Abstract
Brownian motion in concentrated suspensions of solid spherical particles was modeled by a computer experiment. The mean collision number and the self-diffusion coefficient of particles were obtained. The collision number per time unit was calculated to be immeasurable because of the fractal character of the Brownian trajectories. It was shown that spheres at volume fraction about 13% formed a percolation cluster. The dependence of the self-diffusion coefficient on volume fraction of particles and measuring time was investigated.
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