Journal ArticleDOI
Investigation on Convective Heat Transfer and Flow Features of Nanofluids
Yimin Xuan,Qiang Li +1 more
TLDR
In this article, an innovative new class of heat transfer fluids can be engineered by suspending metallic nanoparticles in conventional heat-transfer fluids, which are expected to exhibit high thermal conductivities compared to those of currently used heat transfer fluid, and they represent the best hope for enhancing heat transfer.Abstract:
Low thermal conductivity is a primary limitation in the development of energy-efficient heat transfer fluids that are required in many industrial applications. In this paper we propose that an innovative new class of heat transfer fluids can be engineered by suspending metallic nanoparticles in conventional heat transfer fluids. The resulting {open_quotes}nanofluids{close_quotes} are expected to exhibit high thermal conductivities compared to those of currently used heat transfer fluids, and they represent the best hope for enhancement of heat transfer. The results of a theoretical study of the thermal conductivity of nanofluids with copper nanophase materials are presented, the potential benefits of the fluids are estimated, and it is shown that one of the benefits of nanofluids will be dramatic reductions in heat exchanger pumping power.read more
Citations
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Study of viscosity and specific heat capacity characteristics of water-based Al2O3 nanofluids at low particle concentrations
Y. Raja Sekhar,K.V. Sharma +1 more
TL;DR: In this article, the specific heat capacity and viscosity properties of water-based nanofluids containing alumina nanoparticles of 47nm average particle diameter at low concentrations are studied.
Journal ArticleDOI
Critical Issues in Nanofluids Preparation, Characterization and Thermal Conductivity
Journal ArticleDOI
Influence of base fluid, temperature, and concentration on the thermophysical properties of hybrid nanofluids of alumina–ferrofluid: experimental data, modeling through enhanced ANN, ANFIS, and curve fitting
TL;DR: In this paper, an adaptive neuro-fuzzy inference system (ANFIS) and artificial neural network (ANN) were used for predicting the relative viscosity and electrical conductivity of the two types of hybrid ferrofluids.
Journal ArticleDOI
Periodic natural convection in a nanofluid-filled enclosure with oscillating heat flux
TL;DR: In this paper, the authors examined the periodic natural convection in an enclosure filled with nanofluids and found that the use of nanoparticles, in particular Cu, enhances the heat transfer especially at low Rayleigh numbers.
Journal ArticleDOI
Effects on thermophysical properties of carbon based nanofluids: Experimental data, modelling using regression, ANFIS and ANN
Abdullah A.A.A. Al-Rashed,Maryam Soltanpour Gharibdousti,Marjan Goodarzi,Letícia Raquel de Oliveira,Mohammad Reza Safaei,Enio Pedone Bandarra Filho +5 more
TL;DR: Viscosity, density and thermal conductivity of MWCNT-COOH nanoparticles were studied without adding any surfactants or additives for a range of 20°C.
References
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Book
Introduction to Heat Transfer
TL;DR: In this article, the physical concepts and methodologies of heat and mass transfer are explained for advanced undergraduate engineering majors, using a systematic method for problem solving and discusses the relationship of heat transfer to many important practical applications through examples and problems.
Journal ArticleDOI
Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles
Bock Choon Pak,Young I. Cho +1 more
TL;DR: In this article, the authors used a Brookfield rotating viscometer to measure the viscosities of the dispersed fluids with γ-alumina (Al2O3) and titanium dioxide (TiO2) particles at a 10% volume concentration.
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Thermal Conductivity of Heterogeneous Two-Component Systems
R. L. Hamilton,O. K. Crosser +1 more
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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.