SYMPOSIA PAPER Published: 01 August 2012
STP156720120007

Thermal Conductivity and Rheological Behaviour of Al-alloy Dispersed Ethylene Glycol Based Nanofluids

Source

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.

Author Information

Paul, Gayatri
Dept. of Mechanical Engineering, Indian Institute of Technology, Kharagpur, West Bengal, IN
Philip, John
Metallurgy & Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, IN
Raj, Baldev
Metallurgy & Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu, IN
Das, Prasanta, Kumar
Dept. of Mechanical Engineering, Indian Institute of Technology, Kharagpur, West Bengal, IN
Manna, Indranil
Dept. of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, West Bengal, IN CSIR-Central Glass Ceramic Research Institute, Kolkata, West Bengal, IN
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Details
Developed by Committee: D02
Pages: 104–121
DOI: 10.1520/STP156720120007
ISBN-EB: 978-0-8031-7560-0
ISBN-13: 978-0-8031-7555-6