Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 21: Granular Matter/Contact Dynamics

DY 21.7: Vortrag

Mittwoch, 28. März 2012, 16:00–16:15, MA 144

Jamming and glassy dynamics in driven particulate systems — •Claus Heussinger — Institute for theoretical physics, University Göttingen

The jamming paradigm aims at providing a unified view for the elastic and rheological properties of materials as different as foams, emulsions, suspensions or granular media. Apart from the industrial relevance of these materials, there is also a fundamental theoretical interest in the (athermal) jamming transition: as a new paradigm for structural arrest its relation to the (thermal) glass transition, the characterization of common and distinguishing features, remain to be elucidated.

By comparing different computational models we will discuss the question of universality on the macroscopic level of rheological observables as well as on the microscopic level of single particle trajectories and collective particle motion. We will show how small changes in the particle nteractions may lead to large changes in the response of the system. The goal is to delineate genuine aspects of a universal jamming transition from system-specific properties that depend on microscopic details, the driving mechanism or the preparation protocol.