Wang Lilin, Wang Zhijun
School of Materials Science and Engineering, Xi'an University of Technology, 710048, Xi'an, China.
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, 710072, Xi'an, China.
Eur Phys J E Soft Matter. 2017 Dec 20;40(12):113. doi: 10.1140/epje/i2017-11601-x.
A long controversy of ice lensing exists in the research of frost heave. By elucidating the mechanical and thermodynamic equilibria at the interface, the thermodynamics of the water/ice interface is revealed from macroscale to microscale for the freezing of colloidal suspensions. The application of the Clapeyron equation is confirmed both at macroscale to microscale via curvature effect. The origin of ice lensing/banding can be initialized from the growth of pore ice in the interpretation of thermodynamics at the interface, even without the traditional mechanical analyses. It is also proposed that the packing status of the porous structure in the particle layer ahead of the water/ice interface determines the ice lensing behaviors. The results presented here show different scenarios compared with previous theoretical investigations of frost heave, and may shed light on the researches of this area.
在冻胀研究中，关于冰透镜现象存在长期的争议。通过阐明界面处的力学和热力学平衡，从宏观尺度到微观尺度揭示了胶体悬浮液冻结时水/冰界面的热力学。通过曲率效应，证实了克拉佩龙方程在宏观尺度到微观尺度上的应用。在界面热力学的解释中，即使不进行传统的力学分析，冰透镜/带状现象的起源也可以从孔隙冰的生长开始。还提出水/冰界面之前颗粒层中多孔结构的堆积状态决定了冰透镜行为。与先前冻胀的理论研究相比，这里给出的结果显示了不同的情况，可能为该领域的研究提供启示。
