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
Conjugate Natural Convection of Nanofluids in an Enclosure with a Volumetric Heat Source
M. R. Alizadeh,Ali A. Dehghan +1 more
TL;DR: In this paper, the authors presented a numerical investigation of conjugate natural convection of water-based nanofluids in a square cavity, where two different types of nanophluids, namely Al2O3-water and CuO-water, were considered as working fluids.
Journal ArticleDOI
Numerical Study of Mixing Thermal Conductivity Models for Nanofluid Heat Transfer Enhancement
TL;DR: In this article, an in-house numerical program has been developed to analyze the effects of the grid nodes, effective viscosity model, boundary-layer thickness, and mixing thermal conductivity model on the nanofluid heat transfer enhancement.
Journal ArticleDOI
Natural convection in square enclosures differentially heated at sides using alumina-water nanofluids with temperature-dependent physical properties
TL;DR: In this paper, a computational code based on the SIMPLE-C algorithm is used for the solution of the system of mass, momentum and energy transfer governing equations, assuming that the thermophysical properties appearing in them are the nanofluid effective properties.
Journal ArticleDOI
Comparative Numerical Study of Nanofluid Heat Transfer through an Annular Channel
TL;DR: In this article, a comparison was made between single-phase and two-phase models (mixture and Eulerian) to find out which one predicts experimental data more accurately.
Journal ArticleDOI
Heat transfer and pressure drop performance of alumina–water nanofluid in a flat vertical tube of a radiator
TL;DR: In this article, the effects of nanofluid inlet temperature (40-90°C), Reynolds number (12,000-30,000), particle concentration (0-1 vol%), and air velocity (0.25-0.
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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