dc.contributor.authorWang, Zhaomeng
dc.contributor.authorVarma, V. B.
dc.contributor.authorXia, Huan Ming
dc.contributor.authorWang, Z. P.
dc.contributor.authorRamanujan, Raju Vijayaraghavan
dc.identifier.citationWang, Z., Varma, V. B., Xia, H. M., Wang, Z. P., & Ramanujan, R. V. (2015). Spreading of a ferrofluid core in three-stream micromixer channels. Physics of fluids, 27(5), 052004-.en_US
dc.description.abstractSpreading of a water based ferrofluid core, cladded by a diamagnetic fluid, in three-stream micromixer channels was studied. This spreading, induced by an external magnetic field, is known as magnetofluidic spreading (MFS). MFS is useful for various novel applications where control of fluid-fluid interface is desired, such as micromixers or micro-chemical reactors. However, fundamental aspects of MFS are still unclear, and a model without correction factors is lacking. Hence, in this work, both experimental and numerical analyses were undertaken to study MFS. We show that MFS increased for higher applied magnetic fields, slower flow speed of both fluids, smaller flow rate of ferrofluid relative to cladding, and higher initial magnetic particle concentration. Spreading, mainly due to connective diffusion, was observed mostly near the channel walls. Our multi-physics model, which combines magnetic and fluidic analyses, showed, for the first time, excellent agreement between theory and experiment. These results can be useful for lab-on-a-chip devices.en_US
dc.relation.ispartofseriesPhysics of fluidsen_US
dc.rights© 2015 AIP Publishing LLC. This paper was published in Physics of Fluids and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4919927]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.en_US
dc.titleSpreading of a ferrofluid core in three-stream micromixer channelsen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.description.versionPublished versionen_US
dc.contributor.organizationA*STAR SIMTechen_US

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