Issue 14, 2017
From the journal:

Soft Matter

Aggregation kinetics of carbonyl iron based magnetic suspensions in 2D

Keshvad Shahrivar,a   Elizabeth Carreón-González,a   Jose R. Morillasa  and  Juan de Vicente*a  

* Corresponding authors

a Department of Applied Physics, Faculty of Sciences, University of Granada, C/Fuentenueva s/n, 18071-Granada, Spain
E-mail: jvicente@ugr.es

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

DOI
https://doi.org/10.1039/C7SM00075H
Article type
Paper
Submitted
12 Jan 2017
Accepted
14 Mar 2017
First published
14 Mar 2017

Soft Matter, 2017,13, 2677-2685

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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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