2014/01/01 by Ronny Moebius, Ronny Möbius, Claus Heussinger
Engineering · Materials Science · Physics and Astronomy · #Classical mechanics #Condensed matter physics #Conservative force #Dissipation #Drag #Force Microscopy Techniques and Applications #Granular flow and fluidized beds #Granular material #Material Dynamics and Properties #Mechanics #Particle (ecology) #Phase transition #Physics #Relaxation (psychology) #Thermodynamics #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1039/c4sm00178h
published as Soft Matter 10, 4806 (2014) · accepted at Soft Matter
openalex publication_date 2014/01/01 · arxiv created 2014/04/07 · arxiv updated 2016/10/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use computer simulations to study highly dense systems of granular particles that are driven by oscillating forces. We implement different dissipation mechanisms that are used to extract the injected energy. In particular, the action of a simple local Stokes' drag is compared with non-linear and history-dependent frictional forces that act either between particle pairs or between particles and an external container wall. The Stokes' drag leads to particle motion that is periodic with the driving force, even at high densities around close packing where particles undergo frequent collisions. With the introduction of inter-particle frictional forces this "interacting absorbing state" is destroyed and particles start to diffuse around. By reducing the density of the material we go through another transition to a "non-interacting" absorbing state, where particles independently follow the force-induced oscillations without collisions. In the system with particle-wall frictional interactions this transition has signs of a discontinuous phase transition. It is accompanied by a diverging relaxation time, but not by a vanishing order parameter, which rather jumps to zero at the transition.