Journal ArticleDOI
Investigation on Convective Heat Transfer and Flow Features of Nanofluids
Yimin Xuan,Qiang Li +1 more
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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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Fully developed mixed convection in horizontal and inclined tubes with uniform heat flux using nanofluid
TL;DR: In this paper, the effects of nanoparticles concentration and tube inclinations on the hydrodynamics and thermal parameters are discussed and compared with previously published experimental and numerical works on mixed convection in a horizontal and inclined tube.
Journal ArticleDOI
Preparation, characterization, viscosity, and thermal conductivity of nitrogen-doped graphene aqueous nanofluids
Mohammad Mehrali,Emad Sadeghinezhad,Sara Tahan Latibari,Mehdi Mehrali,Hussein Togun,Hussein Togun,Mohd Nashrul Mohd Zubir,Salim Newaz Kazi,Hendrik Simon Cornelis Metselaar +8 more
TL;DR: In this article, Nitrogen-doped graphene (NDG) nanofluids, with varying concentrations of nanoparticles (0.01, 0.04, and 0.06), were prepared using the two-step method in a 0.025-wt% Triton X-100 (as a surfactant) aqueous solution as a base.
Journal ArticleDOI
Three-Dimensional Flow of an Oldroyd-B Nanofluid towards Stretching Surface with Heat Generation/ Absorption
TL;DR: This article addresses the steady three-dimensional flow of an Oldroyd-B nanofluid over a bidirectional stretching surface with heat generation/absorption effects and sees that the increasing values of the Brownian motion parameter and thermophoresis parameter leads to an increase in the temperature field and thermal boundary layer thickness.
Journal ArticleDOI
Experimental study of Fe2O3/water and Fe2O3/ethylene glycol nanofluid heat transfer enhancement in a shell and tube heat exchanger
TL;DR: In this article, the effect of Fe2O3 nanoparticles on the thermal conductivity of base fluids like ethylene glycol and water was studied in a shell and tube heat exchanger under laminar to turbulent flow condition.
Journal ArticleDOI
Free convection and entropy generation of nanofluid inside an enclosure with different patterns of vertical wavy walls
TL;DR: In this article, the effects of Grashof number and volume fraction of Cu-water nanofluid on natural convection heat transfer and fluid flow inside a two-dimensional wavy enclosure has been investigated numerically.
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.
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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.