Sensitivities of immersion freezing: Reconciling classical nucleation theory and deterministic expressions
Sensitivities of immersion freezing: Reconciling classical nucleation theory and deterministic expressions
复制标题
DOI：
10.1002/grl.50580
复制
发表时间：
2013-06-28
影响因子：
5.2
通讯作者：
Feingold, Graham
中科院分区：
文献类型：
--
作者：
Ervens, Barbara;Feingold, Graham
冰粒数浓度通常是确定性描述的，即冰核是单一的，在给定的温度下明确地发生在活动地点。其他方法基于经典成核理论(CNT)，该理论将冰成核随机描述为时间和成核率的函数。碳纳米管对浸泡冻结的敏感性研究表明，与温度、冰核直径和接触角相比，冰核对时间的敏感性最低。灵敏度一般随着温度的降低而降低。我们的研究有助于调和随机冻结行为和单一冻结行为的明显差异，并建议在广泛的温度和IN参数范围内，基于时间无关的CNT浸泡冻结的表达式可以用于大规模模型。
Ice particle number concentrations are often described deterministically, i.e., ice nucleation is singular and occurs on active sites unambiguously at a given temperature. Other approaches are based on classical nucleation theory (CNT) that describes ice nucleation stochastically as a function of time and nucleation rate. Sensitivity studies of CNT for immersion freezing performed here show that ice nucleation has by far the lowest sensitivity to time as compared to temperature, ice nucleus (IN) diameter, and contact angle. Sensitivities generally decrease with decreasing temperature. Our study helps to reconcile the apparent differences in stochastic and singular freezing behavior, and suggests that over a wide range of temperatures and IN parameters, time-independent CNT-based expressions for immersion freezing may be derived for use in large-scale models.