Volume 66, Number 2, April 2004
|Page(s)||277 - 283|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 April 2004|
Impulse distributions in dense granular flows: Signatures of large-scale spatial structures
Martin Fisher School of Physics, Brandeis University Mailstop 057, Waltham, MA 02454-9110, USA
Accepted: 11 February 2004
We study the impulse distribution in a model of gravity-driven granular flow and show that changes in the distribution are correlated with the appearance of clusters of “frequently-colliding” particles. Our simulations show increasingly large linear clusters as the flow velocity decreases. The dissipative nature of the collisions leads to an increase of small-impulse events as the size of these clusters grow and can explain the observed changes in the impulse distribution as the flow rate decreases.
PACS: 81.05.Rm – Porous materials; granular materials / 45.70.-n – Granular systems / 83.10.Pp – Particle dynamics
© EDP Sciences, 2004
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