Aerosol generation by raindrop impact on soil
Aerosol generation by raindrop impact on soil
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DOI：
10.1038/ncomms7083
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发表时间：
2015-01-01
影响因子：
16.6
通讯作者：
Buie, Cullen R.
中科院分区：
文献类型：
--
作者：
Joung, Young Soo;Buie, Cullen R.
研究气溶胶是因为它们对环境和人类健康有重大影响。迄今为止，海风吹来的沙尘和海盐被认为是环境气溶胶扩散的主要机制。在这里，我们研究了雾滴撞击可湿多孔表面产生的气溶胶，包括各种类型的土壤。我们证明，当液滴影响多孔表面时，它们可以释放气溶胶，这些气溶胶可以将多孔介质的元素输送到环境中。在包括土壤和工程材料在内的各种多孔介质上进行的实验表明，了解表面性质和冲击条件可以用来预测何时会发生疯狂的气溶胶生成。这项研究强调了与多孔介质上的液滴相关的新现象，这可能对环境中气溶胶产生的研究产生影响。
Aerosols are investigated because of their significant impact on the environment and human health. To date, windblown dust and sea salt from sea spray through bursting bubbles have been considered the chief mechanisms of environmental aerosol dispersion. Here we investigate aerosol generation from droplets hitting wettable porous surfaces including various classifications of soil. We demonstrate that droplets can release aerosols when they influence porous surfaces, and these aerosols can deliver elements of the porous medium to the environment. Experiments on various porous media including soil and engineering materials reveal that knowledge of the surface properties and impact conditions can be used to predict when frenzied aerosol generation will occur. This study highlights new phenomena associated with droplets on porous media that could have implications for the investigation of aerosol generation in the environment.