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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A numerical study on heat transfer of the nanofluid flow inside helical tube through the two-phase method
TL;DR: In this paper, a new numerical investigation was carried out to study the heat transfer characteristics of nanofluid flow inside a copper helical tube under constant heat flux, and the effects of different parameters such as Reynolds number, nanoflide particle concentration, and constants heat fluxes (1500 and 3800 W/m2) on heat transfer coefficient were studied.
Thermal Convection of Non-Fourier Fluids
TL;DR: In this article, the authors propose a method to solve the problem of "uniformity" in the literature.................................................................................................................iiiiii.1.2.3.
Journal ArticleDOI
Experimental Investigation of Free Convection Heat Transfer from Horizontal Cylinder to Nanofluids
TL;DR: In this article, the results of free convection heat transfer investigation from a horizontal, uniformly heated tube immersed in a nanofluid are presented, and a correlation equation that describes the dependence of the average Nusselt (Nu) number on the Ra number, Pr number and concentration of nanoparticles is proposed.
Journal ArticleDOI
Numerical Study of Heat Transfer Performance of Homogenous Nanofluids under Natural Convection
TL;DR: In this paper, a numerical simulation of Al2O3 nanofluid with water-based nanoparticles with Newtonian behavior has been carried out in the range Ra=10 3 -10 6.
Journal ArticleDOI
An experimental study on the performance of water-based CuO nanofluids in a plate heat exchanger
TL;DR: In this paper , the hydrodynamic and thermal performance of a plate heat exchanger in a modeled heating system with CuO nanofluid have been analyzed experimentally, and the results of the study show that the heat convection coefficient increased with the increase in nanopowder mixture ratio in accordance with the data in the literature.
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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