Tracer dynamics in a concentrated colloidal system

Tracer dynamics of a concentrated colloidal system is studied using the Dissipative Particle Dynamics (DPD) simulation model. The particle softness is varied and the dynamics is studied near the transition temperature of the fluid. The Tracer-Tracer (TT) softness parameter is fixed for the whole simulation. And the Fluid-Fluid (FF) softness parameter along with the Fluid-Tracer (FT) softness parameter are made to vary. The MSDs of tracers are studied for the different combinations of the FF and the FT softness parameters.