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Colloidal Aggregation with a Drift: A computer simulation

Published online by Cambridge University Press:  10 February 2011

Agustín E. González and
François Leyvraz
Agustín E. González
Affiliation:
Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20–364, 01000 México, D.F., Mexico
François Leyvraz
Affiliation:
Instituto de Física, Laboratorio de Cuernavaca, Universidad Nacional Autónoma de México, Apartado Postal 139-B, 62191 Cuernavaca, Morelos, Mexico
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Abstract

Preliminary results of an aggregation model that takes into account both the Brownian motion as well as the gravitational drift experienced by the colloidal particles and clusters is presented. It is shown that for high strengths of the drift the system crosses over to a regime different from diffusion-limited colloid aggregation, for which there is an increase of the fractal dimension, a speeding up of the aggregation rate and a widening of the cluster size distribution, becoming algebraically decaying with an exponent τ.

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References

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