Dissipative Particle Dynamics for Interacting Multicomponent Systems

. We formulate the dissipative particle dynamics technique for multicomponent interacting systems and show that the important property of detailed balance is satisfied. There is currently growing interest in the development of "mesoscale" modelling and simulation methods for describing the complex dynamical behaviour of many kinds of soft condensed matter, whose properties have defied conventional approaches. One example of the challenge faced is provided by complex fluids, which include fluids with many coexisting length and time scales, and those for which a hydrodynamic description is unknown or does not exist at all: examples are ubiquitous and occur in multiphase flows, flow in porous media, colloidal suspensions, microemulsions and polymeric fluids. The traditional continuum-based approach to modelling the behaviour of such fluids, which is centred on the formulation and solution of partial differential equations, has met with only limited success; as a result, new methods are no..