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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Heat Transfer and Friction Factor With Water/Propylene Glycol-Based CuO Nanofluid in Circular Tube with Helical Inserts Under Transition Flow Regime
TL;DR: In this article, the authors dealt with the transition flow convective heat transfer and friction factor characteristics of water/propylene glycol-based CuO nanofluids flowing in a horizontal circular tube fitted with and without helical inserts.
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Experimental investigation and mechanism analysis: Effect of nanoparticle size on viscosity of nanofluids
TL;DR: In this article, a series of experiments were performed by dispersing two different nanoparticles (Al2O3 and ZnO) respectively into engine oil in different particle size (20-100nm) with volume fraction ranging from 1% to 15%.
Journal ArticleDOI
A Semi-Empirical Model for Predicting the Effective Dynamic Viscosity of Nanoparticle Suspensions
TL;DR: A semi-empirical model for predicting the effective dynamic viscosity of nanofluids, based on a single set of experimental data available in the literature for silica nanoparticles suspended into ethanol, is presented and discussed in this paper.
Journal ArticleDOI
Conjugate natural convection in an inclined nanofluid‐filled enclosure
TL;DR: In this paper, the authors numerically examined the conjugate natural convection in an inclined enclosure with a conducting centred block, which was filled with an Ethylene Glycol-copper nanofluid.
Journal ArticleDOI
Simulation of heat transfer enhancement in nanofluids using dissipative particle dynamics
TL;DR: In this article, the authors applied dissipative particle dynamics (DPD) approach to investigate heat transfer within nanofluids, and the DPD approach was applied to study natural convection in a differential heated enclosure by considering the viscosity and the thermal conductivity of the nanoparticles to be dual function of temperature and volume fraction of nanoparticles.
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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