Abstract
Acoustic vibrations generated by a loud-speaker system have been applied to fluidise binary mixtures of ballotini powders with dissimilar sizes. New phase coexistence effects have been observed akin to solution and de-mixing behaviour in binary liquid mixtures. It is postulated that the size-segregated phase above a mixed phase, which occurs when a steady-state is reached, is due to the pressure gradient. Unlike a molecular system, although the granular “temperature” may achieve uniformity, the column has a higher granular “pressure” at the bottom due to its own weight. An improved experimental method is reported together with further results for similar systems with variable starting conditions.
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© 2000 Springer Science+Business Media Dordrecht
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Marland, A.P., Woodcock, L.V. (2000). Size-Segregation and Mixing Phenomena in Powders Fluidised by Acoustic Vibrations. In: Rosato, A.D., Blackmore, D.L. (eds) IUTAM Symposium on Segregation in Granular Flows. Solid Mechanics and Its Applications, vol 81. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9498-1_10
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DOI: https://doi.org/10.1007/978-94-015-9498-1_10
Publisher Name: Springer, Dordrecht
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