Saruya Tomotaka, Kurita Kei, Rempel Alan W
Earthquake Research Institute, University of Tokyo, Tokyo 113-0032, Japan.
Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Jun;89(6):060401. doi: 10.1103/PhysRevE.89.060401. Epub 2014 Jun 24.
Premelted water that is adsorbed to particle surfaces and confined to capillary regions remains in the liquid state well below the bulk melting temperature and can supply the segregated growth of ice lenses. Using macroscopic measurements of ice-lens initiation position in step-freezing experiments, we infer how the nanometer-scale thicknesses of premelted films depend on temperature depression below bulk melting. The interfacial interactions between ice, liquid, and soda-lime glass particles exhibit a power-law behavior that suggests premelting in our system is dominated by short-range electrostatic forces. Using our inferred film thicknesses as inputs to a simple force-balance model with no adjustable parameters, we obtain good quantitative agreement between numerical predictions and observed ice-lens thickness. Macroscopic observations of lensing behavior have the potential as probes of premelting behavior in other systems.
吸附在颗粒表面并局限于毛细管区域的预融水在远低于整体熔点温度的情况下仍保持液态，并能为冰晶透镜的分凝生长提供条件。通过在无步冷冻实验中对冰晶透镜起始位置进行宏观测量，我们推断出预融膜的纳米级厚度如何取决于低于整体熔点的温度降低情况。冰、液体和钠钙玻璃颗粒之间的界面相互作用呈现幂律行为，这表明我们系统中的预融主要由短程静电力主导。将我们推断出的膜厚度作为输入到一个无可调参数的简单力平衡模型中，我们在数值预测和观察到的冰晶透镜厚度之间获得了良好的定量一致性。透镜行为的宏观观察有潜力作为其他系统中预融行为的探测手段。
