Effect of the non-electrically conductive spindle on the viscosity measurements of nanofluids subjected to the magnetic field

Ajith, K. M.; Pillai, Archana Sumohan; Enoch, Israel V.M.V.; Sharifpur, Mohsen; Solomon, A. Brusly; Meyer, Josua P.

doi:10.1016/j.colsurfa.2021.127252

Cited by 10 publications

(2 citation statements)

References 39 publications

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“…Nanoparticles refer to particles smaller than 100 nm in some one dimension, which yield important scientific research value due to their special physical properties [ 1 , 2 ]; whereas quantum dots are even smaller in size, generally below 10 nm [ 3 ], and nanofluids are defined as dispersed systems formed by a suspension of nanoparticles in a base fluid [ 4 ]. Nanofluids give rise to potential applications in various fields of industry, including solar collectors [ 5 , 6 ], lubrication [ 7 , 8 ], and oil recovery [ 9 , 10 , 11 ], due to the enhancement of various properties, such as thermal conductivity [ 12 , 13 ], electrical conductivity [ 14 , 15 ], and viscosity [ 16 , 17 ]. In fact, such nanoparticle suspension systems are also common in nature, such as raindrops on oil-stained pavements, and we can observe the interaction of such complex liquid systems with solid surfaces.…”

Section: Introductionmentioning

confidence: 99%

Copper Quantum Dot/Polyacrylamide Composite Nanospheres: Spreading on Quartz Flake Surfaces and Displacing Crude Oil in Microchannel Chips

Ma,

Yang,

Liu

et al. 2024

Polymers

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Polyacrylamide, silica, and other nanoparticles have all been realized in the field of enhanced oil recovery. Researchers often explore the mechanisms of spreading behavior and simulated displacement to develop more efficient types of nanoparticles. In this study, copper quantum dots were introduced into a acrylamide copolymerization system to obtain composite nanospheres and its structure, topographic, and application performance were characterized. The results show that the composite nanospheres have a particle size of around 25 nm, are uniformly loaded with copper particles, and have good temperature resistance. The spreading ability on the quartz flake surfaces and displacement effect in microchannels of composite nanospheres, acrylamide copolymer nanospheres, and copper quantum dots were compared by nanofluid spreading experiments and microchannel chip oil displacement experiments. The results indicate that the composite nanospheres can effectively reduce the water contact angle, promote the spreading of aqueous phase, and accelerate the oil droplet removal process; the accelerating effect is stronger than other samples. Its oil displacement effect is also the strongest, and it is minimized by the influence of channel size, temperature, and dispersing medium, with better stratigraphic adaptability. This work supports the practical application of copper quantum dot/polyacrylamide composite nanospheres in the oilfield.

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Section: Introductionmentioning

confidence: 99%

Copper Quantum Dot/Polyacrylamide Composite Nanospheres: Spreading on Quartz Flake Surfaces and Displacing Crude Oil in Microchannel Chips

Ma,

Yang,

Liu

et al. 2024

Polymers

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“…Further, it was reported that the density of MgFe2O4 FF was low compared to other FFs and was reduced by the influence of MF. It was pointed out that the rise in the viscosity of MgFe2O4 FF by the influence of MF was low related to that of other FFs (Doganay et al 2019;Ajith et al 2021). These features of MgFe2O4 FF led to the analysis of its feasibility in magnetohydrodynamic natural convection heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Turbulent magnetohydrodynamic natural convection in a heat pipe-assisted cavity using disk-shaped magnesium ferrite nanoparticles

et al. 2022

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The prospect to alter the thermophysical properties of ferrofluid with an influence of magnetic field leads to improving natural convection in various heat transfer systems. This investigation principally focuses on the studies of electromagnetism-based turbulent natural convection heat transfer of lowdensity disk-shaped magnesium ferrite /water-based ferrofluid, filled in a novel heat pipe-assisted cubical cavity at various volume fractions. Two flat plate heat pipes were used to maintain temperature differences in the cavity. To advance the buoyancy of working fluid inside the cavity, deliberately lowdensity ferrofluid containing disk-shaped particles were formulated using the hydrothermal method. The temperature difference between the two-heat pipe-assisted vertical walls were sustained with four distinct temperature ranges from 10 to 25 o C. The ferrofluid filled in the cavity was then subjected to magnetic field ranging from 0 to 350 Gauss to understand the thermomagnetic convection effects on heat transfer. The optimal volume fraction of ferrofluid for maximum heat transfer was found to be 0.05% at a wall temperature difference of 25 o C, owing to 23.51% improvement in average heat transfer coefficient along with 33.37% improvement in average Nusselt number when compared to water. With the application of a magnetic field of 350 Gauss, the average heat transfer coefficient was further enhanced by 10.11%, and the average Nusselt number improved by 6.28% for 0.05% volume fraction in comparison to the condition where no magnetic field was applied.

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Nanofluids for heat transfer augmentation

Ajith

Solomon

Sharifpur

2023

Materials for Advanced Heat Transfer Systems

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Effect of the non-electrically conductive spindle on the viscosity measurements of nanofluids subjected to the magnetic field

Cited by 10 publications

References 39 publications

Copper Quantum Dot/Polyacrylamide Composite Nanospheres: Spreading on Quartz Flake Surfaces and Displacing Crude Oil in Microchannel Chips

Copper Quantum Dot/Polyacrylamide Composite Nanospheres: Spreading on Quartz Flake Surfaces and Displacing Crude Oil in Microchannel Chips

Turbulent magnetohydrodynamic natural convection in a heat pipe-assisted cavity using disk-shaped magnesium ferrite nanoparticles

Nanofluids for heat transfer augmentation

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