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Issue 14, 2017
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Aggregation kinetics of carbonyl iron based magnetic suspensions in 2D

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Abstract

We investigate the (irreversible) two-dimensional aggregation kinetics of dilute non-Brownian magnetic suspensions in rectangular microchannels using video-microscopy, image analysis and particle-level dynamics simulations. Special emphasis is given to carbonyl iron suspensions that are of interest in the formulation of magnetorheological fluids. The results are compared to non-Brownian suspensions of magnetic latexes. We demonstrate that both suspensions follow a deterministic aggregation process. Furthermore, experimental and simulation aggregation curves can be collapsed onto a master curve when using the appropriate scaling time (∝λ−1ϕ2D−2.5) as a function of only two dimensionless numbers: the lambda ratio (λ) and the particle surface fraction (ϕ2D).

Graphical abstract: Aggregation kinetics of carbonyl iron based magnetic suspensions in 2D

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Article information


Submitted
12 Jan 2017
Accepted
14 Mar 2017
First published
14 Mar 2017

Soft Matter, 2017,13, 2677-2685
Article type
Paper

Aggregation kinetics of carbonyl iron based magnetic suspensions in 2D

K. Shahrivar, E. Carreón-González, J. R. Morillas and J. de Vicente, Soft Matter, 2017, 13, 2677
DOI: 10.1039/C7SM00075H

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