What is it about?

Liquid droplets spread out when they come into contact with a smooth horizontal surface. We present data for the increase of droplet radii during this process. And we compare with theories based on dimensional analysis and on energy conservation.

Featured Image

Why is it important?

It's commonplace for spreading droplets to remain beaded up, such that their radii approach a final value that is finite; this is called "partial wetting." However, prior works focus almost exclusively on the less usual case of "complete wetting" where droplet radii grows forever without bound. Our work thus fills a crucial gap in the prior understanding.

Perspectives

The first, third, and fourth authors performed experiments at home, in their kitchens, during the COVID-19 pandemic as part of a summer "Research Experience for Undergraduates" program.

Douglas Durian
University of Pennsylvania

Read the Original

This page is a summary of: Spatters and spills: Spreading dynamics for partially wetting droplets, Physics of Fluids, January 2022, American Institute of Physics, DOI: 10.1063/5.0077461.
You can read the full text:

Read

Contributors

The following have contributed to this page