Dammer, Stephan M.; Wolf, Dietrich:
Self-focusing dynamics in monopolarly charged suspensions
In: Physical review letters, Jg. 93 (2004), Heft 15, S. 150602 (4 Seiten)
2004Artikel/Aufsatz in ZeitschriftPhysik
Self-focusing dynamics in monopolarly charged suspensions
Dammer, Stephan M.; Wolf, DietrichLSF


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 σr∞≈0.2017 that is much smaller than in the uncharged case. We conjecture that σr∞ is a lower bound for the asymptotic relative width for all physical systems with irreversible aggregation.