Abstract
In this study, the mixing and segregation of two
particle phases in a horizontal rotating cylinder were
investigated via simulations and experiments. Two-dimensional
CFD simulations were carried out to simulate the particle
behavior in a transverse plane of a rotating cylinder. The
Eulerian approach with the kinetic theory of granular flow was
used to simulate granular phases with different particle size and
density under the rolling mode. Experiments were done in an
in-house built transparent rotary drum. The experiments
revealed that the fine particles tend to move into the particle bed
and form a kidney during rotation. Particle dynamics in the
active layer initiate the segregation according to the trajectory
mechanism. Further, percolation brings small particles through
the voids of larger particles under gravity and get concentrated
at the midsection of the particle bed in the transverse plane. The
simulated results matched well with the experimental data.
particle phases in a horizontal rotating cylinder were
investigated via simulations and experiments. Two-dimensional
CFD simulations were carried out to simulate the particle
behavior in a transverse plane of a rotating cylinder. The
Eulerian approach with the kinetic theory of granular flow was
used to simulate granular phases with different particle size and
density under the rolling mode. Experiments were done in an
in-house built transparent rotary drum. The experiments
revealed that the fine particles tend to move into the particle bed
and form a kidney during rotation. Particle dynamics in the
active layer initiate the segregation according to the trajectory
mechanism. Further, percolation brings small particles through
the voids of larger particles under gravity and get concentrated
at the midsection of the particle bed in the transverse plane. The
simulated results matched well with the experimental data.
