title: Self-focusing dynamics in monopolarly charged suspensions.
abstract: The Smoluchowski equation for irreversible aggregation in suspensions of equally charged particles is studied. Accumulation of charges during the aggregation process leads to a crossover from power-law to sublogarithmic cluster growth at a characteristic time and cluster size. For larger times the suspension is usually called stable, although aggregation still proceeds slowly. In this regime the size distribution evolves towards a universal scaling form, independent of any parameter included in the theory. The relative width falls off to a universal value sigma(infinity)(r) approximately 0.2017 that is much smaller than in the uncharged case. We conjecture that sigma(infinity)(r) is a lower bound for the asymptotic relative width for all physical systems with irreversible aggregation.
authors.affiliation: Institut für Physik, Universität Duisburg-Essen, 47048 Duisburg, Germany.
authors.forename: Stephan M
authors.initials: SM
authors.lastname: Dammer
authors.forename: Dietrich E
authors.initials: DE
authors.lastname: Wolf