Critical Phenomena in Driven Granular Matter: Jamming and Glassy Behavior - Final Report

Teitel, Stephen

关键词: Granular materials;    jamming;    glassy behavior;   

DOI  :  10.2172/1063285
RP-ID  :  DOE-ER46298-1
PID  :  OSTI ID: 1063285

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

Granular materials, such as powders, seeds, grains, sand, rocks, etc., are ubiquitous both in nature and in industrial processes. At the scale of individual grains, granular systems are particularly simple: particles interact only when they touch. But when viewed in the aggregate, granular systems can display complex behavior. In particular, as the volume packing fraction of the grains increases, the system undergoes a jamming transition from a flowing liquid to a disordered but rigid solid. We study the critical behavior of such systems near the jamming transition using numerical simulations of a simple model of soft-core, bidisperse, frictionless disks in two dimensions. We seek to understand the structural and transport properties of such systems under a variety of physical perturbations such as steady state shear driven flow, and finite thermal fluctuations.