Gyroscopic instability of a drop trapped inside an inclined circular hydraulic jump.
A drop of moderate size deposited inside a circular hydraulic jump remains trapped at the shock front and does not coalesce with the liquid flowing across the jump. For a small inclination of the plate on which the liquid is impacting, the drop does not always stay at the lowest position and oscillates around it with a sometimes large amplitude, and a frequency that slightly decreases with flow rate. We suggest that this striking behavior is linked to a gyroscopic instability in which the drop tries to keep constant its angular momentum while sliding along the jump.
Pirat
Christophe
C
Laboratoire de Physique de la Matière Condensée et Nanostructures, UMR 5586 CNRS & Université de Lyon; Université Lyon I, 69622 Villeurbanne, France.
Lebon
Luc
L
Fruleux
Antoine
A
Roche
Jean-Sébastien
JS
Limat
Laurent
L