
A novel method to measure viscosity has been developed by ESR05 using drop impact on a spherical target, as shown in the sketch above. It relies on high-speed imaging and analysis of the fluid mechanics using a theory developed specifically for this problem. A water drop impact example is shown in the video below. The method is currently being upgraded to study nanosuspensions and nanoemulsions.
Open access to the publication is here:
DOI: https://doi.org/10.1017/jfm.2024.684
Abbot et al., Spreading of a viscous drop after impact onto a spherical target. Journal of Fluid Mechanics. 2024;996:A10.