Abstract
Small conical-shaped jets may emanate from a liquid bath a short while after a small drop has hit a liquid pool. Here we perform Particle Image Velocimetry (PIV) measurements of the liquid flow inside upward jets after drop impact and show that fluid elements inside the jets may decelerate up to 5–20 times the gravitational acceleration. The measurements show that both the shape of the jet and the velocity profile are self-similar. A theoretical model including surface tension, fluid inertia and gravity correctly predicts the self-similar velocity profile and shape of the jet, allowing us to provide the first quantitative explanation of the shape and dynamics of the emanating jets.
- Received 19 June 2020
- Accepted 22 December 2020
DOI:https://doi.org/10.1103/PhysRevFluids.6.034801
©2021 American Physical Society
Physics Subject Headings (PhySH)
Video
Liquid Jet Decelerates Faster than Expected
Published 5 March 2021
Video recordings show that the small mountain of liquid that appears after a drop hits a liquid surface has some surprising properties.
See more in Physics