Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 3: Granular Matter

DY 3.3: Vortrag

Montag, 7. März 2016, 10:15–10:30, H46

Self-organization of wet granular hexagons under vertical agitations — •Manuel Baur and Kai Huang — Experimentalphysik V, Universität Bayreuth, 95440 Bayreuth, Germany

As each sand grain in nature has a peculiar shape, it is of practical importance to understand how shape matters in the collective beahvior of granular materials. As a starting point, we focus on the assembly of hexagonally shaped disks confined in a monolayer and agitated vertically against gravity. The particles are partially wet so as to introduce short ranged attractive interactions at each contact. We explore how the agitation strength and frequency, area fraction as well as cohesion influence the melting of wet granular hexagons by means of particle tracking. Using bond orientational order parameters, we identify the local structures of the particle, determine the nonequilibrium stationary states of the system and present them in a stability diagram. Moreover, we analyze the translational as well as orientational diffusivity of the particles in the vicinity of the melting transition.