical Model for the Flow of Anisotropic Polar Ice |
title_sort |
continuum-mechanical model for the flow of anisotropic polar ice |
publisher |
Institute of Low Temperature Science, Hokkaido University |
url |
http://hdl.handle.net/2115/45440 |
geographic |
East Antarctica Dronning Maud Land |
geographic_facet |
East Antarctica Dronning Maud Land |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica EPICA ice core Ice Sheet |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica EPICA ice core Ice Sheet |
op_relation |
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 http://hdl.handle.net/2115/45440 |
_version_ |
1766170119412645888 |