Diffusion and Velocity Correlations of the Phase Transitions in a System of Macroscopic Rolling Spheres.

ABSTRACT: We study an air-fluidized granular monolayer composed of plastic spheres which roll on a metallic grid. The air current is adjusted so that the spheres never lose contact with the grid and so that the dynamics may be regarded as pseudo two dimensional (or two dimensional, if the effects of the sphere rolling are not taken into account). We find two surprising continuous transitions, both of them displaying two coexisting phases. Moreover, in all the cases, we found the coexisting phases display a strong energy non-equipartition. In the first transition, at a weak fluidization, a glass phase coexists with a disordered fluid-like phase. In the second transition, a hexagonal crystal coexists with the fluid phase. We analyze, for these two-phase systems, the specific diffusive properties of ea

SUBMITTER: Vega Reyes F 

PROVIDER: S-EPMC9689610 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature