The experimental study on freezing of supercooled water using metallic surface
The experimental study on freezing of supercooled water using metallic surface
复制标题
利用金属表面冻结过冷水的实验研究
DOI：
10.1016/s0140-7007(01)00038-x
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Hidekazu Suto
中科院分区：
文献类型：
--
作者：
S. Okawa;A. Saito;Hidekazu Suto
通过实验研究了过冷水在金属板上的冻结。首先，选择镀金表面作为金属表面，因为该表面的特性随时间变化很小。进行了不同冷却速率下的冻结实验，计算了单位时间内单位表面积的冻结概率。发现该概率与冷却速率无关。其次，为了阐明氧化对过冷水结冰的影响，选择电解抛光的铜表面并研究结冰概率随时间的变化。需要大量的实验数据才能获得准确的概率值，但在表面特性发生变化之前不可能执行此操作。因此，为了在短时间内覆盖较宽范围的冷冻过冷度，在不同的冷却速率下进行了实验。研究发现，表面的氧化抑制了表面过冷水的冻结。通过将结果与镀金表面的结果进行比较，获得了表达表面特性的参数。
Freezing of supercooled water on a metallic plate was studied, experimentally. First of all, a gold plated surface was selected as a metallic surface because the surface has very little change in the characteristics of the surface against time. The experiments on freezing under various cooling rates were carried out and the probability of freezing per unit surface area per unit time interval was calculated. It was found that the probability was independent of the cooling rate. Secondly, in order to clarify the effect of oxidation on freezing of supercooled water, an electrolytically polished copper surface was selected and a time variation of the probability of freezing was investigated. A large number of experimental data is required to obtain an accurate value for the probability, but it is impossible to perform it before the characteristics of the surface changes. Hence, in order to cover a wide range of the degree of supercooling at freezing in a short period of time, experiments were carried out under various cooling rates. It was found that the oxidation of the surface restrained the supercooled water on the surface from freezing. By comparing the results with the one for a gold plated surface, a parameter was obtained to express the characteristics of the surface.