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DY: Fachverband Dynamik und Statistische Physik

DY 4: Granular Matter / Contact Dynamics Part I

DY 4.2: Talk

Monday, March 16, 2015, 09:45–10:00, BH-N 128

Ordering of Granular Rod Monolayers Driven Far from Thermodynamic Equilibrium — Thomas Müller¹, Daniel de las Heras², Ingo Rehberg¹, and •Kai Huang¹ — ¹Experimentalphysik V, Universität Bayreuth, D-95440 Bayreuth, Germany — ²Theoretische Physik II, Universität Bayreuth, D-95440 Bayreuth, Germany

The orientational order of vertically agitated granular rod monolayers is investigated experimentally and compared with equilibrium Monte Carlo simulations and density functional theory. At sufficiently high density, short rods form a tetratic state and long rods form a uniaxial nematic state. The length-to-width ratio at which the order changes from tetratic to uniaxial is around 7.3 in both experiments and simulations. Such a comparison illustrates the universal aspects of the self-organization of rod-shaped particles across thermal and athermal systems.