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
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Develop optimal network topology of artificial neural network (AONN) to predict the hybrid nanofluids thermal conductivity according to the empirical data of Al2O3 – Cu nanoparticles dispersed in ethylene glycol
Yeping Peng,Amir Parsian,Hossein Khodadadi,Mohammad Akbari,Kamal Ghani,Marjan Goodarzi,Quang-Vu Bach +6 more
TL;DR: In this paper, an artificial neural network (ANN) approach is used to determine the thermal conductivity of Al2O3 -Cu / EG with an equal volume (50:50).
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Experimental investigation of thermophysical properties of Al2O3–water nanofluid: Role of surfactants
TL;DR: In this article, the stability and properties of Al 2 O 3 -water nanofluid and the effect of surfactant on those; the effects of both temperature (20-60 °C) and solid volume fraction (0.1-2.0%) of nanophoton suspensions are also analyzed.
Journal ArticleDOI
Boundary and internal heat source effects on the onset of Darcy–Brinkman convection in a porous layer saturated by nanofluid
TL;DR: In this paper, the effect of internal heat source on the onset of Darcy-Brinkman convection in a porous layer saturated by nanofluid is studied, and the resulting eigenvalue problem is solved numerically using the Galerkin technique with the Rayleigh number as the eigen value.
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On the rheological properties of MWCNT-TiO2/oil hybrid nanofluid: An experimental investigation on the effects of shear rate, temperature, and solid concentration of nanoparticles
TL;DR: In this article, the effects of shear rate, temperature, and solid concentration of nanoparticles on the rheological properties of TiO2-MWCNT (80%−20%)/oil (5 W50) nanofluid was examined.
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Experimental investigation into the convective heat transfer and system-level effects of Al 2 O 3 -propanol nanofluid
Andrew D. Sommers,Kirk L. Yerkes +1 more
TL;DR: In this article, dilute suspensions of 10 nm aluminum oxide nanoparticles in propanol (0.5, 1, and 3 wt%) were investigated, and changes in density, specific heat, and thermal conductivity with particle concentration were measured and found to be linear, whereas changes in viscosity were nonlinear and increased sharply with particle loading.
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.