Abstract
A phase separation of fluidized granular matter is presented. Molecular dynamics simulations of a granular system, in two spatial dimensions, with a vibrating wall and without gravity exhibit appearance, coagulation, and evaporation of bubbles. The instability is produced by the existence of a negative compressibility region, that is caused by the energy dissipation at collisions. The phenomenon is analogous to the spinodal decomposition of the gas-liquid transition of the van der Waals model. A hydrodynamic model gives account for the negative compressibility and predicts a critical point that is in qualitative agreement with the results of the simulations. In the onset of phase separation, we have deduced a macroscopic model that agrees quite well with molecular dynamics simulations.
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© 2003 Springer-Verlag Berlin Heidelberg
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Soto, R., Argentina, M., Clerc, M.G. (2003). Van der Waals-Like Transition in Fluidized Granular Matter. In: Pöschel, T., Brilliantov, N. (eds) Granular Gas Dynamics. Lecture Notes in Physics, vol 624. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39843-1_13
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DOI: https://doi.org/10.1007/978-3-540-39843-1_13
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-20110-6
Online ISBN: 978-3-540-39843-1
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