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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Journal ArticleDOI
Optimal Natural Convection Heat Transfer Improvement by Combining Periodic Heating Temperature, Cavity Inclination, and Nanofluid
TL;DR: In this paper, a square inclined cavity filled with Al2O3-water nanofluid is investigated numerically, where the temperature of the cooled surface is maintained constant, while that of the opposite surface (heating temperature) is varied sinusoidally in time.
Journal ArticleDOI
Statistical approach for prediction of thermal properties of CNC and CNC-CuO nanolubricant using Response Surface Methodology (RSM)
Sakinah Hisham,Kumaran Kadirgama,Devarajan Ramasamy,Mahendran Samykano,Wan Sharuzi Wan Harun,Rahman Saidur +5 more
TL;DR: In this paper, a response surface methodology (RSM) using the miscellaneous design model was performed to optimize thermal properties of Cellulose non-cNC and hybrid of cellulose nanocrystal-copper (II) oxide (CNC-CuO) nanolubricant.
Journal ArticleDOI
Temperature effects on the enhanced or deteriorated buoyancy-driven heat transfer in differentially heated enclosures filled with nanofluids
TL;DR: In this paper, a double-diffusive approach is used to perform a numerical study of natural convection in differentially heated vertical cavities filled with water-based nanofluids, assuming that Brownian diffusion and thermophoresis are the only slip mechanisms by which the solid phase can develop a significant relative velocity with respect to the liquid phase.
Journal ArticleDOI
Hydrothermal features of the magnetite nanoparticles on natural convection flow through a square conduit by using the finite element method
TL;DR: In this article , the impact of magnetized nanoparticles on natural convection flow occupied in a square cavity is discussed through contours and graphs, where the Hartmann number, Rayleigh number and the volume friction coefficient are analyzed.
Numerical investigation of natural convection heat transfer of nanofluids in a C shaped cavity
Resam Dehnavi,Abdollah Rezvani +1 more
TL;DR: In this paper, the heat transfer and fluid flow of natural convection in a C shaped enclosure filled with Al2O3/Water nanofluid that operates under differentially heated walls were analyzed.
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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