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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Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity.
TL;DR: Experimental and theoretical investigations have been conducted to determine the effect of CuO nanowires on the thermal conductivity and viscosity of dimethicone based nanofluids, and the analysis indicated that the as-prepared CuO Nanowires had high purity, monocrystalline with a monoclinic structure and large aspect ratio compared toCuO nanospheres.
Journal ArticleDOI
Numerical solution for mixed convection boundary layer flow of a nanofluid along an inclined plate embedded in a porous medium
TL;DR: The steady mixed convection boundary layer flow of an incompressible nanofluid along a plate inclined at an angle @a in a porous medium is studied and the Nusselt number is found to decrease with increasing Brownian motion number (Nb) or thermophoresis number (nt), whereas it increases with increasing angle @ a.
Journal ArticleDOI
A survey on experimental and numerical studies of convection heat transfer of nanofluids inside closed conduits
Mohammad Reza Safaei,Mostafa Safdari Shadloo,Mohammad Shahab Goodarzi,Abdellah Hadjadj,Hamid Reza Goshayeshi,Masoud Afrand,Salim Newaz Kazi +6 more
TL;DR: Nanofluids are solid/liquid suspensions of higher thermal conductivity and viscosity compared to common working fluids as mentioned in this paper, and their application in heat transfer enhancement is prospective. But their performance is limited.
Journal ArticleDOI
Doubly stratified mixed convection flow of Maxwell nanofluid with heat generation/absorption
TL;DR: In this article, a doubly stratified flow of Maxwell nanofluid in presence of mixed convection is analyzed and the effects of thermophoresis, Brownian motion and heat generation/absorption are present.
Journal ArticleDOI
Viscosity, thermal and electrical conductivity of silicon dioxide–ethylene glycol transparent nanofluids: An experimental studies
Gaweł Żyła,Jacek Fal +1 more
TL;DR: In this article, the authors present the results of experimental investigation of viscosity, thermal and electrical conductivity of transparent suspensions of silicon dioxide (SiO2) nanoparticles in ethylene glycol (EG).
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.
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.