Volume 68, Number 4, November 2004
|Page(s)||508 - 514|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||27 October 2004|
Excluded-volume attraction in vibrated granular mixtures
Department of Chemical Engineering, Indian Institute of Science - Bangalore, India
Accepted: 30 September 2004
Segregation of larger particles due to excluded-volume attraction is studied using experiments and simulations in a bidisperse vibrated granular material. There is an attractive force when the distance between the large particles is less than the small-particle diameter, because smaller particles are excluded from the gap between the larger particles, and there is no pressure in the gap to resist the pressure exerted by the collision of the smaller particles on the outer surfaces of the larger particles. Analytical results are derived for the excluded-volume attraction, and these are in agreement with the experimental and simulation results.
PACS: 45.70.-n – Granular systems / 64.75.+g – Solubility, segregation, and mixing; phase separation / 81.05.Rm – Porous materials; granular materials
© EDP Sciences, 2004
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