78 citations · 123 across the 4 of their papers we have counts for
4 papers
Geometry-controlled phase transition in vibrated granular media
René Zuñiga, Germán Varas, Stéphane Job
We report experiments on the dynamics of vibrated particles constrained in a two-dimensional vertical container, motivated by the following question: how to get the most out of a g…
Friction weakening by mechanical vibrations: a velocity-controlled process
V. Vidal, C. Oliver, H. Lastakowski +2
Frictional weakening by vibrations was first invoked in the 70's to explain unusual fault slips and earthquakes, low viscosity during the collapse of impact craters or the extraord…
Dynamics of crater formations in immersed granular materials
Germán Varas, Valérie Vidal, Jean-Christophe Géminard
We report the formation of a crater at the free surface of an immersed granular bed,locally crossed by an ascending gas flow. In two dimensions, the crater consists of two piles wh…
Collective behavior in a granular jet: Emergence of a liquid with zero surface-tension
Xiang Cheng, German Varas, Daniel Citron +2
We perform the analog to the "water bell" experiment using non-cohesive granular material. When a jet of granular material, many particles wide, rebounds from a fixed cylindrical t…