Abstract
Mixing of two granular phases in a rotary kiln
was investigated through CFD simulations using a two-
dimensional transverse plane base
d on the Eulerian
approach and the kinetic theory of granular flows.
Simulations were performed transverse with the aim to
investigate mixing of two particulate solids, CaCO
3
and
Al
2
O
3
, under the rolling mode. Simulation results indicated
particle segregation rather th
an mixing during the plane
rotation. Volume fractions and velocity contours of each
phase were examined to understand the mixing and
segregation. Particles with lower density and small particle
diameter are collected in the middle section of the bed, while
particles with a higher density and larger particle diameter
get collected at the bottom of the rotating cylinder.
Variations in densities and particle sizes of solid particles
were identified as
the main causes of the particle segregation.
Further studies are required
to examine the effect of degree
of filling on mixing performance and how the use of lifters
may improve the mixing efficiency.
was investigated through CFD simulations using a two-
dimensional transverse plane base
d on the Eulerian
approach and the kinetic theory of granular flows.
Simulations were performed transverse with the aim to
investigate mixing of two particulate solids, CaCO
3
and
Al
2
O
3
, under the rolling mode. Simulation results indicated
particle segregation rather th
an mixing during the plane
rotation. Volume fractions and velocity contours of each
phase were examined to understand the mixing and
segregation. Particles with lower density and small particle
diameter are collected in the middle section of the bed, while
particles with a higher density and larger particle diameter
get collected at the bottom of the rotating cylinder.
Variations in densities and particle sizes of solid particles
were identified as
the main causes of the particle segregation.
Further studies are required
to examine the effect of degree
of filling on mixing performance and how the use of lifters
may improve the mixing efficiency.
