Paul, G and Philip, J and Raj, B and Das, P K and Manna, Indranil (2012) Thermal conductivity and rheological behaviour of Al-alloy dispersed ethylene glycol based nanofluids. Journal of ASTM International, 9 (5). Paper ID-JAI104435. ISSN 1546-962X

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Abstract

Al-alloy (Al-5 wt. Zn and Al-5 wt. Si) nanoparticle dispersed (0.01-2.00 vol. ) ethylene glycol based nanofluids are prepared by a two-step process. Prior to dispersing in ethylene glycol by magnetic stirring and ultrasonication the Al-alloy nanoparticles synthesized by mechanical alloying are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area diffraction (SAD), and energy dispersive spectroscopy (EDS) to analyze the identity, size, shape, and purity of the powder. A maximum thermal conductivity enhancement of 16 for Al-5 wt. Zn and 13 for Al-5 wt. Si dispersed nanofluids are observed at 0.1 vol. of nanoparticle concentrations. Rheological studies of nanofluids show interesting findings as the viscosity of both types of nanofluids are observed to exhibit values lower than that of base fluid at lower concentrations and higher at higher concentrations. Maximum enhancement of viscosity up to 180 for Al-5 wt. Si and 120 for Al-5 wt. Zn dispersed nanofluids are observed at 2.0 vol. concentration. Copyright © 2012 by ASTM International.

Item Type:	Article
Uncontrolled Keywords:	Al-alloy; Magnetic stirring; Nanofluids; Nanoparticle concentrations; Rheological behaviour; Rheological studies; Selected area diffraction; Thermal conductivity enhancement; Transmission electron microscopy tem; Two-step process; Ultra-sonication, Alloys; Aluminum; Energy dispersive spectroscopy; Ethylene glycol; Mechanical alloying; Nanofluidics; Nanomagnetics; Nanoparticles; Rheology; Silicon; Synthesis (chemical); Thermal conductivity; Thermal conductivity of solids; Transmission electron microscopy; Viscosity; X ray diffraction; Zinc, Thermal conductivity of liquids
Subjects:	Engineering Materials
Divisions:	Director�s Secretariat
Depositing User:	Bidhan Chaudhuri
Date Deposited:	07 Feb 2013 13:18
Last Modified:	07 Feb 2013 13:18
URI:	http://cgcri.csircentral.net/id/eprint/1877

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