A Review of Thermal Conductivity Models for Nanofluids

Aybar, Hikmet Ş.; Sharifpur, Mohsen; Azizian, M. Reza; Mehrabi, Mehdi; Meyer, Josua P.

doi:10.1080/01457632.2015.987586

Cited by 201 publications

(81 citation statements)

References 108 publications

(118 reference statements)

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“…The thermal conductivity enhanced by 40% when copper nanoparticles with the volume fraction less than 1% are added to the ethylene glycol or oil was studied by Eastman et al [3]. The enhancement of thermal conductivity of various nanofluids was reviewed by Aybar et al [4]. They confirmed that the addition of nanoparticles in the fluids increases the thermal conductivity.…”

Section: Introductionmentioning

confidence: 52%

“…Lee et al [2] confirmed that the nanofluids possess outstanding heat transfer characteristics compared to those of base fluids. Later on, many investigators [3][4][5][6][7] have indicated that the nanofluids enhanced thermophysical characteristics and heat transfer behavior compared to the base fluids. The thermal conductivity enhanced by 40% when copper nanoparticles with the volume fraction less than 1% are added to the ethylene glycol or oil was studied by Eastman et al [3].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Slip Boundary Condition on Casson Nanofluid Flow over a Stretching Sheet in the Presence of Viscous Dissipation and Chemical Reaction

Afify

2017

Mathematical Problems in Engineering

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The impacts of multiple slips with viscous dissipation on the boundary layer flow and heat transfer of a non-Newtonian nanofluid over a stretching surface have been investigated numerically. The Casson fluid model is applied to characterize the non-Newtonian fluid behavior. Physical mechanisms responsible for Brownian motion and thermophoresis with chemical reaction are accounted for in the model. The governing nonlinear boundary layer equations through appropriate transformations are reduced into a set of nonlinear ordinary differential equations, which are solved numerically using a shooting method with fourth-order Runge-Kutta integration scheme. Comparisons of the numerical method with the existing results in the literature are made and an excellent agreement is obtained. The heat transfer rate is enhanced with generative chemical reaction and concentration slip parameter, whereas the reverse trend is observed with destructive chemical reaction and thermal slip parameter. It is also noticed that the mass transfer rate is boosted with destructive chemical reaction and thermal slip parameter. Further, the opposite influence is found with generative chemical reaction and concentration slip parameter.

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Section: Introductionmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

The Influence of Slip Boundary Condition on Casson Nanofluid Flow over a Stretching Sheet in the Presence of Viscous Dissipation and Chemical Reaction

Afify

2017

Mathematical Problems in Engineering

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“…The temperature raise increases the thermal conductivity of the nanofluids. Currently a model, which estimates the thermal conductivity to one that is generally accepted, does not exist [21][22][23][24]. Although there are no theoretical results available M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 in the literature that predict accurately the thermal conductivity of nanofluids, there are a number of semi-empirical relations that take into account the most significant parameters.…”

Section: Introductionmentioning

confidence: 98%

Effect of temperature and sonication time on nanofluid thermal conductivity measurements by nano-flash method

Buonomo¹,

Manca²,

Marinelli³

et al. 2015

Applied Thermal Engineering

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“…The convective heat transfer characteristics of nanofluids depend on the thermo-physical properties of the base fluid and the ultra fine particles, the flow pattern and flow structure, the volume fraction of the suspended particles, the dimensions and the shape of these particles. The properties of nanofluids have made them potentially useful in many practical applications in industrial, commercial, residential and transportation sectors [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Thermal instability in a rotating nanofluid layer: A revised model

Yadav

Agrawal

Lee

2016

Ain Shams Engineering Journal

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In this paper, the analysis of thermal instability of rotating nanofluid layer is revised with a physically more realistic boundary condition on the nanoparticle volumetric fraction i.e. the nanoparticle flux is assumed to be zero rather than prescribing the nanoparticle volumetric fraction on the rigid impermeable boundaries. This shows that the nanoparticle fraction value at the boundary adjusts accordingly. In this respect, the present model is more realistic physically than those of the previous investigations. The numerical computations are presented for water-based nanofluids with alumina and copper nanoparticles. For Alumina-water nanofluid, zero flux nanoparticle boundary condition has more destabilizing effect than the constant nanoparticle boundary conditions, while reverse for copper-water nanofluid. The effect of rotation is found to have a stabilizing effect. Further, volumetric fraction of nanoparticles / Ã 0 , the Lewis number L e , the density ratio R q and modified diffusivity ratio N A are found to destabilize the system. Ó 2015 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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A Review of Thermal Conductivity Models for Nanofluids

Cited by 201 publications

References 108 publications

The Influence of Slip Boundary Condition on Casson Nanofluid Flow over a Stretching Sheet in the Presence of Viscous Dissipation and Chemical Reaction

The Influence of Slip Boundary Condition on Casson Nanofluid Flow over a Stretching Sheet in the Presence of Viscous Dissipation and Chemical Reaction

Effect of temperature and sonication time on nanofluid thermal conductivity measurements by nano-flash method

Thermal instability in a rotating nanofluid layer: A revised model

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