Researchers from Tokyo Metropolitan University have revealed how liquid foams collapse by observing individual collapse events with high-speed video microscopy. They found that cracks in films led to a receding liquid front that sweeps up the original film border, inverts its shape, and releases a droplet, which hits and breaks other films. Their observations and physical model provide key insights into how to make foams more or less resistant to collapse.
source https://phys.org/news/2021-03-foams-collapse-dont.html
