Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-01-06
Physics
Condensed Matter
Soft Condensed Matter
10 pages, 5 figures
Scientific paper
Recent experimental and computational studies of vibrated thin layers of identical spheres have shown transitions to ordered phases similar to those seen in equilibrium systems. Motivated by these results, we carry out simulations of hard inelastic spheres forced by homogenous white noise. We find a transition to an ordered state of the same symmetry as that seen in the experiments, but the clear phase separation observed in the vibrated system is absent. Simulations of purely elastic spheres also show no evidence for phase separation. We show that the energy injection in the vibrated system is dramatically different in the different phases, and suggest that this creates an effective surface tension not present in the equilibrium or randomly forced systems. We do find, however, that inelasticity suppresses the onset of the ordered phase with random forcing, as is observed in the vibrating system, and that the amount of the suppression is proportional to the degree of inelasticity. The suppression depends on the details of the energy injection mechanism, but is completely eliminated when inelastic collisions are replaced by uniform system-wide energy dissipation.
Lobkovsky Alexander E.
Reyes Francisco Vega
Urbach Jeffrey S.
No associations
LandOfFree
The effects of forcing and dissipation on phase transitions in thin granular layers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The effects of forcing and dissipation on phase transitions in thin granular layers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effects of forcing and dissipation on phase transitions in thin granular layers will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-164213