Dendritic Growth Model Involving Interface Kinetics for Supercooled Water
Dendritic Growth Model Involving Interface Kinetics for Supercooled Water
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DOI：
10.1021/acs.langmuir.9b00214
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发表时间：
2019-04-16
期刊：
影响因子：
3.9
通讯作者：
Chen, Min
中科院分区：
文献类型：
--
作者：
Wang, Tianbao;Lu, Yongjun;Chen, Min
对过冷水滴中冰的枝晶生长进行了理论和实验研究。测得的冰的树枝状生长速度显示出良好的协议与预测的Langer和Muller-Krumbhaar（LM-K）的增长模型在过冷度小于7 K，而在后者中观察到的液滴进一步过冷增加高估。因此，考虑界面动力学的影响，对LM-K枝晶生长模型进行了修正。在改进的模型中，枝晶生长在边界稳定极限下，并与液固界面扩散相耦合，引入界面动力学过冷度来预测枝晶生长速度。界面动力学因子的确定通过拟合的实验枝晶生长速度的框架内的修改后的模型。这种对LM-K模型的修正很好地描述了过冷到25 K的水中冰的枝晶生长。该模型为高过冷度条件下冰的枝晶生长提供了一种解决方案，可为工程领域的结冰问题研究提供可靠的输入。
The dendritic growth of ice in supercooled water droplets is studied theoretically and experimentally. The measured dendritic growth velocity of ice shows a good agreement with the prediction of the Langer and Muller-Krumbhaar (LM-K) growth model at supercoolings less than 7 K, whereas an increasing overestimation in the latter is observed as the droplets are further supercooled. Therefore, the LM-K dendritic growth model is modified by considering the influence of interface kinetics. In the modified model, a dendrite grows in the limit of marginal stability coupled with diffusion at the liquid-solid interface, and the interface kinetics supercooling is introduced to predict the dendritic growth velocity. The interface kinetics factor is determined by fitting the experimental dendritic growth velocity within the framework of the modified model. This modification to the LM-K model well describes the dendritic growth of ice in water supercooled up to 25 K. It provides a solution to the dendritic growth of ice in the high-supercooling regime and can serve as a reliable input for studies on icing problems in engineering fields.