Dispersion of Droplet Clouds in Turbulence.
Dispersion of Droplet Clouds in Turbulence.
复制标题
湍流中液滴云的色散。
DOI：
10.1103/physrevlett.117.164501
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发表时间：
2016
影响因子：
8.6
通讯作者：
W. van de Water
中科院分区：
文献类型：
--
作者：
Humberto Bocanegra Evans;N. Dam;G. Bertens;D. D. van der Voort;W. van de Water
我们通过高速图像增强的视频记录来测量湍流空气中单分散的磷光液滴云的绝对分散度。激光激发允许以完全非侵入性的方式初步制备清晰的铅笔形状的发光液滴云。我们发现云的弥散比流体元素的弥散更快。我们推测，惯性液滴云的优先聚集是增强弥散的原因。
We measure the absolute dispersion of clouds of monodisperse, phosphorescent droplets in turbulent air by means of high-speed image-intensified video recordings. Laser excitation allows the initial preparation of well-defined, pencil-shaped luminous droplet clouds in a completely nonintrusive way. We find that the dispersion of the clouds is faster than the dispersion of fluid elements. We speculate that preferential concentration of inertial droplet clouds is responsible for the enhanced dispersion.