Abstract
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/microsized 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/microsized 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 bulk particulates such as microbes related to bubble bursting.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5626-5634 |
| Number of pages | 9 |
| Journal | Nano letters |
| Volume | 22 |
| Issue number | 13 |
| Early online date | Jun 4 2022 |
| DOIs | |
| State | Published - Jul 13 2022 |
Keywords
- Nano/microsized particle
- bubble bursting
- disease transmission
- enrichment
- jet drop
ASJC Scopus subject areas
- Bioengineering
- General Chemistry
- General Materials Science
- Condensed Matter Physics
- Mechanical Engineering