  We investigate the sedimentation dynamics of a binary mixture, the species of
which differ by their Stokes coefficients but are identical otherwise. We
analyze the sedimentation dynamics and the morphology of the final deposits
using Brownian dynamics simulations for mixtures with a range of sedimentation
velocities of both species. In addition, we use the lattice Boltzmann method to
study hydrodynamic effects. We found a threshold in the difference of the
sedimentation velocities above which the species in the final deposit are
segregated. The degree of segregation increases with the difference in the
Stokes coefficients or the sedimentation velocities above the threshold. We
propose a simple analytical model that captures the main features of the
simulated deposits.
