Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2002-12-03
Mol. Phys. 101 (2003) 1713
Physics
Condensed Matter
Statistical Mechanics
Scientific paper
10.1080/0026897031000085164
We report a series of molecular dynamics simulations and investigate the possibility to separate a granular mixture of inelastic hard spheres by vigorously shaking it in a box made of two connected compartments. As its one-component counterpart, the system exhibits a ``left-right'' symmetry breaking entirely due to the inelasticity of grain-grain collisions, and triggered by increasing the number of particles. In the compartment where the density of grains is larger, we observe a partial segregation with a predominance of heavy particles. However, this compartment still has a higher density of light particles than the other one, which is light-rich. The density, granular temperature and anisotropic pressure profiles are monitored. We also discuss how to construct a relevant order parameter for this transition and show that the resulting bifurcation diagram is dominated by large fluctuations.
Barrat Alain
Trizac Emmanuel
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