  We report a numerical study of the diffusiophoresis of short polymers using
non-equilibrium molecular dynamics simulations. More precisely, we consider
polymer chains in a fluid containing a solute which has a concentration
gradient, and examine the variation of the induced diffusiophoretic velocity of
the polymer chains as the interaction between the monomer and the solute is
varied. We find that there is a non-monotonic relation between the
diffusiophoretic mobility and the strength of the monomer-solute interaction.
In addition we find a weak dependence of the mobility on the length of the
polymer chain, which shows clear difference from the diffusiophoresis of a
solid particle. Interestingly, the hydrodynamic flow through the polymer is
much less screened than for pressure driven flows.
