Numerical method of gravity-assisted granular mixing through a pipe

Authors

Marissa Pastor ⋅ PH National Institute of Physics, University of the Philippines Diliman
Johnrob Bantang ⋅ PH National Institute of Physics, University of the Philippines Diliman
Caesar Saloma ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We propose a model for gravity-assisted mixing of granules of the same masses and sizes colliding with a horizontally oscillating obstacle within the pipe. The only variable, which characterizes a granule during the simulation is its normal coefficient of restitution, m_N. The collision between a granule and the obstacle is assumed to be a frictionless binary collision of hard-spheres obeying the conservation of momentum. Regardless of the initial states of the particles, and opening radius of the pipe, the frequency distributions for final positions of particles for m_N = 0.25, 0.5, 0.75, and 1.0 at any location at the pipe end are approximately the same. This result implies that granular mixing is present. At the pipe height equal to 13.3 units a more uniform distribution was obtained. Finally, symmetric final directions of each particle further emphasized the presence of mixing.

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Issue

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

Article ID

SPP-2004-3D-02

Section

Theoretical and Computational Physics

Published

2004-10-25

How to Cite

[1]

M Pastor, J Bantang, and C Saloma, Numerical method of gravity-assisted granular mixing through a pipe, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-3D-02 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-3D-02.