Numerical modelling of vapour-ice desublimation process in unsaturated freezing soils

Teng, J; Shan, F; Zhang, S; Sheng, D

Numerical modelling of vapour-ice desublimation process in unsaturated freezing soils

Teng, J Shan, F

Zhang, S Sheng, D

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Publisher:: Springer
Publication Type:: Chapter
Citation:: Proceedings of the 8th International Congress on Environmental Geotechnics, 2019, 1, pp. 560-568
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Teng, J
dc.contributor.author	Shan, F https://orcid.org/0000-0001-7497-6768
dc.contributor.author	Zhang, S
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.contributor.editor	Zhan, L
dc.contributor.editor	Chen, Y
dc.contributor.editor	Bouazza, A
dc.date.accessioned	2023-01-31T06:01:21Z
dc.date.available	2023-01-31T06:01:21Z
dc.date.issued	2019-01-01
dc.identifier.citation	Proceedings of the 8th International Congress on Environmental Geotechnics, 2019, 1, pp. 560-568
dc.identifier.isbn	9789811322204
dc.identifier.uri	http://hdl.handle.net/10453/165680
dc.description.abstract	© Springer Nature Singapore Pte Ltd. 2019. Recent studies reveal that ice formation via vapour-ice desublimation in unsaturated freezing soils can lead to damage to infrastructures. Actually, the role of vapor flow in a freezing soils is unclear, and it is usually ignored when analyzing water migration process. In this study, a theoretical framework is established to formulate the coupled thermal and hydrological process, where the vapour diffusion governs the mass transfer process. The new model is designed to avoid using the local equilibrium assumption and the hydraulic relations that accounts for liquid water flow. This model contains 6 undetermined variables that are interacted in the 6 governing equations. In order to validate the numerical formulations/codes, a series of laboratory experiments are performed on a coarse sand which is not considered as frost susceptibility soil. The computed results show that the proposed model can indeed reproduce the unusual moisture accumulation observed in relatively dry soils, while the result agree well with the experimental date. This model provides an explanation for coupled movement of heat and moisture in cold and arid regions.
dc.format.extent	102
dc.language	en
dc.publisher	Springer
dc.relation.ispartof	Proceedings of the 8th International Congress on Environmental Geotechnics
dc.relation.ispartofseries	Environmental Science and Engineering
dc.relation.isbasedon	10.1007/978-981-13-2221-1_61
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Numerical modelling of vapour-ice desublimation process in unsaturated freezing soils
dc.type	Chapter
utslib.citation.volume	1
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2023-01-31T06:01:20Z
pubs.place-of-publication	Switzerland
pubs.publication-status	Published
pubs.volume	1
dc.location	Switzerland

Abstract:

© Springer Nature Singapore Pte Ltd. 2019. Recent studies reveal that ice formation via vapour-ice desublimation in unsaturated freezing soils can lead to damage to infrastructures. Actually, the role of vapor flow in a freezing soils is unclear, and it is usually ignored when analyzing water migration process. In this study, a theoretical framework is established to formulate the coupled thermal and hydrological process, where the vapour diffusion governs the mass transfer process. The new model is designed to avoid using the local equilibrium assumption and the hydraulic relations that accounts for liquid water flow. This model contains 6 undetermined variables that are interacted in the 6 governing equations. In order to validate the numerical formulations/codes, a series of laboratory experiments are performed on a coarse sand which is not considered as frost susceptibility soil. The computed results show that the proposed model can indeed reproduce the unusual moisture accumulation observed in relatively dry soils, while the result agree well with the experimental date. This model provides an explanation for coupled movement of heat and moisture in cold and arid regions.

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http://hdl.handle.net/10453/165680