论文标题
纳米/微型颗粒的水流转移：气泡爆发滴滴的富集效果
Water-to-air transfer of nano/micro-sized particulates: enrichment effect in bubble bursting jet drops
论文作者
论文摘要
分散在液体中的气泡在许多自然和工业过程中都广泛存在，并且在从地层到上升到爆发的一生中介导传质中起着关键作用。特别是，在气泡破裂期间弹出的喷气液滴，可以高度富集散装水中的纳米/微型颗粒物和生物，从而影响全球气候和公共卫生。但是，这种富集的详细机制仍然晦涩难懂，富集因子很难预测。在这里，我们通过实验研究了气泡爆发喷射液中纳米/微型颗粒的富集，并突出了基本的流体动力机制，结合了气泡清除的影响和对颗粒传输的爆发的影响。随后提出了富集因子的缩放定律，可以很好地描述我们的实验结果和先前的实验结果。我们的研究可能为与气泡破裂有关的微生物的水流转移提供新的见解。
Bubbles dispersed in liquids are widely present in many natural and industrial processes, and play a key role in mediating mass transfer during their lifetime from formation to rising to bursting. In particular, nano/micro-sized particulates and organisms, present in the bulk water can be highly enriched in the jet drops ejected during bubble bursting, impacting global climate and public health. However, the detailed mechanism of this enrichment remains obscure, with the enrichment factor being difficult to predict. Here, we experimentally investigate the enrichment of nano/micro-sized particles in bubble bursting jet drops and highlight the underlying hydrodynamic mechanism, combining the effects of bubble scavenge and bursting on the transport of particles. Scaling laws for the enrichment factor are subsequently proposed that describe both our and prior experimental results reasonably well. Our study may provide new insights for water-to-air transfer of microbes related to bubble bursting.
