Field-Induced Self-Assembled Ferrofluid Aggregation in Pulsatile Flow

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dc.contributorVirginia Techen
dc.contributor.authorGanguly, Ranjanen
dc.contributor.authorZellmer, B.en
dc.contributor.authorPuri, Ishwar K.en
dc.contributor.departmentBiomedical Engineering and Mechanicsen
dc.date.accessed2014-04-04en
dc.date.accessioned2014-04-24T18:34:12Zen
dc.date.available2014-04-24T18:34:12Zen
dc.date.issued2005-09-01en
dc.description.abstractFerrofluid aggregation and dispersion occurs at several length scales in pulsatile flow applications, e. g., in ferrofluidic pumps, valves, and biomedical applications such as magnetic drug targeting. Because of a yet limited understanding, ferrohydrodynamic investigations involving laboratory-scale studies in idealized geometries are of considerable use. We have injected a ferrofluid into a pulsatile host flow and produced field-induced dissolution (aggregation) using external magnets. A comparison is made with ferrofluid aggregation in a steady flow. Subsequently, the accumulation and dispersion of the ferrofluid aggregates in pulsatile flow are characterized by analyzing their size, mean position, and the flow frequency spectrum. The maximum aggregate size A(max), time to form it t(max), and the aggregate half-life t(half) are found to scale according to the relations A(max) proportional to Re-0.71, t(max) proportional to Re-2.1, and t(half) proportional to Re-2.2. While the experiments are conducted at a macroscopic length scale for useful experimental resolution, the results also enable an understanding of the micro- and mesoscale field-assisted self-assembly of magnetic nanoparticles. (c) 2005 American Institute of Physics.en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGanguly, R; Zellmer, B; Puri, IK, "field-induced self-assembled ferrofluid aggregation in pulsatile flow," Phys. Fluids 17, 097104 (2005); http://dx.doi.org/10.1063/1.2040307en
dc.identifier.doihttps://doi.org/10.1063/1.2040307en
dc.identifier.issn1070-6631en
dc.identifier.urihttp://hdl.handle.net/10919/47624en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/pof2/17/9/10.1063/1.2040307en
dc.language.isoen_USen
dc.publisherAIP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectMagnetic fluidsen
dc.subjectPattern formationen
dc.subjectDrugsen
dc.titleField-Induced Self-Assembled Ferrofluid Aggregation in Pulsatile Flowen
dc.title.serialPhysics of Fluidsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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