Open Access
Heat transfer enhancement by using nanofluids in forced convection flows
Sidi El Becaye Maïga,Samy Joseph Palm,Cong Tarn Nguyen,Gilles Roy,Nicolas Galanis +4 more
- Vol. 26, Iss: 4, pp 530-546
TLDR
In this paper, the problem of laminar forced convection flow of nanofluids has been thoroughly investigated for two particular geometrical configurations, namely a uniformly heated tube and a system of parallel, coaxial and heated disks.Abstract:
The problem of laminar forced convection flow of nanofluids has been thoroughly investigated for two particular geometrical configurations, namely a uniformly heated tube and a system of parallel, coaxial and heated disks. Numerical results, as obtained for water-γAl 2 O 3 and Ethylene Glycol-γAl 2 O 3 mixtures, have clearly shown that the inclusion of nanoparticles into the base fluids has produced a considerable augmentation of the heat transfer coefficient that clearly increases with an increase of the particle concentration. However, the presence of such particles has also induced drastic effects on the wall shear stress that increases appreciably with the particle loading. Among the mixtures studied, the Ethylene Glycol -γAl 2 O 3 nanofluid appears to offer a better heat transfer enhancement than water- γ/Al 2 O 3 ; it is also the one that has induced more pronounced adverse effects on the wall shear stress. For the case of tube flow, results have also shown that, in general, the heat transfer enhancement also increases considerably with an augmentation of the flow Reynolds number. Correlations have been provided for computing the Nusselt number for the nanofluids considered in terms of the Reynolds and the Prandtl numbers and this for both the thermal boundary conditions consideredread more
Citations
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A critical review of heat transfer enhancement methods in the presence of porous media, nanofluids, and microorganisms
M. Habibishandiz,M. Ziad Saghir +1 more
TL;DR: In this paper , an extensive literature review is conducted for three widely used passive techniques including porous media, nanofluids, and microorganisms, and the overwhelming majority of studies proved the contributing role of microorganisms on heat transfer enhancement.
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Utilization of zinc-ferrite/water hybrid nanofluids on thermal performance of a flat plate solar collector—a thermal modeling approach
P. Michael Joseph Stalin,T.V. Arjunan,Mohammed A. Almeshaal,Palaniappan Murugesan,Balaramachandran Prabu,Pasupathi Manoj Kumar +5 more
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A novel empirical equation for the effective viscosity of nanofluids based on theoretical and empirical results
Mohamad Klazly,Gabriella Bognár +1 more
TL;DR: In this article , the authors proposed a new correlation based on an analysis of approximately 1200 experimental and 4000 theoretical data tested for about 50 types of nanofluids in the temperature range 273-333 K and particle diameters 2-300 nm.
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A minireview on nanofluids for automotive applications: current status and future perspectives
TL;DR: In this paper , a review of automotive applications of nanofluids is presented, where the experimental reports on the various properties of nanophotonics along with correlations for nanophluids have been specified.
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Nanofluid Heat Transfer: Enhancement of the Heat Transfer Coefficient inside Microchannels
TL;DR: In this article , Fe3O4 nanoparticles were introduced into the base liquid to enhance the heat transfer coefficient inside the microchannels and to provide a better understanding of the impact of the connector between two micro-channel.
References
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Journal ArticleDOI
Investigation on Convective Heat Transfer and Flow Features of Nanofluids
Yimin Xuan,Qiang Li +1 more
TL;DR: 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.
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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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The Viscosity of Concentrated Suspensions and Solutions
TL;DR: In this paper, an expression for the viscosity of solutions and suspensions of finite concentration is derived by considering the effect of the addition of one solute-molecule to an existing solution, which is considered as a continuous medium.
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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.