过冷水膜流条件下冰生长中波纹形成理论模型的数值和实验验证
Numerical and experimental verification of a theoretical model of ripple formation in ice growth under supercooled water film flow
摘要：
对于具有自由表面的流动过冷液体薄膜晶体生长过程中凝固前沿的形态不稳定性，如冰柱表面的环状波纹，人们知之甚少。波纹的长度尺度接近1厘米。提出了两种波纹形成机理的理论模型。然而，这些模型导致相当不同的结果，因为在固-液界面和液-气表面的边界条件的差异。在这两个模型中使用的假设的有效性进行了数值研究和一些理论预测与实验进行了比较。
英文摘要：
Little is known about morphological instability of a solidification front during the crystal growth of a thin film of flowing supercooled liquid with a free surface: for example, the ring-like ripples on the surface of icicles. The length scale of the ripples is nearly 1 cm. Two theoretical models for the ripple formation mechanism have been proposed. However, these models lead to quite different results because of differences in the boundary conditions at the solid-liquid interface and liquid-air surface. The validity of the assumption used in the two models is numerically investigated and some of the theoretical predictions are compared with experiments.
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