Long-time self-diffusion in concentrated colloidal dispersions
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A theory of self-diffusion in concentrated dispersions is presented, in which the effects of hydrodynamic and direct interactions between macroparticles are virtually decoupled. The long-time self-diffusion coefficient DsL is written in terms of the radial distribution function of the suspended particles and of their short-time self-diffusion coefficient DsS. The predictions for the volume fraction dependence of DsL in hard-sphere suspensions are in excellent agreement with available experimental results. © 1988 The American Physical Society.
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