Application of the Generalized Clapeyron Equation to Freezing Point Depression and Unfrozen Water Content

doi:10.1029/2018WR023221

CORC > 武汉植物园 > 中国科学院武汉植物园

	Application of the Generalized Clapeyron Equation to Freezing Point Depression and Unfrozen Water Content
	Tian, Huihui 2; Wei, Houzhen 2; Lai, Yuanming 1; Wei, Changfu 2; Zhou, Jiazuo 2
刊名	WATER RESOURCES RESEARCH
	2018-11-01
卷号	54 期号:11 页码:9412-9431
ISSN号	0043-1397
DOI	10.1029/2018WR023221
英文摘要	Freezing point and unfrozen water content are key parameters in modeling the heat and mass transfer under the cyclic change of atmosphere temperature. It is theoretically revealed the relation between the measured pore pressure and true pore pressure with physicochemical interactions. A new generalized Clapeyron equation is derived, which addresses the relationship among the measured pore water, ice-liquid capillary pressure, and pore solution concentration for the frozen soil. The generalized Clapeyron equation is applied to derive the expressions for the freezing point and unfrozen water content in frozen soils at various thermodynamical conditions. The freezing point of soil is calculated and compared with the experimental results, showing that the freezing point depression becomes more pronounced as water content decreases and solution concentration increases. It is also shown that the NaCl solution with relatively high concentration in soil pore approximates the ideal dilute solution while Na2CO3 and some other solutions in soil are significantly different than the ideal dilute solution. Upon assuming the unfrozen water content is only determined by the capillary pressure, the Clapeyron equation links the soil water characteristic curve into the soil freezing characteristic curve. The unfrozen water content in the saline frozen soil and the frozen soil under overburden pressure is also calculated according to the expression derived from the generalized Clapeyron equation.
资助项目	National Key Research and Development Program of China[2018YFC0809605] ; National Science Foundation of China (NSFC)[41572293] ; National Science Foundation of China (NSFC)[41572295] ; National Science Foundation of China (NSFC)[41602312] ; Open Foundation of the State Key Laboratory of Frozen Soil Engineering[SKLFSE201502] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2015272]
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000453369400047
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/6407]
专题	中国科学院武汉植物园
通讯作者	Wei, Changfu
作者单位	1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, Northwest Inst Ecoenvironm & Resources, Lanzhou, Gansu, Peoples R China 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Tian, Huihui,Wei, Houzhen,Lai, Yuanming,et al. Application of the Generalized Clapeyron Equation to Freezing Point Depression and Unfrozen Water Content[J]. WATER RESOURCES RESEARCH,2018,54(11):9412-9431.
APA	Tian, Huihui,Wei, Houzhen,Lai, Yuanming,Wei, Changfu,&Zhou, Jiazuo.(2018).Application of the Generalized Clapeyron Equation to Freezing Point Depression and Unfrozen Water Content.WATER RESOURCES RESEARCH,54(11),9412-9431.
MLA	Tian, Huihui,et al."Application of the Generalized Clapeyron Equation to Freezing Point Depression and Unfrozen Water Content".WATER RESOURCES RESEARCH 54.11(2018):9412-9431.