Thermomechanical polythermal ice-sheet model
Based on the physical processes governing the motion and dynamics of poly-thermal ice sheets, we distinguish two regions; the cold region, where the ice temperature is below the melting point, and the temperate region, where the ice temperature is exactly equal to the melting point, leading to the p...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_8714 2023-05-15T16:40:21+02:00 Thermomechanical polythermal ice-sheet model Termomechanický model polytermálního ledovce Souček, O. 2006 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_8714 eng eng Deutsches GeoForschungsZentrum GFZ info:eu-repo/semantics/altIdentifier/doi/10.2312/GFZ.b103-06137 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:kobv:b103-06137 https://gfzpublic.gfz-potsdam.de/pubman/item/item_8714 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/3.0/de/ CC-BY-NC-SA Scientific Technical Report STR info:eu-repo/semantics/report 2006 ftgfzpotsdam https://doi.org/10.2312/GFZ.b103-06137 2022-09-14T05:56:24Z Based on the physical processes governing the motion and dynamics of poly-thermal ice sheets, we distinguish two regions; the cold region, where the ice temperature is below the melting point, and the temperate region, where the ice temperature is exactly equal to the melting point, leading to the presence of a water fraction. This work focuses on the analysis and description of the temperate zone on the basis of rational thermo-dynamics of reacting mixtures. The balance laws for the ice-water mixture, that is the mass balance, balance of linear and angular momenta, energy and entropy, are discussed. A physical model for a polythermal ice sheet is then established, including appropriate boundary and transition conditions. The resulting formulation is convenient for numerical implementation. Numerical examples are carried out for a stationary 2-D case and the results of the present and traditional formulations are compared. Report Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
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Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Based on the physical processes governing the motion and dynamics of poly-thermal ice sheets, we distinguish two regions; the cold region, where the ice temperature is below the melting point, and the temperate region, where the ice temperature is exactly equal to the melting point, leading to the presence of a water fraction. This work focuses on the analysis and description of the temperate zone on the basis of rational thermo-dynamics of reacting mixtures. The balance laws for the ice-water mixture, that is the mass balance, balance of linear and angular momenta, energy and entropy, are discussed. A physical model for a polythermal ice sheet is then established, including appropriate boundary and transition conditions. The resulting formulation is convenient for numerical implementation. Numerical examples are carried out for a stationary 2-D case and the results of the present and traditional formulations are compared. |
format |
Report |
author |
Souček, O. |
spellingShingle |
Souček, O. Thermomechanical polythermal ice-sheet model |
author_facet |
Souček, O. |
author_sort |
Souček, O. |
title |
Thermomechanical polythermal ice-sheet model |
title_short |
Thermomechanical polythermal ice-sheet model |
title_full |
Thermomechanical polythermal ice-sheet model |
title_fullStr |
Thermomechanical polythermal ice-sheet model |
title_full_unstemmed |
Thermomechanical polythermal ice-sheet model |
title_sort |
thermomechanical polythermal ice-sheet model |
publisher |
Deutsches GeoForschungsZentrum GFZ |
publishDate |
2006 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_8714 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Scientific Technical Report STR |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.2312/GFZ.b103-06137 info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:kobv:b103-06137 https://gfzpublic.gfz-potsdam.de/pubman/item/item_8714 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/3.0/de/ |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.2312/GFZ.b103-06137 |
_version_ |
1766030733999079424 |