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A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region
Building roads in permafrost region is challenged because permafrost is sensitive to temperature increase. As an embankment gains/drains heat mostly at the upper surface, accurately modeling the heat transfer in the upper surface is crucial to understand the thermal stability of the road. Popular me...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9345884/ https://www.ncbi.nlm.nih.gov/pubmed/35918455 http://dx.doi.org/10.1038/s41598-022-17529-w |
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author | Wang, Tianyu Yan, Li-E. |
author_facet | Wang, Tianyu Yan, Li-E. |
author_sort | Wang, Tianyu |
collection | PubMed |
description | Building roads in permafrost region is challenged because permafrost is sensitive to temperature increase. As an embankment gains/drains heat mostly at the upper surface, accurately modeling the heat transfer in the upper surface is crucial to understand the thermal stability of the road. Popular methods treat the upper boundary as a temperature-controlled model (TCM), where temperature of the upper surface is set as a sinusoidal function. This simple function, however, fails to identify the influences of solar irradiance, heat convection, and thermal irradiance on the heat transfer on the ground surface. Here we introduce a heat-flux model (HFM) to calculate the heat fluxes at the embankment upper surface and at the adjacent ground surface. HFM-predicted temperature under an embankment is compared against the observed temperature to validate the model, and is compared to the TCM-predicted temperature. While TCM-predicted temperatures and HFM-predicted ones are similar in trend and in pattern, the HFM-predicted temperatures are far more coincident with the observed ones. The pros and cons of both HFM and TCM are discussed. Further studies are expected to use HFM to understand the heat flux components such as solar absorption, heat convection, and thermal irradiance on the temperature of permafrost under embankments. |
format | Online Article Text |
id | pubmed-9345884 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-93458842022-08-04 A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region Wang, Tianyu Yan, Li-E. Sci Rep Article Building roads in permafrost region is challenged because permafrost is sensitive to temperature increase. As an embankment gains/drains heat mostly at the upper surface, accurately modeling the heat transfer in the upper surface is crucial to understand the thermal stability of the road. Popular methods treat the upper boundary as a temperature-controlled model (TCM), where temperature of the upper surface is set as a sinusoidal function. This simple function, however, fails to identify the influences of solar irradiance, heat convection, and thermal irradiance on the heat transfer on the ground surface. Here we introduce a heat-flux model (HFM) to calculate the heat fluxes at the embankment upper surface and at the adjacent ground surface. HFM-predicted temperature under an embankment is compared against the observed temperature to validate the model, and is compared to the TCM-predicted temperature. While TCM-predicted temperatures and HFM-predicted ones are similar in trend and in pattern, the HFM-predicted temperatures are far more coincident with the observed ones. The pros and cons of both HFM and TCM are discussed. Further studies are expected to use HFM to understand the heat flux components such as solar absorption, heat convection, and thermal irradiance on the temperature of permafrost under embankments. Nature Publishing Group UK 2022-08-02 /pmc/articles/PMC9345884/ /pubmed/35918455 http://dx.doi.org/10.1038/s41598-022-17529-w Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Wang, Tianyu Yan, Li-E. A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
title | A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
title_full | A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
title_fullStr | A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
title_full_unstemmed | A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
title_short | A heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
title_sort | heat-flux upper boundary for modeling temperature of soils under an embankment in permafrost region |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9345884/ https://www.ncbi.nlm.nih.gov/pubmed/35918455 http://dx.doi.org/10.1038/s41598-022-17529-w |
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