A novel correlation approach for viscosity prediction of water based nanofluids of Al 2 O 3 , TiO 2 , SiO 2 and CuO

Meybodi, Mahdi Kalantari; Daryasafar, Amin; Koochi, Mehran Moradi; Moghadasi, Jamshid; Meybodi, Roohollah Babaei; Ghahfarokhi, Ali Khorram

doi:10.1016/j.jtice.2015.05.032

Cited by 56 publications

(13 citation statements)

References 26 publications

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“…The experimental measurements and theoretical predictions on the viscosity of nanofluids are still in the analysis stage, and the experimental results of viscosity in the different literature are not consistent 59 . The empirical models are also not suitable for the predictions of viscosity of other types of nanofluids.…”

Section: Resultsmentioning

confidence: 95%

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Zhu

Wang

et al. 2018

Sci Rep

134

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Nanofluids offer the exciting new possibilities to enhance heat transfer performance. In this paper, experimental and theoretical investigations have been conducted to determine the effect of CuO nanowires on the thermal conductivity and viscosity of dimethicone based nanofluids. The CuO nanowires were prepared through a thermal oxidation method, and the analysis indicated that the as-prepared CuO nanowires had high purity, monocrystalline with a monoclinic structure and large aspect ratio compared to CuO nanospheres. The experimental data show that the thermal conductivity of the nanofluids increases with the volume fraction of CuO nanowires or nanospheres, with a nearly linear relationship. For the nanofluid with the addition of 0.75 vol.% CuO nanowires, the thermal conductivity enhancement is up to 60.78%, which is much higher than that with spherical CuO nanoparticles. The nanofluids exhibit typical Newtonian behavior, and the measured viscosity of CuO nanowires contained nanofluids were found only 6.41% increment at the volume fraction of 0.75%. It is attractive in enhanced heat transfer for application. The thermal conductivity and viscosity of CuO nanofluids were further calculated and discussed by comparing our experimental results with the classic theoretical models. The mechanisms of thermal conductivity and viscosity about nanofluids were also discussed in detail.

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Section: Resultsmentioning

confidence: 95%

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Zhu

Wang

et al. 2018

Sci Rep

134

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“…Eq. (11) given by Meybodi et al [63] cannot be described at this point, since the paper by Wang cited in the contribution addresses thermal conductivity and hence must be a mistake. Chen et al [66] used experimental values and fitted a regression curve that gave Eq.…”

Section: Viscositymentioning

confidence: 97%

“…5. Meybodi et al [63] used a huge number of measured values from literature for the viscosity of Al 2 O 3 , TiO 2 , SiO 2 and CuO nanofluids to fit a 7 parameter regression curve.…”

Section: Viscositymentioning

confidence: 99%

“…But even such a massive regression curve as used by Meybody et al [63] neither includes particle shape, pH-value or pressure nor the shear rate. Particle size is incorporated in the fitted parameters and thus will deviate for smaller or larger particles than the range, the parameters in the correlation were fitted for.…”

Section: Viscositymentioning

confidence: 99%

“…Meybodi et al[63] fitted an equation to numerous measured values from literature and compare this equation with several known correlations for the effective viscosity of nanofluids.…”

mentioning

confidence: 99%

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Nanofluids revisited

Eggers

Kabelac

2016

Applied Thermal Engineering

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h i g h l i g h t s Thermophysical properties bring nanofluids into various engineering applications. Quantity of variable parameters hinder comprehensive equations, e.g. for viscosity. Coordinated research can help to overcome debates about thermophysical properties. Missing experience for nanofluids in large scale plants. Lack of studies about high pressure/temperature applications and long term behavior. a b s t r a c tIn the roughly two decades from the first publication until today, nanofluids have found their way into various research fields. To-date published documents range from basic research to high-tech applications. This contribution aims at outlining current fields of research regarding nanofluid research. These range from fundamental property data studies presented in the first section to a listing of numerous applications of different fields of engineering. It is shown that nanofluid science pushes increasingly into the scientific world providing plenty of new questions and challenges.

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Experimental investigation of thermophysical properties of R718 based nanofluids at low temperatures

2019

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A novel correlation approach for viscosity prediction of water based nanofluids of Al 2 O 3 , TiO 2 , SiO 2 and CuO

Cited by 56 publications

References 26 publications

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Nanofluids revisited

Experimental investigation of thermophysical properties of R718 based nanofluids at low temperatures

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