The Lions of the Piazza del Popolo

Emmanuel Villermaux
Aix-Marseille University, IRPHE
Marseille, France

The Lions of the Piazza del Popolo
Image by E. Villermaux/Aix-Marseille University

Rome, Piazza del Popolo, the lions of the central fountain expectorate a turbulent water sheet. Random velocity fluctuations in the liquid nucleate holes which, driven by surface tension, grow and merge, leaving the sheet as a set of connected ligaments. These corrugated ligament further breakup into a collection of disjointed droplets broadly distributed in size.

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Emmanuel Villermaux
Affiliation: Aix-Marseille University, IRPHE
Location: Marseille