  We present a multiscale hybrid particle-field scheme for the simulation of
relaxation and diffusion behavior of soft condensed matter systems. It combines
particle-based Brownian dynamics and field-based local dynamics in an adaptive
sense such that particles can switch their level of resolution on the fly. The
switching of resolution is controlled by a tuning function which can be chosen
at will according to the geometry of the system. As an application, the hybrid
scheme is used to study the kinetics of interfacial broadening of a polymer
blend, and is validated by comparing the results to the predictions from pure
Brownian dynamics and pure local dynamics calculations.
