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Experimental investigation of thermal conductivity of magnetic nanofluids

descriptionPublicationkeyboard_double_arrow_right Conference object , Other literature type 01 Jan 2012Publisher:AIPJournal:AIP Conference Proceedings (issn: 0094-243X,

Authors: Hyo Sook Lee; Kinnari Parekh;

doi: 10.1063/1.4710041

Experimental investigation of thermal conductivity of magnetic nanofluids

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Abstract

Two different magnetic nanofluids comprising of magnetite and Mn-Zn ferrite particles were synthesized in light hydrocarbon oil using continuous chemical process. Powder XRD and TEM image show single phase spinel structure with size of 10 nm and 6.7 nm, respectively for magnetite and Mn-Zn ferrite. Thermal conductivity of nanofluids has been studied as a function of volume fraction under transverse magnetic field. Magnetite nanofluid shows 17% enhancements in thermal conductivity for 4.7% volume fraction while Mn-Zn ferrite shows 45% enhancement at 10% volume fraction. In presence of transverse magnetic field the magnetite nanofluids shows further enhancement from 17% to 30% while no change in thermal conductivity has been observed for Mn-Zn ferrite. These results are explained considering the dipolar coupling co-efficient which for magnetite particles favors chain structures.

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	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
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