Journal ArticleDOI
Natural convection of nano-fluids
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
Application of the FCM-based neuro-fuzzy inference system and genetic algorithm-polynomial neural network approaches to modelling the thermal conductivity of alumina–water nanofluids
TL;DR: Two models were established in order to predict the thermal conductivity ratio of alumina–water nanofluids using an FCM-based neuro-fuzzy inference system and genetic algorithm-polynomial neural network as well as experimental data.
Journal ArticleDOI
Numerical Investigation of Natural Convection and Irreversibilities between Two Inclined Concentric Cylinders in Presence of Uniform Magnetic Field and Radiation
TL;DR: In this article, the free convection with volumetric radiation in a water-alumina nanofluid flowing between two inclined concentric cylinders was simulated, and the enclosure, or the cavity between the two cylinders, was shown.
Journal ArticleDOI
Experimental studies on heat transfer and friction factor characteristics of Al2O3/water nanofluid under turbulent flow with spiraled rod inserts
TL;DR: In this article, an experimental investigation on the convective heat transfer and friction factor characteristics in circular tube with spiraled rod inserts (pitch = 15mm, 30mm) under turbulent flow with constant heat flux is carried out with distilled water and Al 2 O 3 /water nanofluids.
Journal ArticleDOI
Impact of two-phase hybrid nanofluid approach on mixed convection inside wavy lid-driven cavity having localized solid block.
Ammar I. Alsabery,Tahar Tayebi,Hakim T. Kadhim,Mohammad Ghalambaz,Ishak Hashim,Ali J. Chamkha +5 more
TL;DR: In this paper, the influence of a two-phase hybrid nanofluid approach on mixed convection characteristics including the consequences of varying Richardson number, number of oscillations, nanoparticle volume fraction, and dimensionless length and position of the solid obstacle was examined.
Journal ArticleDOI
Natural convection flow and heat transfer in an eccentric annulus filled by Copper nanofluid
M. Habibi Matin,Ioan Pop +1 more
TL;DR: In this article, a numerical study of natural convection flow and heat transfer of Copper (Cu)-water nanofluid inside an eccentric horizontal annulus is presented, where inner and outer cylinders are kept at constant temperatures as Th and Tc, respectively.
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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