干旱区生态环境知识资源中心(Arid): Numerical Modelling of Vapour-Ice Desublimation Process in Unsaturated Freezing Soils

Arid

DOI	10.1007/978-981-13-2221-1_61
	Numerical Modelling of Vapour-Ice Desublimation Process in Unsaturated Freezing Soils
	Teng, Jidong; Shan, Feng; Zhang, Sheng; Sheng, Daichao
通讯作者	Teng, JD (corresponding author), Cent South Univ, Changsha 410075, Peoples R China.
会议名称	8th International Congress on Environmental Geotechnics (ICEG)
会议日期	OCT 28-NOV 01, 2018
会议地点	Hangzhou, PEOPLES R CHINA
英文摘要	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.
英文关键词	Vapour-ice desublimation Unsaturated soil Diffusion Numerical model
来源出版物	PROCEEDINGS OF THE 8TH INTERNATIONAL CONGRESS ON ENVIRONMENTAL GEOTECHNICS, VOL 1: TOWARDS A SUSTAINABLE GEOENVIRONMENT
ISSN	1863-5520
EISSN	1863-5539
出版年	2019
页码	560-568
ISBN	978-981-13-2221-1; 978-981-13-2220-4
出版者	SPRINGER-VERLAG SINGAPORE PTE LTD
类型	Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000607209700061
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/370237
作者单位	[Teng, Jidong; Shan, Feng; Zhang, Sheng; Sheng, Daichao] Cent South Univ, Changsha 410075, Peoples R China; [Sheng, Daichao] Univ Newcastle, Callaghan, NSW 2308, Australia
推荐引用方式 GB/T 7714	Teng, Jidong,Shan, Feng,Zhang, Sheng,et al. Numerical Modelling of Vapour-Ice Desublimation Process in Unsaturated Freezing Soils[C]:SPRINGER-VERLAG SINGAPORE PTE LTD,2019:560-568.