Cavitation higher than expected at very low speed

https://phys.org/news/2022-01-low-speed-impacts-liquids.html

"They showed that even at speeds as slow as one meter per second, the impact can decrease the local pressure sufficiently to cause cavitation. This comes about because the liquid is slightly compressible, and so the impact creates waves of large pressure that reflect from the surface to form negative pressure regions.

Only objects that contained an edge led to cavitation. The team saw no such effect when they investigated the impact of a 20-millimeter-diameter sphere, for example."

 

These findings are fully consistent with the "classical" theory for pressure transients ("water hammer").

 

This reminds me of a thread I started a few years ago about the cavitation of V-foils:

Foil Cavitation at Lower Speeds Than Expected https://www.boatdesign.net/threads/foil-cavitation-at-lower-speeds-than-expected.53927/

 

Ahead of your time.