Extended Maxwell model for the thermal conductivity of nanofluids that accounts for nonlocal heat transfer

Shaker, M; Birgersson, Erik; Mujumdar, Arun S.

doi:10.1016/j.ijthermalsci.2014.05.010

Cited by 27 publications

(5 citation statements)

References 47 publications

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“…(11)) gives a good result for welldispersed non-interacting spherical-shaped particles with low particle volume concentrations (< 1% [51]) and negligible thermal resistance at the particle-fluid interface. Shaker et al [53] recently proposed an extended Maxwell model as Eq. (12) for the thermal conductivity of nanofluids.…”

Section: Existing Theoretical and Empirical Modelsmentioning

confidence: 99%

Experimental investigation and model development for thermal conductivity of α-Al2O3-glycerol nanofluids

Sharifpur

Ntumba

Meyer

et al. 2017

International Communications in Heat and Mass Transfer

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A B S T R A C TIn order to investigate the effect of nanoparticle volume fraction, nanoparticle size and temperature on the thermal conductivity of glycerol based alumina (α-Al 2 O 3 ) nanofluids, a set of experiments were carried out for temperature ranging from 20°C to 45°C. The nanofluids contained α-Al 2 O 3 nanoparticles of three different sizes (31 nm, 55 nm and 134 nm) were prepared by two-step method at volume fractions ranging from 0.5% to 4%. The experimental results show that α-Al 2 O 3 -glycerol nanofluids have substantially higher thermal conductivity than the base fluid and the maximum enhancement of the relative thermal conductivity was 19.5% for the case of 31 nm at 4% volume fraction. The data analyses indicated that the volume fraction and size of the nanoparticles have significant effects on the thermal conductivity ratio (TCR) of Al 2 O 3 -glycerol nanofluids, while the temperature has almost no significant effect on the data for range of this study. At room temperature, the effective thermal conductivity remains almost constant for 50 h at 4% volume fractions. The comparison of the obtained experimental data and predictions from some existing theoretical and empirical models reveals that the thermal conductivity ratio and its trend could not be accurately explained by the models in open literature. Consequently, a new empirical correlation based on the experimental data has been developed in this study.

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Section: Existing Theoretical and Empirical Modelsmentioning

confidence: 99%

Experimental investigation and model development for thermal conductivity of α-Al2O3-glycerol nanofluids

Sharifpur

Ntumba

Meyer

et al. 2017

International Communications in Heat and Mass Transfer

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“…They explained that if the ballistic phonons initiated in one particle can persist in the liquid and reach a nearby particle, a major increase of thermal conductivity is expected, which is possible in nanofluids where the separation between particles is very small even at small volume fractions. The modified Maxwell model proposed by Shaker et al [107] which accounts for nanoscale heat transport by modifying the Fourier's law for heat flux is an example of a model that is based on nanoscale heat transport.…”

Section: Nanoscale Heat Transportmentioning

confidence: 99%

A survey of practical equations for prediction of effective thermal conductivity of spherical-particle nanofluids

Vatani

Woodfield

Dao

2015

Journal of Molecular Liquids

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“…A two-step method was considered for the preparation of CNT nanofluid. First, a surfactant solution was prepared using Sodium-Dodecyl-Benzene-Sulfonate (SBBS), then MWCNT nanoparticles were mixed with the solution, and a 1:1 ratio of surfactant/MWCNT was maintained 21 – 23 . The prepared solution was applied for magnetic steer for up to 10 min at 500 rpm and then treated with ultra-sonicated for 40 min to disperse the MWCNT in the solution.…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation on a solar parabolic collector using water-based multi-walled carbon-nanotube with low volume concentrations

Talugeri

Pattana

Nasi

et al. 2023

Sci Rep

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A limited experimental work was on multi-walled carbon nanotube (MWCNT)—water nanofluid with surfactant in the solar parabolic collector at low volume concentrations. At high-volume concentrated nanofluid, the pressure drop was more due to an increase in the viscosity of the working fluid and an increase in the nanoparticle cost; hence it is not economical. This report attempted to use Sodium Dodecyl Benzene Sulfonate (SDBS) surfactant in the low-volume concentrated MWCNT-water nanofluid to establish effective heat transfer in solar parabolic collector applications. The stable MWCNT-water nanofluid was prepared at 0.0158, 0.0238, and 0.0317 volume concentrations. The experiments were conducted from 10:00 to 16:00 at 6, 6.5 and 7 L/min flow rates concerning ASHRAE Standards. At the 7 L/min flow rate of the working fluid, having a minimum temperature difference between the working fluid and absorber tube leads to better heat transfer. The increased volume concentration of MWCNT in the water enhances the surface area interaction between water and MWCNT nanoparticles. This results in maximum solar parabolic collector efficiency at 0.0317 vol% with a 7 L/min flow rate and 10–11% higher than the distilled water.

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Extended Maxwell model for the thermal conductivity of nanofluids that accounts for nonlocal heat transfer

Cited by 27 publications

References 47 publications

Experimental investigation and model development for thermal conductivity of α-Al2O3-glycerol nanofluids

Experimental investigation and model development for thermal conductivity of α-Al2O3-glycerol nanofluids

A survey of practical equations for prediction of effective thermal conductivity of spherical-particle nanofluids

Experimental investigation on a solar parabolic collector using water-based multi-walled carbon-nanotube with low volume concentrations

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