Journal ArticleDOI
Effect of Particle Size on Thermal Conductivity of Nanofluid
TLDR
In this paper, the impact of Al2Cu and Ag2Al nanoparticle size and volume fraction on the effective thermal conductivity of water and ethylene glycol based nanofluid prepared by a two-stage process comprising mechanical alloying of appropriate Al-Cu and Al-Ag elemental powder blend followed by dispersing these nanoparticles (1 to 2 vol pct) in water and glycol with different particle sizes.Abstract:
Nanofluids, containing nanometric metallic or oxide particles, exhibit extraordinarily high thermal conductivity. It is reported that the identity (composition), amount (volume percent), size, and shape of nanoparticles largely determine the extent of this enhancement. In the present study, we have experimentally investigated the impact of Al2Cu and Ag2Al nanoparticle size and volume fraction on the effective thermal conductivity of water and ethylene glycol based nanofluid prepared by a two-stage process comprising mechanical alloying of appropriate Al-Cu and Al-Ag elemental powder blend followed by dispersing these nanoparticles (1 to 2 vol pct) in water and ethylene glycol with different particle sizes. The thermal conductivity ratio of nanofluid, measured using an indigenously developed thermal comparator device, shows a significant increase of up to 100 pct with only 1.5 vol pct nanoparticles of 30- to 40-nm average diameter. Furthermore, an analytical model shows that the interfacial layer significantly influences the effective thermal conductivity ratio of nanofluid for the comparable amount of nanoparticles.read more
Citations
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Journal ArticleDOI
I and i
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Journal ArticleDOI
Enhanced thermal conductivity of nanofluids: a state-of-the-art review
TL;DR: In this article, effective thermal conductivity models of nanofluids are reviewed and comparisons between experimental findings and theoretical predictions are made, and the results show that there exist significant discrepancies among the experimental data available and between the experimental results and the theoretical model predictions.
Journal ArticleDOI
Experimental and theoretical studies of nanofluid thermal conductivity enhancement: a review
Clement Kleinstreuer,Yu Feng +1 more
TL;DR: Focusing mainly on dilute suspensions of well-dispersed spherical nanoparticles in water or ethylene glycol, recent experimental observations, associated measurement techniques, and new theories as well as useful correlations have been reviewed.
Journal ArticleDOI
Review on thermal properties of nanofluids: Recent developments.
S. A. Angayarkanni,John Philip +1 more
TL;DR: The preparation of nanofluids by various techniques, methods of stabilization, stability measurement techniques, thermal conductivity and heat capacity studies, proposed mechanisms of heat transport, theoretical models on thermal Conductivity, factors influencing k and the effect of nanoinclusions in PCM are discussed in this review.
Journal ArticleDOI
Review of Heat Conduction in Nanofluids
Jing Fan,Liqiu Wang +1 more
TL;DR: In this paper, a review of the thermal conductivity of nanofluids is presented, focusing on the experimental data, proposed mechanisms responsible for its enhancement, and its predicting models.
References
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Journal ArticleDOI
I and i
TL;DR: There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.
Book
A Treatise on Electricity and Magnetism
TL;DR: The most influential nineteenth-century scientist for twentieth-century physics, James Clerk Maxwell (1831-1879) demonstrated that electricity, magnetism and light are all manifestations of the same phenomenon: the electromagnetic field as discussed by the authors.
Book
Smithells metals reference book
TL;DR: In this paper, the authors present an X-ray analysis of metallic materials and their properties, such as elastic properties, damping capacity and shape memory alloys, as well as their properties of metal and alloys.
Journal ArticleDOI
Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles
TL;DR: In this paper, it was shown that a "nanofluid" consisting of copper nanometer-sized particles dispersed in ethylene glycol has a much higher effective thermal conductivity than either pure or pure glycol or even polyethylene glycol containing the same volume fraction of dispersed oxide nanoparticles.