2009/03/24 by Michiel Hermes, Marjolein Dijkstra · 5 citations
Engineering · Materials Science · Physics and Astronomy · #Astronomy #Classical mechanics #Hard spheres #Jamming #Kinetic energy #Material Dynamics and Properties #Materials science #Particle Dynamics in Fluid Flows #Physics #SPHERES #Sports Dynamics and Biomechanics #Thermodynamics #cond-mat.soft
paper · pdf · doi:10.1209/0295-5075/89/38005
Four pages, three figures
arxiv created 2009/03/24 · openalex publication_date 2010/02/01 · arxiv updated 2016/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study jammed configurations of polydisperse colloidal hard spheres with a well-defined temperature (constant kinetic energy) as a function of compression speed and size polydispersity. To this end, we employ event-driven molecular-dynamics simulations at fixed temperature, using an algorithm that strictly prohibits particle overlaps. We find a strong dependence of the jamming density on the compression rate that cannot be explained by crystallization. Additionally, we find that during the compression, the pressure follows the metastable liquid branch until the system gets kinetically arrested. Our results show that further compression yields jammed configurations that can be regarded as the infinite-pressure limit of glassy states and that different glasses can jam at different jamming densities depending on the compression rate. We present accurate data for the jamming density as a function of compression rate and size polydispersity.