Physicists Explain Droplet Behavior on Hydrophobic Surfaces
New experiments and calculations could improve aerosol and microfluidic technologies while shedding more light on airborne disease transmission.
Researchers investigated what happens when a microscopic drop of water lands on a water-repelling surface, a phenomenon important for everyday situations such as pesticide spraying and disease-causing aerosol spread.
"If the droplet moves too slowly, it sticks," explains Jamie McLauchlan, a PhD student at the University of Bath, UK. "Too fast, and it sticks again.
According to the new research, led by McLauchlan, Adam Squires, and Anton Souslov, the behavior of fast-moving droplets on hydrophobic surfaces is more complex than expected, depending on the droplet's speed in a non-intuitive way.
- Slower-moving droplets stick to the surface
- Faster-moving droplets also stick, rather than bouncing off
Author's summary: New research sheds light on droplet behavior.
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