Collision Characteristics of Freely Falling Water Drops.
Collision Characteristics of Freely Falling Water Drops.
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DOI：
10.1126/science.150.3697.695
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发表时间：
1965-11
期刊：
影响因子：
56.9
通讯作者：
R. Gunn
中科院分区：
文献类型：
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作者：
R. Gunn
与雨的形成和随后的自由降落有关的基本物理过程尚未得到充分的研究，许多特征仍然知之甚少。与云转变成雨有关的基本问题仍然没有答案。关于雨的电气化及其与雷暴电的关系的其他基本问题突出了我们目前对降水机制的理解中的巨大差距。几年来已经很清楚，雨滴在碰撞过程中和碰撞后的行为很可能对描述飞行特性有重要的影响。起初，人们并不清楚如何通过实验来解决这些问题，以产生有意义的数据。然而，特殊设备的最近发展已经使得本文描述的这些过程的探索成为可能。我的实验室在10多年前就尝试了这项技术的要素，但只取得了有限的成功，因为连续下落的液滴位置的再现性不足。这些早期的测量试图使用如此小的液滴，以至于固有的不规则性在很大程度上被破坏，
The basic physical processes associated with the formation and subsequent free fall of rain have been in-adequately studied, and many features are still poorly understood. Basic ques-tions related to theconversion of clouds into rain remain unanswered. Other fundamental questions regarding the electrification ofrain and its relation to thunderstormelectricity em-phasize the largegaps in our present understanding of precipitation me-chanics. It has been clear for some years that the behavior of raindrops during and after collision is likely to have important consequences for the description of rainfallcharacteristics. It was not clear at first how these problems could be attacked experimentally to produce meaningful data. However, recent development of special apparatus has made possible an exploration of these processes, which are described herein. The elements of the-technique adopted in my laboratory were tried out more than 10 years ago, but only limited success was achieved because the reproducibility of position of successive falling drops was inadequate. These earlymeasurements attempted to use drops so small that the inherent irregularitieslargely de-