Time-series characteristics and geometric structures of drop-size distribution density in dropwise condensation
Time-series characteristics and geometric structures of drop-size distribution density in dropwise condensation
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DOI：
10.1016/j.ijheatmasstransfer.2014.04.041
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发表时间：
2014-09
影响因子：
5.2
通讯作者：
N. Watanabe;M. Aritomi;A. Machida
中科院分区：
文献类型：
--
作者：
N. Watanabe;M. Aritomi;A. Machida
在本文中，我们主要研究滴状凝聚理论中的一个重要组成部分--液滴尺寸分布密度。为了在已有模型的基础上定量地阐明液滴尺寸分布密度的特征，利用发展起来的图像处理技术对一系列液滴状凝结过程(即成核、生长、合并和分离)中的液滴尺寸分布密度的时间序列特征和几何结构进行了实验研究。此外，还验证了现有的时间平均液滴尺寸分布密度模型的适用性。此外，还用分形几何理论解释了与液滴尺寸分布密度密切相关的液滴表面覆盖率的时间序列。
In this paper, we focused on a drop-size distribution density, which is one of the important components in the dropwise condensation theory. With an aim of quantitatively clarifying the characteristic of drop-size distribution density in reference to the existing models, the time-series characteristics and geometric structures of drop-size distribution densities in a set of processes of dropwise condensation (i.e. nucleation, growth, coalescence and departure) had been experimentally clarified by the developed image processing technique. In addition, applicability of existing models of the time-averaged drop-size distribution densities had been verified. Furthermore, the time-series fraction of surface coverage by drops, which is closely related to the drop-size distribution density, had been elucidated in terms of fractal geometry theory.