Self-similar jet evolution after drop impact on a liquid surface

Cees J.M. Van Rijn, Jerry Westerweel, Bodjie Van Brummen, Arnaud Antkowiak, Daniel Bonn

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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.

Original languageEnglish
Article number034801
Number of pages8
JournalPhysical Review Fluids
Volume6
Issue number3
DOIs
Publication statusPublished - 2021

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