The interdependence of droplet growth and concentration. II. experimental test of droplet growth theory
The interdependence of droplet growth and concentration. II. experimental test of droplet growth theory
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液滴生长和浓度的相互依赖性。
DOI：
10.1016/0021-9797(75)90060-0
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
P. Wagner
中科院分区：
文献类型：
--
作者：
P. Wagner
在本文中，同时测量液滴半径，液滴浓度，和气体压力在一个压力定义的膨胀云室的报告。通过激光束照射冷凝液滴，并且在液滴生长期间监测在可选择的固定散射角下散射的光。得到的光散射曲线显示了一系列的最大值和最小值与米氏理论很好地吻合。根据光散射峰在某些时间相对于时间轴液滴半径的位置和最大值的高度，可以在生长过程中评估液滴浓度。测量了不同液滴浓度和初始过饱和度下的液滴生长曲线。与以前报道的液滴生长理论得到了很好的协议。在液滴生长过程中计算的过饱和时间过程表明，约5毫秒的测量膨胀时间确保了约105/cm 8的液滴浓度的近似干燥绝热条件。
In this paper, simultaneous measurements of droplet radius, droplet concentration, and gas pressure in a pressure-defined expansion cloud chamber are reported. The condensing droplets were illuminated by a laser beam and the light scattered under a selectable fixed scattering angle was monitored during droplet growth. The obtained light scattering curves show series of maxima and minima in good agreement with Mie theory. From the positions of the light scattering peaks with respect to the time axis droplet radius at certain times and from the height of the maxima, droplet concentration can be evaluated during growth process. Droplet growth curves were measured for various droplet concentrations and initial supersaturations. Good agreement with the previously reported droplet growth theory was obtained. The computed time course of supersaturation during droplet growth indicates that the measured expansion time of about 5 msec secures approximately dry adiabatic conditions up to droplet concentrations of some 105/cm8.