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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Effect of nanofluid variable properties on natural convection in enclosures
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A review and analysis on influence of temperature and concentration of nanofluids on thermophysical properties, heat transfer and pumping power
TL;DR: In this article, a comprehensive analysis has been performed to evaluate the effects on the performance of nanofluids due to variations of density, specific heat, thermal conductivity and viscosity, which are functions of nanoparticle volume concentration and temperature.
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A brief review on viscosity of nanofluids
TL;DR: In this paper, a brief review on theoretical models is presented precisely, and the effects of nanoparticles' shape and size, temperature, volume concentration, pH, etc. are organized together and reviewed.
Journal ArticleDOI
Experimental investigation of forced convective heat transfer coefficient in nanofluids of Al2O3/EG and CuO/EG in a double pipe and plate heat exchangers under turbulent flow
A. Zamzamian,Shahin Nasseri Oskouie,Shahin Nasseri Oskouie,Ahmad Doosthoseini,Aliakbar Joneidi,Aliakbar Joneidi,Mohammad Pazouki +6 more
TL;DR: In this article, the authors measured the forced convective heat transfer coefficient of the nanofluids using theoretical correlations in order to compare the results with the experimental data and evaluated the effects of particle concentration and operating temperature.
Journal ArticleDOI
Heat transfer enhancement in turbulent tube flow using Al2O3 nanoparticle suspension
Sidi El Becaye Maïga,Cong Tam Nguyen,Nicolas Galanis,Gilles Roy,Thierry Maré,Mickaël Coqueux +5 more
TL;DR: In this paper, a numerical method based on the control volume approach was used to solve the system of nonlinear and coupled governing equations of a turbulent flow of nanofluids, which are composed of saturated water and Al2O3 nanoparticles at various concentrations, flowing inside a tube submitted to uniform wall heat flux boundary condition.
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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