Extreme small-scale clustering of droplets in turbulence driven by hydrodynamic interactions

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Abstract

We perform three-dimensional particle tracking measurements on droplets in a turbulent airflow. The droplets display the well-known preferential concentration of inertial particles, with an additional extreme clustering at the smallest scales. We explain this additional clustering phenomenon theoretically based on a Stokes-flow description of two spheres including their mutual hydrodynamic interaction and a perturbative small-inertia expansion.

Original languageEnglish
Article number244504
Number of pages5
JournalPhysical Review Letters
Volume120
Issue number24
DOIs
Publication statusPublished - 15 Jun 2018

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