Thermal Conductivity of Heterogeneous Two-Component Systems

Hamilton, Rick; Crosser, O.K.

doi:10.1021/i160003a005

Cited by 3,179 publications

(1,404 citation statements)

References 3 publications

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“…The existing classical models (Maxwell 1873;Hamilton and Crosser 1962) are found to be incapable to anticipate the anomalously high thermal conductivity of nanofluids. This is due to reason that classical models do not incorporate the effects of particle size, the particle/liquid interfacial layer and distribution which are considered as significant mechanisms for enhanced thermal conductivity of nanofluids.…”

Section: Model IIImentioning

confidence: 99%

“…The classical theoretical approach for the conductivity measurement solid-fluid suspensions (Maxwell 1873;Hamilton and Crosser 1962) could not justify the experimental results in which the large enhancement of the thermal conductivity in case of low concentrations of nanoparticles. To overcome this limitations of classical theory, the new mechanisms have been first proposed by Wang et al (2003) for the enhanced thermal transport in case of nanofluids, such as particle motion, surface action, and electro-kinetic effects.…”

Section: Introductionmentioning

confidence: 99%

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Mixed convection flow along an inclined permeable plate: effect of magnetic field, nanolayer conductivity and nanoparticle diameter

Rana

Bég²

2014

Appl Nanosci

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Steady, two-dimensional mixed convection boundary layer flow of an incompressible Al 2 O 3 -water nanofluid along an inclined permeable plate in the presence of transverse magnetic field has been examined numerically. The governing equations (Boussinesq approximation) with associated boundary condition are solved using FEM for nanofluid containing spherical-shaped nanoparticles having volume fraction ranging from 1 to 4 %. Staticbased model for calculating the effective thermal conductivity at 300 K, proposed by Leong et al. (J Nanopart Res 8:245-254, 2006) and Murshed et al. (Int J Therm Sci 47:560-568, 2008) has been implemented. Effect of various pertinent parameters with different classical and experimental models for effective dynamic viscosity is discussed.

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Section: Model IIImentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mixed convection flow along an inclined permeable plate: effect of magnetic field, nanolayer conductivity and nanoparticle diameter

Rana

Bég²

2014

Appl Nanosci

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“…Figs. 14 and 15 indicated the experimental measurements of the thermal conductivity that compared with the thermal conductivity models of many researchers such as Wasp model [19], Hamilton and Crosser [20], Maxwell model [21] and Timo Feeva et al model [22]. These results showed a good agreement between the Wasp model.…”

Section: Measurement Of the Nanofluid Thermal Propertiesmentioning

confidence: 64%

Experimental Analysis of Heat Transfer Enhancement and Flow with Cu, TiO2 Ethylene Glycol Distilled Water Nanofluid in Spiral Coil Heat

Sultan

2017

Tikrit j. eng. sci.

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Nanofluid ethylene glycol enhancement metallic nano metallic A R T I C L E I N F O A B S T R A C TThis experimental investigation was performed to improve heat transfer in the heat exchanger (tube of shell and helically coiled (using nanoparticles for turbulent parallel flow and counter flow of distilled water (Dw) and ethylene glycol (EG) fluids. Six types of nanofluids have been used namely: copper -distilled water, copper -distilled water and ethylene glycol, copper -ethylene glycol, titanium oxide -distilled water, titanium oxide -distilled water and ethylene glycol, titanium oxide -ethylene glycol with 0.5%,1%,2%,3% and 5% volume concentration as well as the range of Reynolds number are 4000 -15000. The experimental results reveal that an increase in coefficient of heat transfer of 50.2 % to Cu -Dw, 41.5% to Cu -( EG + Dw ), 32.12 % for Cu -EG , 36.5% for TiO2 -Dw, 30.2 % to TiO2 -( EG + Dw) and 25.5%, to TiO2 -EG . The strong nanoconvection currents and good mixing caused by the presence of Cu and TiO2 nanoparticles. The metal nanofluids give more improvement than oxide nanofluids. The shear stress of nanofluids increases with concentration of nanoparticles in the case of parallel and counter flow. The effect of flow direction is insignificant on coefficient of overall heat transfer and the nanofluids behave as the Newtonian fluid for 0.5%,1%,2%,3% and 5%. Good assent between the practical data and analytical prediction to nanofluids friction factor which means the nanofluid endure pump power with no penalty. This study reveals that the thermal performance from nanofluid Cu -Dw is higher than Cu -(EG + Dw) and Cu -EG due to higher thermal conductivity for the copper and distilled water compared with ethylene glycol.

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“…A number of theoretical mechanisms proposed so far [12], [13] have been unable to account for one or the other important factors affecting the effective thermal conductivity of a nanofluid These include thermal conductivity of the fluid medium, thermal conductivity of the nanoparticle dispersed, nanoparticle size and its volume fraction, formation of layer around the nanoparticle etc. Yu and Choi [14] have improved the Maxwell model to incorporate the concept of interfacial layer as a more ordered layer is found to have major impact on the nanofluids thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

The Interfacial Layer Effect on Thermal Conductivity of Nano-Colloidal Dispersions

Pasrija¹,

Srivastava²

2014

IJAPM

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Abstract-A mathematical model has been proposed for calculating the effective Thermal Conductivity of nano colloidal dispersions by incorporating a thermal conductivity profile for the interfacial layer. The present model has been successfully applied to the colloidal dispersions containing rod shaped nanoparticles as well as those containing spherical nanoparticles. The results have also been compared with other existing models.Index Terms-Thermal conductivity, nanofluids, colloidal dispersion and interfacial layer.

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Thermal Conductivity of Heterogeneous Two-Component Systems

Cited by 3,179 publications

References 3 publications

Mixed convection flow along an inclined permeable plate: effect of magnetic field, nanolayer conductivity and nanoparticle diameter

Mixed convection flow along an inclined permeable plate: effect of magnetic field, nanolayer conductivity and nanoparticle diameter

Experimental Analysis of Heat Transfer Enhancement and Flow with Cu, TiO2 Ethylene Glycol Distilled Water Nanofluid in Spiral Coil Heat

The Interfacial Layer Effect on Thermal Conductivity of Nano-Colloidal Dispersions

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