干旱区生态环境知识资源中心(Arid): Isothermal diffusion of water vapor in unsaturated soils based on Fick's second law

Arid

DOI	10.1007/s11771-020-4427-6
	Isothermal diffusion of water vapor in unsaturated soils based on Fick's second law
	Liu, Fei-fei; Mao, Xue-song; Zhang, Jian-xun; Wu, Qian; Li, Ying-ying; Xu, Cheng
通讯作者	Mao, XS
来源期刊	JOURNAL OF CENTRAL SOUTH UNIVERSITY
ISSN	2095-2899
EISSN	2227-5223
出版年	2020
卷号	27 期号:7 页码:2017-2031
英文摘要	In arid regions, water vapor diffusion predominates the total water migration in unsaturated soil, which significantly influences agriculture and engineering applications. With the aim of revealing the diffusion mechanism of water vapor in unsaturated soil, a water vapor migration test device was developed to conduct the water vapor migration indoor test. The test results demonstrate that the characteristics of water vapor diffusion in unsaturated soil conformed to Fick's second law. A mathematical model for water vapor diffusion under isothermal conditions in unsaturated soil was established based on Fick's law. Factors including the initial moisture content gradient, initial moisture content distribution, soil type and temperature that affect the water vapor diffusion coefficient were analyzed. The results show that there was good agreement between the moisture content calculated by the mathematical model and obtained by the indoor experiment. The vapor diffusion coefficient increased with increasing initial moisture content gradient and temperature. When the initial moisture content gradient is constant, the vapor diffusion coefficient increases with the increase of matrix suction ratio in dry and wet soil section. The effect of soil type on the water vapor diffusion coefficient was complex, as both the moisture content and soil particle sizes affected the water vapor diffusion.
英文关键词	water vapor diffusion coefficient unsaturated soil mathematical model initial moisture content gradient initial moisture content distribution soil type temperature
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000557377300010
WOS关键词	HEAT-TRANSPORT ; COUPLED WATER ; LIQUID WATER ; EVAPORATION ; MIGRATION ; MOISTURE ; MOVEMENT ; LAYER
WOS类目	Metallurgy & Metallurgical Engineering
WOS研究方向	Metallurgy & Metallurgical Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325505
作者单位	[Liu, Fei-fei; Mao, Xue-song; Zhang, Jian-xun; Wu, Qian; Li, Ying-ying; Xu, Cheng] Changan Univ, Sch Highway, Xian 710064, Peoples R China; [Li, Ying-ying] Luoyang Rail Transit Grp Co Ltd, Luoyang 471023, Peoples R China
推荐引用方式 GB/T 7714	Liu, Fei-fei,Mao, Xue-song,Zhang, Jian-xun,et al. Isothermal diffusion of water vapor in unsaturated soils based on Fick's second law[J],2020,27(7):2017-2031.
APA	Liu, Fei-fei,Mao, Xue-song,Zhang, Jian-xun,Wu, Qian,Li, Ying-ying,&Xu, Cheng.(2020).Isothermal diffusion of water vapor in unsaturated soils based on Fick's second law.JOURNAL OF CENTRAL SOUTH UNIVERSITY,27(7),2017-2031.
MLA	Liu, Fei-fei,et al."Isothermal diffusion of water vapor in unsaturated soils based on Fick's second law".JOURNAL OF CENTRAL SOUTH UNIVERSITY 27.7(2020):2017-2031.