Aggregation kinetics of carbonyl iron based magnetic suspensions in 2D

Identificadores
URI: https://hdl.handle.net/10481/111381
ISSN: 1744-683X
ISSN: 1744-6848
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Auteur
Shahrivar, Keshvad; Carreón González, Elizabeth; Morillas Medina, José Rafael; Vicente Álvarez-Manzaneda, Juan De
Editorial
Royal Society of Chemistry
Date
2017
Referencia bibliográfica
Shahrivar K, Carreón-González E, Morillas JR, de Vicente J. (2017). Aggregation kinetics of carbonyl iron based magnetic suspensions in 2D. Soft Matter; 13 (14): 2677-2685. doi: 10.1039/c7sm00075h
Patrocinador
MINECO and FEDER (MAT 2016-78778-R, MAT 2013-44429-R, PCIN-2015-051); H2020; Junta de Andalucía (P11-FQM-7074); CONACYT (Ref #232347); Ministerio de Educación (FPU14/01576)
Résumé
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 (pl1 f2D2.5) as a function of only two dimensionless numbers: the lambda ratio (l) and the particle surface fraction (f2D).
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