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Abstract
Dissipative particle dynamics (DPD), a tool for simulating the hydrodynamic behaviour of complex fluids, was recently successfully applied to a new application-modelling the adsorption of colloidal particles onto a polymer coated surface. Here, we both improve our model for the simulation of colloid-polymer systems and broaden its application. A virtual wall has been added to the model for colloidal particle adsorption, allowing the density of particles in the wall to be the same as in the solvent. This eliminates the depletion layer and thus also enables the potential between a colloidal particle and the wall to be calculated. We use two alternative wall models, the solid wall and the porous wall, to study the process of polymer adsorption. Simulations are also conducted in order to understand, and hence reduce, the problem of polymer crossing and to study the viscosity of various colloid-polymer systems.
