  We present the results from dissipative particle dynamics (DPD) simulations
of phase separation dynamics in ternary (ABC) fluids mixture in $d=3$ where
components A and B represent the simple fluids and component C represents a
polymeric fluid. Here, we study the role of polymeric fluid (C) on domain
morphology by varying composition ratio, polymer chain length, and polymer
stiffness. We observe that the system under consideration lies in the same
dynamical universality class as a simple ternary fluids mixture. However, the
scaling functions depend upon the parameters mentioned above as they change the
time scale of the evolution morphologies. In all cases, the characteristic
domain size follows: $l(t) \sim t^{\phi} $ with dynamic growth exponent $\phi$,
showing a crossover from the viscous hydrodynamic regime $(\phi=1)$ to the
inertial hydrodynamic regime $(\phi=2/3)$ in the system at late times.
