Cluster growth by diffusion-limited aggregation in shear flow

A two-dimensional square lattice computer model was used to study the cluster growth process by irreversible aggregation on the boundary of a shear flowing colloidal solution. The trajectories of the aggregating particles are determined by both a diffusion component and the streamlines of the flow....

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Bibliographic Details
Published inPhysica A Vol. 247; no. 1; pp. 59 - 66
Main Authors Kovács, T., Bárdos, G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.12.1997
Subjects
Aggregation
DLA
Fractals
Shear flow
Aggregation
05.55
Shear flow
DLA
Fractals
47.10
05.60
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Summary:A two-dimensional square lattice computer model was used to study the cluster growth process by irreversible aggregation on the boundary of a shear flowing colloidal solution. The trajectories of the aggregating particles are determined by both a diffusion component and the streamlines of the flow. The streamlines were obtained by iterative solution of the Navier-Stokes equation. For zero drift (the case of simple DLA), the horizontal growth of the aggregates is symmetric, but even a very weak drift breaks down this symmetry considerably. The fractal dimensions obtained in the cases of zero and nonzero drift seem to be slightly different: 1.67 and 1.78, respectively.
ISSN:0378-4371
1873-2119
DOI:10.1016/S0378-4371(97)00397-X