A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.

Freeze-thaw cycles in soil are driven by water migration, phase transitions, and heat transfer, which themselves are closely coupled variables in the natural environment. To simulate this complex periglacial process at different time and length scales, a multi-physics model was established by solvin...

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Autores principales:	Tianfei Hu, Tengfei Wang
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4bebc3cd97114c7494eb8f578f754799
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id	oai:doaj.org-article:4bebc3cd97114c7494eb8f578f754799
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spelling	oai:doaj.org-article:4bebc3cd97114c7494eb8f578f7547992021-12-02T20:11:05ZA finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.1932-620310.1371/journal.pone.0252680https://doaj.org/article/4bebc3cd97114c7494eb8f578f7547992021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0252680https://doaj.org/toc/1932-6203Freeze-thaw cycles in soil are driven by water migration, phase transitions, and heat transfer, which themselves are closely coupled variables in the natural environment. To simulate this complex periglacial process at different time and length scales, a multi-physics model was established by solving sets of equations describing fluid flow and heat transfer, and a dynamic equilibrium equation for phase changes in moisture. This model considers the effects of water-ice phase changes on the hydraulic and thermal properties of soil and the effect of latent heat during phase transition. These equations were then discretized by using the finite volume method and solved using iteration. The open-source software OpenFOAM was used to generate computational code for simulation of coupled heat and fluid transport during freezing and thawing of soil. A set of laboratory freezing tests considering two thermal boundary conditions were carried out, of which the results were obtained to verify the proposed model. In general, the numerical solutions agree well with the measured data. A railway embankment problem, incorporating soil hydrothermal behavior in response to seasonal variations in surface temperature, was finally solved with the finite volume-based approach, indicating the algorithm's robustness and flexibility.Tianfei HuTengfei WangPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 6, p e0252680 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tianfei Hu Tengfei Wang A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
description	Freeze-thaw cycles in soil are driven by water migration, phase transitions, and heat transfer, which themselves are closely coupled variables in the natural environment. To simulate this complex periglacial process at different time and length scales, a multi-physics model was established by solving sets of equations describing fluid flow and heat transfer, and a dynamic equilibrium equation for phase changes in moisture. This model considers the effects of water-ice phase changes on the hydraulic and thermal properties of soil and the effect of latent heat during phase transition. These equations were then discretized by using the finite volume method and solved using iteration. The open-source software OpenFOAM was used to generate computational code for simulation of coupled heat and fluid transport during freezing and thawing of soil. A set of laboratory freezing tests considering two thermal boundary conditions were carried out, of which the results were obtained to verify the proposed model. In general, the numerical solutions agree well with the measured data. A railway embankment problem, incorporating soil hydrothermal behavior in response to seasonal variations in surface temperature, was finally solved with the finite volume-based approach, indicating the algorithm's robustness and flexibility.
format	article
author	Tianfei Hu Tengfei Wang
author_facet	Tianfei Hu Tengfei Wang
author_sort	Tianfei Hu
title	A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
title_short	A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
title_full	A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
title_fullStr	A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
title_full_unstemmed	A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
title_sort	finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/4bebc3cd97114c7494eb8f578f754799
work_keys_str_mv	AT tianfeihu afinitevolumebasedmodelforthehydrothermalbehaviorofsoilunderfreezethawcycles AT tengfeiwang afinitevolumebasedmodelforthehydrothermalbehaviorofsoilunderfreezethawcycles AT tianfeihu finitevolumebasedmodelforthehydrothermalbehaviorofsoilunderfreezethawcycles AT tengfeiwang finitevolumebasedmodelforthehydrothermalbehaviorofsoilunderfreezethawcycles
_version_	1718374943195922432

A finite volume-based model for the hydrothermal behavior of soil under freeze-thaw cycles.

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