Density waves and $1/f$ density fluctuations in granular flow
Condensed Matter
2009-10-22 v1 comp-gas
Cellular Automata and Lattice Gases
Abstract
We simulate the granular flow in a narrow pipe with a lattice-gas automaton model. We find that the density in the system is characterized by two features. One is that spontaneous density waves propagate through the system with well-defined shapes and velocities. The other is that density waves are so distributed to make the power spectra of density fluctuations as noise. Three important parameters make these features observable and they are energy dissipation, average density and the rougness of the pipe walls.
Cite
@article{arxiv.cond-mat/9408080,
title = {Density waves and $1/f$ density fluctuations in granular flow},
author = {Gongwen Peng and Hans J. Herrmann},
journal= {arXiv preprint arXiv:cond-mat/9408080},
year = {2009}
}
Comments
Latex (with ps files appended)