RADIAL AND AXIAL SEGREGATION OF GRANULAR MIXTURES IN THE ROTATING-DRUM GEOMETRY
Sanjay Puri and
Hisao Hayakawa Additional contact information Sanjay Puri: School of Physical Sciences, Jawaharlal Nehru University, New Delhi – 110067, India
Hisao Hayakawa: Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-01, Japan
We formulate a phenomenological model for the dynamical evolution of granular mixtures in a rotating drum. In particular, we present a dynamical basis for an "effective surface tension," which penalizes sharp interfaces between regions enriched in different components of the mixture. We also present representative results which demonstrate that our model captures many experimental features for this problem.