A novel coarsening mechanism of droplet spinodal decomposition.

Here we study the late-stage coarsening dynamics of droplet phase separation in the unstable region of an offsymmetric binary fluid mixtures by using numerical simulations. We show that even when there are no thermal noises, the coarsening process of droplet spinodal decomposition is significantly faster in a fluid mixture than in a solid mixture. We reveal that this is due to spontaneous motion of droplets, which is induced by a non-trivial dynamic coupling between concentration field and hydrodynamic flow. Possible implications of this mechanism are also discussed. [ABSTRACT FROM AUTHOR]