Pattern formation and shocks in granular gases

Details Pattern formation and shocks in granular gases Pattern formation and shocks in granular gases

2004-08-11

arxiv.org/abs/cond-mat/0408252v1

Physics

Condensed Matter

Soft Condensed Matter

34 pages, 18 figures, from the Proceedings of The International School of Physics Enrico Fermi Course CLV, "The Physics of Com

Scientific paper

Granular media such as sand and sugar are ubiquitous in nature and industry but are less well understood than fluids or solids. We consider the behavior of rapid granular flows where the transfer of momenta by collisions dominates. The physics is quite different for the opposite limit of static or slowly moving grains (e.g., sand piles). To gain understanding of granular flows we consider two problems that have been investigated with experiments, particle simulations and hydrodynamic theory: vertically oscillating granular layers and flow past an obstacle. Oscillating granular layers spontaneously form spatial patterns when the container acceleration amplitude exceeds a critical value, about 2.5 times the gravitational acceleration. Simulations with hard spheres that conserve linear momentum and dissipate energy in collisions are in qualitative accord with some but not all aspects of the observed patterns. It is necessary to include friction and angular momentum conservation in the simulations to achieve quantitative accord with observations. [Abridged]

Affiliated with

Also associated with

No associations

Rating

Pattern formation and shocks in granular gases 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 Pattern formation and shocks in granular gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pattern formation and shocks in granular gases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-208195