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
Computation of the Natural Convection of Nanofluid in a Square Cavity with Homogeneous and Nonhomogeneous Models
TL;DR: In this paper, a numerical study of a laminar natural convection of the CuO-water nanofluid in a square cavity using homogeneous and nonhomogeneous models is presented.
Journal ArticleDOI
A comprehensive comparison of various CFD models for convective heat transfer of Al2O3 nanofluid inside a heated tube
TL;DR: In this article, a case study of the laminar forced convection flow of Al2O3/water nanofluid with 1.6% volume fraction and Re = 1600 in a heated tube is presented, where four types of single-phase models, including Newtonian and non-Newtonian single phase models with assessing the effect of two different thermal dispersion models based on velocity and temperature gradient are compared.
Journal ArticleDOI
Experimental investigation of heat transfer and friction factor with water–propylene glycol based CuO nanofluid in a tube with twisted tape inserts ☆
TL;DR: In this article, the convective heat transfer and friction factor characteristics of water/propylene glycol (70:30% by volume) based CuO nanofluids flowing in a plain tube are investigated experimentally under constant heat flux boundary condition.
Journal ArticleDOI
Prediction of heat transfer due to presence of copper–water nanofluid using resilient-propagation neural network
TL;DR: In this paper, the authors used an Artificial Neural Network (ANN) to predict heat transfer due to laminar natural convection of copper-water nanofluid in a differentially heated square cavity.
Journal ArticleDOI
CFD studies on natural convection heat transfer of Al2O3-water nanofluids
TL;DR: In this paper, numerical simulations of natural convection heat transfer in Al2O3-water nanofluids using computational fluid dynamics approach were performed using Fluent v6.3.
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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