Berlin 2015 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 4: Granular Matter / Contact Dynamics Part I
DY 4.2: Vortrag
Montag, 16. März 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.