Jamming patterns of granular flow through a constriction

Authors

Anthony G. Longjas National Institute of Physics, University of the Philippines Diliman
Marisciel L. Palima National Institute of Physics, University of the Philippines Diliman
Caesar A. Saloma National Institute of Physics, University of the Philippines Diliman

Abstract

We present a mechanism to control jamming of the flow of hard spheres through a constriction. Jamming patterns of steel balls with uniform (all-large) and mixed (large and small) configurations were studied in a 2D hopper. In the uniform case, the percentage of jamming events versus the count of the hard spheres N showed a three-phase regime characterized by an initial no-jamming phase, a jamming phase with a quadratic increase, and a purely jamming phase. In the mixed case, the percentage of jamming events versus the number ratio R of small to large spheres showed a two-phase regime with a linear increase for low R and a logarithmic decrease for high R. Hence, a control of the jamming condition is achieved by simply changing R. All the experimental results were regenerated using simple-rules and agent-based cellular automata (CA) model, which suggests that the jamming patterns observed are dependent on the occurrence of a few dominant jamming configurations.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2004-3D-03

Section

Theoretical and Computational Physics

Published

2004-10-25

How to Cite

[1]

AG Longjas, ML Palima, and CA Saloma, Jamming patterns of granular flow through a constriction, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-3D-03 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-3D-03.