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DOI	10.1016/j.ijheatmasstransfer.2015.03.044
	Heat and mass transfer effects of ice growth mechanisms in a fully saturated soil
	Wu, Daoyong; Lai, Yuanming; Zhang, Mingyi
发表日期	2015
ISSN	0017-9310
EISSN	1879-2189
起始页码	699
结束页码	709
卷号	86
英文摘要	To control heat and mass transfer during freezing, it is essential to understand the phase change behavior of ice crystals. However, limited research has been performed on the coupling effects involved in the kinetics of ice crystal nucleation and growth with fluid flow and heat transfer in porous media. In this paper, the conditions of nucleation and crystal growth, which must be met during the ice crystallization process, were studied. In the process of water freezing, we thought water activity is the inducing factor of the ice-water phase transformation. Based on the 'water-activity criterion', a macro kinetic model of ice crystal growth was established, which is useful to quantify the processes of nucleation and growth coupled with fluid flow and heat transfer. The driving force of moisture migration is the chemical potential gradient under different temperatures based on thermodynamics, which is different from the conventional form obtained from Darcy's law. In addition, a mathematical model coupling the heat-fluid transport in a fully saturated soil with phase change was proposed. Because the problem is significantly nonlinear, a numerical method for its solution was applied, and the temperature, moisture and frost heave of a soil column during the freezing process were calculated. Validation of the model is illustrated by comparisons between the simulation and experimental results. From this study, it is found that temperature has a great influence on the distribution of the total water content during ice crystallization and moisture migration, and the relationship between water velocity and temperature can be used to explain the distribution of the water content. The predicted values are consistent with the experimental data and verify the accuracy of the crystallization kinetics approach that couples heat and mass transfer in porous media. (C) 2015 Elsevier Ltd. All rights reserved.
英文关键词	Porous media; Crystallization kinetics; Ice growth mechanisms; Heat and mass transfer
语种	英语
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS关键词	POROUS-MEDIA ; WATER ACTIVITY ; PHASE-CHANGE ; FROZEN SOIL ; CRYSTALLIZATION ; TRANSPORT ; SIMULATION ; SYSTEM ; SLURRY ; NUCLEATION
WOS记录号	WOS:000355029900069
来源期刊	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239495
作者单位	[Wu, Daoyong; Lai, Yuanming; Zhang, Mingyi] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China; [Wu, Daoyong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Lai, Yuanming] Lanzhou Jiaotong Univ, Sch Civil Engn, Lanzhou 730070, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Daoyong,Lai, Yuanming,Zhang, Mingyi. Heat and mass transfer effects of ice growth mechanisms in a fully saturated soil[J],2015,86.
APA	Wu, Daoyong,Lai, Yuanming,&Zhang, Mingyi.(2015).Heat and mass transfer effects of ice growth mechanisms in a fully saturated soil.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,86.
MLA	Wu, Daoyong,et al."Heat and mass transfer effects of ice growth mechanisms in a fully saturated soil".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 86(2015).