AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Superaggregate Structure in Diffusion Limited Cluster-Cluster Aggregation (DLCA)
WILLIAM HEINSON, Chris Sorensen, Amit Chakrabarti, Kansas State University
Abstract Number: 345 Working Group: Aerosol Physics
Abstract We explore, through Diffusion Limited Cluster-Cluster Aggregation (DLCA) simulations, the structure of superaggregates created in the continuum regime. A superaggregate is a cluster made up of smaller clusters and exhibits different structural properties than its constituent clusters. DLCA superaggregates are made up of many clusters of fractal dimension 1.8 but the superaggregate as a whole has fractal dimension 2.5. We examine how the scaling prefactor k0 develops as clusters crossover from fractal dimension 1.8 to fractal dimension 2.5. We find that as the initial volume fraction decreases the crossover occurs at smaller cluster sizes in a predictable fashion. Moreover by rescaling the super-aggregate size and mass by the average constituent cluster’s values, a universal scaling prefactor k0 becomes evident.