Viscosity-prediction models of ammonia water nanofluids based on various dispersion types

Yang, Linjun; Du, Kai; Ding, Yue; Cheng, Bo; Li, Yan Jun

doi:10.1016/j.powtec.2011.09.050

Cited by 35 publications

(8 citation statements)

References 18 publications

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“…Together with the thermal conductivity, viscosity also plays a key role in nanofluids. It is well known that in the thermal engineering systems, the pumping power is proportional to the pressure drop, which is dependent on the viscosity of the nanofluids 46 . Yang et al 47 claimed that the main parameters that affect the viscosity of nanofluids are the variety and concentration of surfactants, the interaction between surfactant and nanoparticles, and the dispersion type.…”

Section: Resultsmentioning

confidence: 99%

Experimental study on the effect of different surfactants on the thermophysical properties of graphene filled nanofluids

Qiao

Wen

et al. 2021

Int J Energy Res

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Summary In this study, the effects of different surfactants on the stability and thermophysical properties of graphene (GR) filled water (W) nanofluids were investigated in an experimental manner. Nanofluids filled by 0.05% mass fraction of GR nanoparticles with a surfactant concentration of 0.02%, 0.04%, 0.06%, 0.08%, and 0.1% were studied. The effects of surfactants on stability, viscosity, and thermophysical properties of prepared nanofluids were analyzed experimentally. The results show that the nonionic surfactants displayed best performance in terms of static stability, and the anionic surfactants stand in the second position. Further study reveals that thermal conductivity enhancement of nanofluids could reach 2.0% by filling only 0.05% mass fraction of GR and the heat transfer coefficient of nanofluids up to 27%.

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Section: Resultsmentioning

confidence: 99%

Experimental study on the effect of different surfactants on the thermophysical properties of graphene filled nanofluids

Qiao

Wen

et al. 2021

Int J Energy Res

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“…The properties of nanoparticles are listed in Table 1. To avoid the influence of particle size [27, 28] and dispersant [21, 29] on the viscosity of nanofluids, nanoparticles used to prepare TiO 2 –Ag/engine oil, Al 2 O 3 –Ag/engine oil hybrid nanofluids had the same diameter of 20 nm and no dispersant was used in present experiments.…”

Section: Methodsmentioning

confidence: 99%

Experimental investigation on the viscosity of hybrid nanofluids made of two kinds of nanoparticles mixed in engine oil

Liu

Yin

Tian

et al. 2018

Micro & Nano Letters

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To investigate the viscosity of hybrid nanofluids containing two kinds of nanoparticles, a series of experiments are conducted on TiO 2-Ag/ engine oil, Al 2 O 3-Ag/engine oil (a mixture of the volume ratio of 50:50) nanofluids under different shear rates and volume fractions. The results show that the viscosity decreases with increasing shear rate, which suggests TiO 2-Ag/engine oil and Al 2 O 3-Ag/engine oil hybrid nanofluids are both shear thinning fluids, whilst the viscosity of all samples enhances with the increase of volume fraction. Moreover, an interesting result is observed that the hybrid nanofluids have a lower viscosity than single particle nanofluids. Also, through the validating experiment based on Al 2 O 3-Al 2 O 3 /engine oil with different diameters, it shows that different materials with unlike morphologies mixture are more likely to reduce the viscosity than dissimilar nanoparticles mixture of just one material.

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“…It then becomes a major factor responsible for drop in natural convective heat transfer of nanofluids [54]. Conventional models and experimental values are usually used in predicting the dynamic viscosity of nanofluids [55][56][57][58][59]. Most early studies used suspensions of millimeter or micrometer-sized particles, which led to countless problems, such as a tendency to rapidly sediment, unless flow rate is increased; not only losing the improvements in thermal conductivity, but also forming sludge sediments, increasing the thermal resistance and impairing the heat transfer capacity of the conventional fluids.…”

Section: B Viscosity Property Of Nanofluidsmentioning

confidence: 99%

Mono Nanofluids: Review on Current Status, Challenges and Future Prospects

C¹,

Ndaliman²,

Ezedimbu³

et al. 2021

IJRIAS

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Advancement in the area of technology, industrial application demands effective, efficient and successful heat transfer application. Nanofluids are proven potential heat transfer fluids with heighten thermo physical properties and heat transfer performance. In this paper, a comprehensive review on the current status, applications and challenges associated with the use of nanofluids have been evaluated and presented in the study. Authors also critically examined and identified research gaps for further research directions. The comprehensive study and assessment are essential to be carried out to ensure maxima utilization of nanofluid as new and potential heat transfer fluid.

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Viscosity-prediction models of ammonia water nanofluids based on various dispersion types

Cited by 35 publications

References 18 publications

Experimental study on the effect of different surfactants on the thermophysical properties of graphene filled nanofluids

Experimental study on the effect of different surfactants on the thermophysical properties of graphene filled nanofluids

Experimental investigation on the viscosity of hybrid nanofluids made of two kinds of nanoparticles mixed in engine oil

Mono Nanofluids: Review on Current Status, Challenges and Future Prospects

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