Drying Out Microbe-Filled Droplets

Ocean sprays, coughs, and sneezes are just a few of the ways that droplets full of bacteria and salt can get aloft on a breeze. How do these bacteria stay viable even as their droplet evaporates? That’s the question behind this video’s research.

When a bacteria-laden droplet or a salt-laden droplet dries, the evaporating droplet’s contact area shrinks, leaving behind only a concentrated lump of bacteria or salt. But when droplets contain both salt and bacteria, the drying droplet’s contact line gets pinned, leaving a larger area stain. The bacteria’s presence seems to promote crystallization of the salt, which–in turn–traps water in isolated spaces, perhaps helping the bacteria stay viable longer. (Video and image credit: R. Ran et al.)

Bubble bursting changes dramatically when bubbles have neighbors. In dense rafts, collapsing cavities produce thinner, faster jets and droplets up to 5× smaller than isolated bubbles.

A collective effect that could reshape how we model sea spray aerosols.

🔗 https://doi.org/10.1103/7ygz-2s6s

#FluidDynamics #BubbleBursting #Aerosols #Capillarity #Physics

How do suspended particles affect the tiny jets formed by bursting bubbles?

This study shows that nanoparticle- and microparticle-laden liquids behave very differently, revealing complex couplings between viscosity, surface tension, and interfacial stresses.

🔗 https://doi.org/10.1063/5.0315998

#FluidMechanics #BubbleDynamics #InterfacialFlows #Capillarity #aerosols

#FYI #PaulBeckwith video lecture & literature review

#science, condensed! *.* Paul browsing thorugh his open tabs

#AMOC #GulfStream #ESOTC #aerosols #ElNino #CraigVenter #algae #renewables #coffee #fertility #spacevaste #AI #microplastics

Links to papers on YT

https://www.youtube.com/watch?v=1C-9dZ0nyOs

#climate #ClimateScience #climatechange #ClimateEmergency #ClimateCrisis #ClimateBreakdown #ClimateDisruption #globalWarming #globalHeating #ExtremeWeather #polycrisis

Curiosity's “bobble” had a silver lining 🌍: a tiny rock slipped from its scoop door and drifted in Mars’s thin air before it fell back.
🔍 Key insight: the event gave scientists a live demo of Martian dust/aerosol dynamics *and* how the rover’s instruments respond to unexpected motions.

- Unexpected test of Mars’ atmosphere
- Real‑time data on dust lofting
- Lessons for future rover designs

#Mars #Curiosity #Aerosols #SpaceTech #DecentralizedScience

🔗 https://news.google.com/rss/articles/CBMib0FVX3lxTE9zb1VrNk51MEh2V2E0VXg3MkMzUU1fbDl4MzhRMmZKNHlyb01jSjlRSHlNRlBXVTV2Y00tT056cmtzNmcyd1o1M3RvQ3ppalFjZnJSUTE3SUVXU2VEcnNkRUlXTGZONEwycXpzRFd6MA?oc=5