Sediment motion induced by Faraday waves in a Hele-Shaw cell

MARTINO, ROMÁN; BONGIOVANNI, GUSTAVO; BOSCHAN, ALEJANDRO; GÉMINARD, JEAN-CHRISTOPHE; MAGGI, DIEGO BARBA; PIVA, MARCELO

Physical Review E

American Physical Society

Año: 2020 vol. 101

2470-0045

The interaction between the oscillatory boundary-layer flow induced by Faraday waves and a sedimentarygranular layer was studied in a Hele-Shaw cell vertically vibrated. The experimental parameters were thevibration frequency f and acceleration a and the particle diameter dp. At a critical value for the depth of thesupernatant fluid layer hc, a transition between a flat motionless granular layer and a second regime in whichthe granular layer undulates and oscillates periodically was observed. For the smallest value of dp (for which theStokes number was St 1) the reduced acceleration = a/g (g is the acceleration of gravity) is independent ofhc, while for the larger ones, depends linearly on hc. Finally, it is shown that at the onset of grain motion,the wave velocity Vw = hw f /2 (hw is the wave amplitude) depends linearly on hc and is independent of dp.