Journal ArticleDOI
Natural convection of nano-fluids
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TLDR
In this article, an apparently paradoxical behaviour of heat transfer deterioration was observed in nano-fluid and its dependence on parameters such as particle concentration, material of the particles and geometry of the containing cavity have been investigated.Abstract:
Fluids with nano size solid particles suspended in them have been given the name nano-fluid which in recent studies have shown tremendous promise as heat transfer fluids. However, before suggesting such fluids for applications a thorough knowledge of physical mechanism of heat transfer in such fluids is wanted. The present study deals with one such aspect of natural convection of nano fluids inside horizontal cylinder heated from one end and cooled from the other. An apparently paradoxical behaviour of heat transfer deterioration was observed in the experimental study. Nature of this deterioration and its dependence on parameters such as particle concentration, material of the particles and geometry of the containing cavity have been investigated. The fluid shows characters distinct from that of common slurries.read more
Citations
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Journal ArticleDOI
Combined thermophoresis, Brownian motion and Dufour effects on natural convection of nanofluids
TL;DR: In this paper, the authors investigated thermophoresis of nanoparticles and the Dufour effect on natural convective heat transfer on nanofluids and derived a closed form expression to estimate Nusselt number of natural convection heat transfer for different volume fractions based on the pure water (base fluid) Nussellt number.
Journal Article
"Experimental Investigation Of Mixed Convection With Water-Al2O3 & Hybrid Nanofluid In Inclined Tube For Laminar Flow"
TL;DR: In this article, the effects of nanoparticles concentration and power supply on the development of the thermal field are studied and discussed under laminar flow condition, and two new correlations are proposed to calculate the Nusselt number in the fully developed region for horizontal and vertical tubes volume concentrations up to 4%.
Journal ArticleDOI
Natural convection of microparticle suspensions in thin enclosures
TL;DR: In this article, the authors performed natural convection experiments with aluminum oxide microparticle aqueous suspensions in thin enclosures of circular planform at angles of inclination to the horizontal of 90°, 30° and 0°.
Journal ArticleDOI
Experimental study on natural convection of MWCNT-water nanofluids in a square enclosure
TL;DR: In this paper, the thermal conductivities and viscosities for the nanofluids were experimentally determined and the experimental results on natural convection yielded a maximum enhancement in heat transfer performance of 45% at volume concentration of 0.1%.
Journal ArticleDOI
Heat transfer study on concentric tube heat exchanger using TiO2–water based nanofluid
TL;DR: In this paper, the heat transfer characteristics of TiO2-water nanofluids as a coolant in concentric tube heat exchanger are presented, which is fabricated from copper concentric inner tube with length 1000mm.
References
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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.
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.
Journal ArticleDOI
Thermal Conductivity of Heterogeneous Two-Component Systems
R. L. Hamilton,O. K. Crosser +1 more
Journal ArticleDOI
Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles
TL;DR: In this paper, a transient hot-wire method was used to measure the thermal conductivity of a small amount of nanoparticles and the experimental results showed that these nanoparticles have substantially higher thermal conductivities than the same liquids without nanoparticles.
Journal ArticleDOI
Conceptions for heat transfer correlation of nanofluids
Yimin Xuan,Wilfried Roetzel +1 more
TL;DR: In this article, the authors proposed two different approaches for deriving heat transfer correlation of the nanofluid, and investigated the mechanism of heat transfer enhancement of the nano-fluid.
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