Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts
Fully coupled heat transfer modeling during the thawing of frozen rock clefts yields melting rates that differ from those predicted by conventional conduction-based models. This research develops a conceptual model of a karst system subject to mountain permafrost supported by a numerical simulation...
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ftcopernicus:oai:publications.copernicus.org:egusphere115357 2024-02-04T10:01:07+01:00 Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts Sedaghatkish, Amir Doumenc, Frédéric Jeannin, Pierre-Yves Luetscher, Marc 2024-01-02 application/pdf https://doi.org/10.5194/egusphere-2023-2349 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2349/ eng eng doi:10.5194/egusphere-2023-2349 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2349/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2023-2349 2024-01-08T17:24:18Z Fully coupled heat transfer modeling during the thawing of frozen rock clefts yields melting rates that differ from those predicted by conventional conduction-based models. This research develops a conceptual model of a karst system subject to mountain permafrost supported by a numerical simulation incorporating free water convection. The numerical simulations rely on the apparent heat capacity method and the Darcy approach for energy and momentum equations. Notably, the anomalous behavior of water between 0 and 4 ℃ causes warmer meltwater to flow downwards, increasing the melting rate by approximately an order of magnitude as compared to conventional models that disregard free convection. The model outcomes are compared qualitatively with field data from Monlesi ice cave (Switzerland) and confirm the close agreement between the proposed model and real-world observations. Text Ice permafrost Copernicus Publications: E-Journals |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Fully coupled heat transfer modeling during the thawing of frozen rock clefts yields melting rates that differ from those predicted by conventional conduction-based models. This research develops a conceptual model of a karst system subject to mountain permafrost supported by a numerical simulation incorporating free water convection. The numerical simulations rely on the apparent heat capacity method and the Darcy approach for energy and momentum equations. Notably, the anomalous behavior of water between 0 and 4 ℃ causes warmer meltwater to flow downwards, increasing the melting rate by approximately an order of magnitude as compared to conventional models that disregard free convection. The model outcomes are compared qualitatively with field data from Monlesi ice cave (Switzerland) and confirm the close agreement between the proposed model and real-world observations. |
format |
Text |
author |
Sedaghatkish, Amir Doumenc, Frédéric Jeannin, Pierre-Yves Luetscher, Marc |
spellingShingle |
Sedaghatkish, Amir Doumenc, Frédéric Jeannin, Pierre-Yves Luetscher, Marc Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
author_facet |
Sedaghatkish, Amir Doumenc, Frédéric Jeannin, Pierre-Yves Luetscher, Marc |
author_sort |
Sedaghatkish, Amir |
title |
Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
title_short |
Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
title_full |
Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
title_fullStr |
Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
title_full_unstemmed |
Modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
title_sort |
modeling the effect of free convection on permafrost melting-rates in frozen rock-clefts |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2023-2349 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2349/ |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-2349 https://egusphere.copernicus.org/preprints/2024/egusphere-2023-2349/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-2349 |
_version_ |
1789966783612977152 |