A comprehensive review on synthesis, stability, thermophysical properties, and characterization of nanofluids

Sezer, Nurettin; Atieh, Muataz Ali; Koç, Muammer

doi:10.1016/j.powtec.2018.12.016

Cited by 270 publications

(77 citation statements)

References 192 publications

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“…Huminic et al (2015) explained the effect of nanoparticle concentration on thermal conductivity, and they stated that the interaction between molecules increases with an increase in particle concentration, resulting in enhanced thermal conductivity (Huminic et al 2015). Besides, higher concentrations of nanoparticles lead to the appearance of some suspensions, which minimised the stability of the nanofluids, and lower concentrations make it unappealing as an EOR agent (Sezer et al 2019). Further, Masoud Hosseini et al (2016) investigated the effect of nanoparticle concentration on the rheological behaviour of liquid paraffin, and their results demonstrated that the viscosity of the nanofluids increased with an increase in nanoparticle concentration (Masoud Hosseini et al 2016).…”

Section: Nanoparticle Concentrationmentioning

confidence: 99%

The effect of nanoparticles on reservoir wettability alteration: a critical review

2020

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A novel concept of treating oil reservoirs by nanofluids is being developed to improve oil recovery and reduce the trapped oil in hydrocarbon reservoirs. Nanoparticles show great potential in enhancing oil recovery under ambient conditions. In this paper, the approaches of wettability alteration by using nanofluid, stability of nanofluids, and the most reliable wettability alteration mechanisms associated with variant types of nanoparticles have been reviewed. Moreover, the parameters that have a significant influence on nanofluid flooding have been discussed. Finally, the recent studies of the effect of nanoparticles on wettability alteration have been summarised and analysed. Furthermore, this paper presents possible opportunities and challenges regarding wettability alteration using nanofluids.

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Section: Nanoparticle Concentrationmentioning

confidence: 99%

The effect of nanoparticles on reservoir wettability alteration: a critical review

2020

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“…Eastman et al [30] experimentally investigated the CuO nanofluid and reported a conductivity ratio of 1.1 for the volume fraction of 0.01. Meanwhile, Sezer et al [31] and Khan et al [17] reviewed the studies about the thermophysical properties of CuO-based nanofluids. The maximum discrepancy between the results of these studies and the present study is less than 5%, which also validated the reasonability of the present results.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Numerical Investigation of the Effect of Nanoparticle Diameter and Sphericity on the Thermal Performance of Geothermal Heat Exchanger Using Nanofluid as Heat Transfer Fluid

Jiang

Wang

2020

Energies

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The geothermal heat exchanger system is one of the most energy-efficient and environmentally friendly building service systems. In the present study, CuO/water nanofluid was used as the heat transfer fluid to enhance the energy efficiency of the geothermal heat exchangers. A three-dimensional numerical model was employed to investigate the effect of nanoparticle diameter and sphericity on the thermal performance of the geothermal heat exchanger, and it was well validated against the experimental results of nanofluids in the geothermal heat exchangers. The numerical results showed that nanoparticles with a diameter of 5 nm and 50 nm were not recommended for the nanofluids used in the geothermal heat exchangers due to the performance efficiency coefficient lower than 1, and the optimum diameter was 40 nm, which had the highest performance efficiency coefficient (1.004875). Moreover, the spherical particle-based nanofluid was characterized by the 8.55% higher energy efficiency, in comparison to rod-shaped particle-based nanofluid. Therefore, the application of nanofluid in the geothermal heat exchanger can enhance heat transfer, and the proposed optimum particle diameter and sphericity could contribute to higher energy efficiency.

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“…However, no long-term stability has been reported in the literature. Therefore, it is of great signi cance to further study and apply various technologies to prepare nanolubricants with long-term dispersion stability [53]. Hence, this paper aims to investigate the stability of Al 2 O 3 nanoparticles in base oil.…”

Section: Days 21 Daysmentioning

confidence: 99%

Effect of Mixing Temperature, Ultrasonication Duration and Nanoparticles/Surfactant Concentration on the Dispersion Performance of Al2O3 Nanolubricants

Liu¹,

Hou²,

Li³

et al. 2020

Preprint

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The main goal of this study is to improve the dispersion stability of Al2O3 nanoparticles in polyalphaolefin oil to overcome the sedimentation problem of nanoparticles using the addition of oleic acid as a surfactant. This work investigates the effect of the settling time, temperature, ultrasonic duration and nanoparticles/surfactant (oleic acid) concentration on the dispersion stability of Al2O3 nanoparticles in oil-based solutions. Herein, the visual observation, UV–Vis spectroscopy, dynamic light scattering (DLS) analysis, and transmission electron microscopy (TEM) images were used to evaluate the dispersion stability of the Al2O3 nanoparticles. The results reveal that the thermal method during the synthesis of nanofluids using 50 °C temperature improves the dispersion of nanoparticles. The results also exhibited that increasing the ultrasonic amplitude and prolonging the ultrasonic time during the synthesis of nanofluids influences the dispersion stability. The results showed that the nanolubricant with 0.8 wt.% oleic acid provides better dispersion behavior. Furthermore, the nanolubricants containing 0.005wt% and 0.01wt% Al2O3 nanoparticles demonstrated outstanding dispersion performance, and the stability time reached more than 160 days.

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A comprehensive review on synthesis, stability, thermophysical properties, and characterization of nanofluids

Cited by 270 publications

References 192 publications

The effect of nanoparticles on reservoir wettability alteration: a critical review

The effect of nanoparticles on reservoir wettability alteration: a critical review

Numerical Investigation of the Effect of Nanoparticle Diameter and Sphericity on the Thermal Performance of Geothermal Heat Exchanger Using Nanofluid as Heat Transfer Fluid

Effect of Mixing Temperature, Ultrasonication Duration and Nanoparticles/Surfactant Concentration on the Dispersion Performance of Al2O3 Nanolubricants

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