Viscosity of nanofluids: particle shape and fractal aggregates

Gaganpreet,; Srivastava, Sunita

doi:10.1080/00319104.2014.956169

Cited by 18 publications

(8 citation statements)

References 42 publications

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“…Aggregation also plays an important role on the viscosity of nanofluids [30]. Gaganpreet et al [31] focused on fractal aggregates and interfacial layer around the nanoparticle to determine the rheological behavior of nanofluids. It was found that the increase in effective radius of the aggregates lead to a substantial viscosity increment.…”

Section: Introductionmentioning

confidence: 99%

Effect of particle size on the viscosity of nanofluids: A review

Koca

Doğanay

Turgut

et al. 2018

Renewable and Sustainable Energy Reviews

202

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Nanofluids are potential new generation heat transfer fluids, which have been investigated meticulously, in recent years. Thermophysical properties of these fluids have significant influence on their heat transfer characteristics. Viscosity is one of the most important thermophysical properties that depends on various parameters. Size of the particles used in nanofluids is one of these effecting parameters. In this work, experimental studies considering the particle size effect on the viscosity of the nanofluid have been reviewed. Firstly, comparison of nanofluid and surfactant type, production and measurement methods were considered. Viscosity results of selected studies were evaluated in view of the parameters such as particle size, temperature and concentration. Furthermore, effective viscosity models of nanofluids, which include particle size as a parameter were discussed. The results indicate that there is a discrepancy about the effect of particle size on the viscosity of nanofluids. Moreover, it is observed from the evaluated data that the relative viscosity variation can be almost 40% either upwards or downwards by only altering the particle size.

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Section: Introductionmentioning

confidence: 99%

Effect of particle size on the viscosity of nanofluids: A review

Koca

Doğanay

Turgut

et al. 2018

Renewable and Sustainable Energy Reviews

202

View full text Add to dashboard Cite

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“…Here, ν N = μ N / ρ N . The relation between the viscosity of the nanofluid μ N and base fluid μ F can be expressed as (Gaganpreet and Srivastava 23 )…”

Section: Modeling Of the Problemmentioning

confidence: 99%

“…21 Hayat et al 22 took Newtonian fluid/non-Newtonian fluid as a base fluid to make nanofluids and studied the peristaltic transport of these nanofluids. Gaganpreet and Srivastava 23 analyzed Krieger and Dougherty's model and established the viscosity relation for nanofluids. Ahuja and Girotra 24 studied RTI in nanofluids numerically as well as analytically.…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of water-alumina nanofluid film at the spherical interface

Agarwal

Awasthi

Shukla

2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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The interface of a viscous fluid and [Formula: see text]-water nanofluid is analyzed through linear instability analysis in a spherical configuration. The viscous fluid lies inside the sphere while the outside region contains nanofluid. In this model, the viscosity of the nanofluid is considered a function of the base fluid viscosity, nanoparticles volume fraction, fractal aggregates, and nanoparticles shape. The perturbed flow is taken as irrotational, and the linear perturbation equations are solved through viscous irrotational theory. The perturbations growth rate can be computed through a 2-degree polynomial and the coefficients of this polynomial are the functions of the Atwood number, Richardson number, Weber number, Reynolds number, etc. The nanofluid interface is found more stable than the viscous fluid interface. The density of nanofluids raises the amplitude of disturbances while the nanofluid's viscosity has a reverse effect.

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“…Following above mentioned works on the effects of aggregation and its kinetics on thermal conductivity [28,115], Prasher et al [125] further developed a three-level homogenization theory to evaluate the effective thermal conductivity of colloids containing fractal clusters. In other aspect, Gaganpreet and Srivastava [128] theoretically studied the viscosity of oxide nanoparticle dispersions based of fractals of irregular structure of aggregation, and they used prolate ellipsoid aggregation to study the viscosity of nanofluids.…”

Section: Fractal Aggregation Of Nanoparticlesmentioning

confidence: 99%

Recent developments on fractal-based approaches to nanofluids and nanoparticle aggregation

Cai

Xiao

et al. 2017

International Journal of Heat and Mass Transfer

158

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The properties of nanoparticles and its aggregation as well as convective heat transfer of nanofluids have received great attentions over the last few decades. It is well certified that nanoparticles and its aggregation can be successfully described by fractal geometry theory and technology. In this review, the fractal properties of nanoparticle and its aggregation are firstly introduced, and then the recent investigations on the fractal models and fractal-based approaches that applied for effective thermal conductivity, convective heat transfer, critical heat flux and subcooled pool boiling of nanofluids, fractal clusters and yield stress property of nanoparticle aggregation are summarized.

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Viscosity of nanofluids: particle shape and fractal aggregates

Cited by 18 publications

References 42 publications

Effect of particle size on the viscosity of nanofluids: A review

Effect of particle size on the viscosity of nanofluids: A review

Stability analysis of water-alumina nanofluid film at the spherical interface

Recent developments on fractal-based approaches to nanofluids and nanoparticle aggregation

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