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dc.contributor.authorKumar, Vinay
dc.contributor.authorCasel, Mario
dc.contributor.authorDau, Van
dc.contributor.authorWoodfield, Peter
dc.date.accessioned2021-05-13T03:02:49Z
dc.date.available2021-05-13T03:02:49Z
dc.date.issued2021
dc.identifier.issn1290-0729
dc.identifier.doi10.1016/j.ijthermalsci.2021.106976
dc.identifier.urihttp://hdl.handle.net/10072/404316
dc.description.abstractThe effect of the strength of the self-induced magnetic field around a current carrying wire on thermomagnetic convection cooling in ferrofluid is experimentally and numerically investigated. Temperature-rise characteristics of the hot micro-wire for uniform Joule heating with different electric currents are compared to identify the relative importance of the strength of the axisymmetric magnetic field. Experiments are done with copper and platinum wires with current inputs adjusted to achieve the same Joule heating per unit length of wire. It was found that at high current supply (2A), mixing in ferrofluid is escalated due to thermomagnetic convection that resulted into 28% increase in average Nusselt number value which finally resulted into temperature drop of 8 K in comparison to DIW. Comparison of results for different self-induced magnetic field strengths in ferrofluid and deionized water clearly show that the observed cooling phenomenon is due to the self-induced magnetic field interacting with the magnetic fluid rather than natural-convection or other nanofluid-related mechanisms. For 1.83 W J heating, the temperature of the copper wire is 6 K lower than that of the platinum wire. Temperature and velocity contours obtained from simulations based on a 2-D single-phase model including a temperature-dependent magnetic body force provide flow visualization and further confirmed that the thermomagnetic cooling is responsible for the observed behaviour.
dc.description.peerreviewedYes
dc.languageen
dc.publisherElsevier BV
dc.relation.ispartofpagefrom106976
dc.relation.ispartofjournalInternational Journal of Thermal Sciences
dc.relation.ispartofvolume167
dc.subject.fieldofresearchApplied mathematics
dc.subject.fieldofresearchMechanical engineering
dc.subject.fieldofresearchOther engineering
dc.subject.fieldofresearchFluid mechanics and thermal engineering
dc.subject.fieldofresearchcode4901
dc.subject.fieldofresearchcode4017
dc.subject.fieldofresearchcode4099
dc.subject.fieldofresearchcode4012
dc.titleEffect of axisymmetric magnetic field strength on heat transfer from a current-carrying micro-wire in ferrofluid
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationKumar, V; Casel, M; Dau, V; Woodfield, P, Effect of axisymmetric magnetic field strength on heat transfer from a current-carrying micro-wire in ferrofluid, International Journal of Thermal Sciences, 2021, 167, pp. 106976
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2021-05-11T16:07:44Z
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2021 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorDau, Van
gro.griffith.authorWoodfield, Peter L.


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