An overview on synthesis, stability, opportunities and challenges of nanofluids

Urmi, Wajiha Tasnim; Rahman, Md. Mustafizur; Kadirgama, K.; Maleque, Md. Abdul

doi:10.1016/j.matpr.2020.10.998

Cited by 33 publications

(23 citation statements)

References 95 publications

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“…In addition, the surfactant also influences the interfacial region between particle and the fluid, forming a stable composite mixture. The surfactants such as cetyl trimethyl ammonium bromide (CTAB), sodium dodecyl benzene sulfonate (SDBS), oleic acid and Span-80 involving both ionic and non-ionic structures are used for improving the stability of nanofluids [11,12].…”

Section: Introductionmentioning

confidence: 99%

Impact of Surfactants on the Electrical and Rheological Aspects of Silica Based Synthetic Ester Nanofluids

et al. 2022

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This study reports experimental investigations of the effects of different surfactants (CTAB, Oleic acid and Span 80) on silica based synthetic ester nanofluids. The positive and negative potential observed for the ionic (CTAB) and non-ionic surfactant (Span 80) from zeta potential analysis indicates an improved stability. The optimization of nanofillers and surfactants is performed considering the corona inception voltage measured using ultra high frequency (UHF) technique and fluorescent fiber. Rheological analysis shows no significant variation of properties with shear rate, implying Newtonian behavior even with the addition of surfactant. In addition, the permittivity of the nanofluid is not much affected by adding surfactant but a marginal variation is noticed in the loss tangent with the effect of temperature. The fluorescence spectroscopy shows no change in the emission wavelength with the addition of silica nanofiller and surfactants. Flow electrification studies indicate an increase in the streaming current with the rotation speed and temperature, with a higher current magnitude observed in the case of nanofluids.

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Section: Introductionmentioning

confidence: 99%

Impact of Surfactants on the Electrical and Rheological Aspects of Silica Based Synthetic Ester Nanofluids

et al. 2022

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“…Moreover, as the temperature of the suspension increases during ultrasonication processes, the nanofluid concentration may be changed due to fluid vaporization, thus affecting their properties. All these issues must be considered in future nanofluid research [221].…”

Section: Conventional Nanofluidsmentioning

confidence: 99%

Hybrid Nanofluids—Next-Generation Fluids for Spray-Cooling-Based Thermal Management of High-Heat-Flux Devices

Asim

Siddiqui

2022

Nanomaterials

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In recent years, technical advancements in high-heat-flux devices (such as high power density and increased output performance) have led to immense heat dissipation levels that may not be addressed by traditional thermal fluids. High-heat-flux devices generally dissipate heat in a range of 100–1000 W/cm2 and are used in various applications, such as data centers, electric vehicles, microelectronics, X-ray machines, super-computers, avionics, rocket nozzles and laser diodes. Despite several benefits offered by efficient spray-cooling systems, such as uniform cooling, no hotspot formation, low thermal contact resistance and high heat transfer rates, they may not fully address heat dissipation challenges in modern high-heat-flux devices due to the limited cooling capacity of existing thermal fluids (such as water and dielectric fluids). Therefore, in this review, a detailed perspective is presented on fundamental hydrothermal properties, along with the heat and mass transfer characteristics of the next-generation thermal fluid, that is, the hybrid nanofluid. At the end of this review, the spray-cooling potential of the hybrid nanofluid for thermal management of high-heat-flux devices is presented.

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“…MQL significantly increased tool life, reduce torque and thrust force while using nanodiamond-based nanofluid (NF) [24]. Shen et al, [25] found that the MQL method with MoS2 nanoparticles reduces force and friction because the inclusion of nanoparticles shows significant improvement of thermal conductivity, which plays a role in better heat transfer into the cutting zone during machining [26][27][28]. MQL with Al2O3 and diamond nanofluids reduce the machined surface forces and roughness and prevent burning the workpiece using water as a base liquid [29].…”

Section: Mechanism Of Mql Systemmentioning

confidence: 99%

Effects of Minimum Quantity Lubrication Technique in Different Machining Processes - A Comprehensive Review

Urmi

Rahman

Safiei

et al. 2022

ARFMTS

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The cooling condition has a significant effect in the metal cutting industry, which has a crucial role in cooling and lubricating the workpiece-tool interface, reducing friction, and removing chips from the cutting area. Almost 15-20% of the overall machining cost was incurred from cooling and lubrication. So, the considerable cost can be occurred due to the supply, preparation, and disposal of cooling lubricants. Moreover, exposure to these substances can pollute the environment and hamper operators' health. Therefore, of late, researchers have been giving priority to investigate the effects of the Minimum Quantity Lubrication (MQL) techniques in machining as it alleviates the coolant usage by splashing fluid and compressed air mixtures. In this lubrication technique, the maximum fluid flow is less than 50ml/h, whereas flooded cooling technology uses up to 12,000 litres per hour. Most researchers found that a lower coefficient of friction, better surface finish, reduced cutting forces, and torques can be obtained using the MQL method in an optimized manner compared to dry and wet machining. Moreover, besides improving machinability characteristics, the MQL technique also complies with green and sustainable machining. Thus, a prospective solution to dry and wet processing. This paper represents the brief discussion and mechanism of the MQL technique and the effects of the MQL technique on the performance parameters of different machining processes.

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An overview on synthesis, stability, opportunities and challenges of nanofluids

Cited by 33 publications

References 95 publications

Impact of Surfactants on the Electrical and Rheological Aspects of Silica Based Synthetic Ester Nanofluids

Impact of Surfactants on the Electrical and Rheological Aspects of Silica Based Synthetic Ester Nanofluids

Hybrid Nanofluids—Next-Generation Fluids for Spray-Cooling-Based Thermal Management of High-Heat-Flux Devices

Effects of Minimum Quantity Lubrication Technique in Different Machining Processes - A Comprehensive Review

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