The three-dimensional motion of all particles in a rotating mixer with
two baffles was calculated using the discrete particle simulation. Th
is simulation dealt with the mixing of single-component spherical part
icles which fill the mixer half-way. The effect of the baffles on the
particles' motion and on particle mixing was studied. It was found tha
t the mixing curve, which shows the relationship between the degree of
mixing and time, agreed well qualitatively with previous experimental
results. The present simulation predicts that there is an optimal baf
fle length/height ratio for particle mixing, and that the deformation
pattern of the particle bed is affected by the baffles. (C) 1997 Elsev
ier Science S.A.