Dynamics of axial separation in long rotating drums

Abstract

We propose a continuum description for the axial separation of granular materials in a long rotating drum. The model, operating with two local variables, concentration difference and the dynamic angle of repose, describes both initial transient traveling wave dynamics and long-term segregation of the binary mixture. Segregation proceeds through ultra-slow logarithmic coarsening.

4 pages, 3 Postscript figures; submitted to PRL

References in corpus (1)

• Traveling Granular Segregation Patterns in a Long Drum Mixer

Cited by in corpus (12)

• Patterns and Collective Behavior in Granular Media: Theoretical Concepts
• Continuum theory of partially fluidized granular flows
• Simulational studies of axial granular segregation in a rotating cylinder
• Subdiffusive axial transport of granular materials in a long drum mixer
• Diffusion of a granular pulse in a rotating drum
• Gases, liquids and crystals in granular segregation
• Slow axial drift in three-dimensional granular tumbler flow
• The mechanism of long-term coarsening of granular mixtures in rotating drums
• Floquet-Band Engineering of Shaken Bosonic Condensates
• Pattern formation in a fully-3D segregating granular flow
• Origin of granular axial segregation bands in a rotating tumbler: An interface-mixing driven Rayleigh-Taylor instability
• Granular segregation in dense systems: the role of statistical mechanics and entropy