Gravitational spreading of granular paste droplets induced by mechanical vibrations
Naïma Gaudel1, Sébastien Kiesgen de Richter
1Laboratoire d'Énergétique et de Mécanique Théorique et Appliquée (LEMTA), Université de Lorraine - CNRS, UMR 7563, Vandoeuvre-lès-Nancy 54505, France. naima.gaudel@univ-lorraine.fr sebastien.kiesgen@univ-lorraine.fr.
Abstract:
Spreading experiments of granular paste droplets over a smooth and hydrophilic plate under vertical vibrations were performed. We show that applying vibrations tunes the spreading by changing the apparent viscosity of the paste and makes a Newtonian regime appear where R(t) ∝ t1/8. In this regime, the influence of the intensity of the vibrations, the diameter of the particles and the interstitial viscosity is investigated, and all experiments are rationalized by a lubrication Peclet number, in agreement with previous results from the literature.
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