Segregation of a granular binary mixture in a rotating drum: A critical phenomenon

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The segregation phenomena of a 1:1 mixture of grain particles with different frictional properties in a rotating drum are studied by simulations. The surface flow is modeled by extending the rules from sandpile models while the rotation is modeled by a solid rotation. Radial segregation will occur only if the rotational transport rate ω is less than some critical value ωc. Our results show that such a segregation can be described by a non-equilibrium critical phase transition in the steady state with the particle transport rate playing the role of the temperature. Employing finite-size scaling analysis similar to standard critical phenomena, critical exponents for the order parameter and its fluctuation are also obtained numerically.

Original languageEnglish
Pages (from-to)659-666
Number of pages8
JournalChinese Journal of Physics
Issue number5
StatePublished - 1998


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