Chaining in Magnetic Colloids in the Presence of Flow

Details Chaining in Magnetic Colloids in the Presence of Flow Chaining in Magnetic Colloids in the Presence of Flow

2000-05-17

arxiv.org/abs/cond-mat/0005282v1

Physics

Condensed Matter

Statistical Mechanics

15 pages, 3 figures

Scientific paper

10.1063/1.1308541

We discuss the effect of an homogeneous flow in the aggregation process of colloidal magnetic particles at moderate concentration. Situations in which the presence of flow acts in favor of the chaining process: particles assemble into chains larger than the ones emerging in the absence of flow, under the only influence of an externnaly imposed field, have been analyzed. The results we obtain follow from the analysis of the pair correlation function which, owing to the potencial character of the flow we consider, can be interpreted in terms of a Boltzmann-like stationary distribution function. To render the influence of the flow on the resulting structures explicit, we study the particular cases of axisymmetric and planar elongational flows.

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