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Updated: Jan 26, 2026

Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids
Published on: March 5, 2014
Ejecta, Corolla, and Splashes from Drop Impacts on Viscous Fluids
Florence Marcotte1, Guy-Jean Michon1, Thomas Séon1
1Sorbonne Université, CNRS, Institut Jean Le Rond d'Alembert, F-75005 Paris, France.
Abstract:
We investigate the impact of liquid drops on deep pools of aqueous glycerol solutions with variable pool viscosity and air pressure both experimentally and numerically. With this approach, we are able to address drop impacts on substrates that continuously transition from low-viscosity liquids to almost solids. We show that the generic corolla spreading out from the impact point consists of two distinct sheets, namely an ejecta sheet fed by the drop liquid and a second sheet fed by the substrate liquid, which evolve on separated timescales. These two sheets contribute to a varying extent to the corolla overall dynamics and splashing, depending on the viscosity ratio between the two liquids.
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