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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MHD Natural Convection in a Nanofluid-filled Enclosurewith Non-uniform Heating on Both SideWalls
TL;DR: In this paper, a Lattice Boltzmann method was applied to solve the governing equations for fluid velocity and temperature in a square enclosure filled with a water-Al2O3 nanofluid and subjected to a magnetic field.
Journal ArticleDOI
Two numerical modelings of free convection heat transfer using nanofluids inside a square enclosure
Douglas Fontes,Daniel Dall’Onder dos Santos,Elie Luis Martínez Padilla,Enio Pedone Bandarra Filho +3 more
TL;DR: In this article, the numerical simulation of natural convection heat transfer of Cu-water nanofluids in a square enclosure for Rayleigh numbers varying from 103 up to 105 was described.
Journal ArticleDOI
Numerical investigation on natural convection of Al2O3/water nanofluid with variable properties in an annular enclosure under magnetic field
Farid Berrahil,Abdelkader Filali,Abdelkader Filali,Cherifa Abid,Smail Benissaad,Rachid Bessaïh,Omar Matar +6 more
TL;DR: In this paper, an in-house Fortran code has been developed to solve the system of equations governing the magneto-hydrodynamic flow of Al2O3-water nanofluid under a uniform magnetic field.
Journal ArticleDOI
Determination of the Single-Phase Forced Convection Heat Transfer Characteristics of TiO2Nanofluids Flowing in Smooth and Micro-Fin Tubes by Means of CFD and ANN Analyses
Nurullah Kayaci,Muhammet Balcilar,Mahdi Tabatabaei,Ali Celen,Oğuzhan Yıldız,Ahmet Selim Dalkılıç,Somchai Wongwises +6 more
TL;DR: In this article, a multilayer perceptron (MLP) was used to determine the most agreeable physical properties of TiO 2 nanofluids among correla- tions.
Journal ArticleDOI
Mixed convection boundary-layer flow about an isothermal solid sphere in a nanofluid
TL;DR: In this paper, the Keller-box method was used to solve the mixed convection boundary-layer flow of a nanofluid about a solid sphere with constant surface temperature for cases of both assisting and opposing flows.
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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