Investigation of viscosity and thermal conductivity of alumina nanofluids with addition of SDBS

LotfizadehDehkordi, Babak; Kazi, S. N.; Hamdi, M.; Ghadimi, Azadeh; Sadeghinezhad, Emad; Metselaar, Hendrik Simon Cornelis

doi:10.1007/s00231-013-1153-8

Cited by 74 publications

(15 citation statements)

References 35 publications

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“…THW technique is used with KD2 probe device since it is a very common methodology to evaluate fluids thermal conductivity, and it is easy to apply. While results obtained with it are more reliable at room and lower temperatures, some authors confirmed accurate results were obtained also at higher temperatures (up to 323K) (Das, Putra, Thiesen, Vol.14, No.1 (2019) and Roetzel, 2003;LotfizadehDehkordi et al, 2013;Jaime Taha-Tijerina et al, 2012;Yang and Han, 2006). According to our experiments, thermal conductivity above 333K have low reproducibility and very high variation, due to unstable fluid, i.e.…”

Section: Resultssupporting

confidence: 80%

Thermo-physical evaluation of dielectric mineral oil-based nitride and oxide nanofluids for thermal transport applications

Taha‐Tijerina

Peña

Cué-Sampedro

et al. 2019

JTST

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The thermal, physical and morphological characteristics of dielectric insulating oil-based nanofluids were investigated. The nanofluids were produced by the two-step method, homogeneously dispersing AlN and TiO 2 nanoparticles within insulating mineral oil (MO). The filler fraction of the nanofluids were 0.01, 0.10 and 0.50wt.%. Thermo-physical properties such as thermal conductivity and viscosity were measured. A comparison of two produced nanofluids: non-modified surface nanoparticles, and modified nanoparticles with oleic acid (OA) is presented and shown to improve stability while preserving thermal properties.

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Section: Resultssupporting

confidence: 80%

Thermo-physical evaluation of dielectric mineral oil-based nitride and oxide nanofluids for thermal transport applications

Taha‐Tijerina

Peña

Cué-Sampedro

et al. 2019

JTST

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“…The conventional methods for heat transfer in many systems are using fluids such as water, ethylene glycol and mineral oils. However, the thermal efficiency of these flow systems is hampered by the low heat transfer performance due to the low thermal conductivity of base fluids [1-3]. Nanofluids have been shown to have excellent thermal properties (in particular, thermal conductivity and convective heat transfer coefficient) compared to simple base fluids [2,4-13].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on thermal conductivity and viscosity of nanofluids containing carbon nanotubes

et al. 2014

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Recently, there has been considerable interest in the use of nanofluids for enhancing thermal performance. It has been shown that carbon nanotubes (CNTs) are capable of enhancing the thermal performance of conventional working liquids. Although much work has been devoted on the impact of CNT concentrations on the thermo-physical properties of nanofluids, the effects of preparation methods on the stability, thermal conductivity and viscosity of CNT suspensions are not well understood. This study is focused on providing experimental data on the effects of ultrasonication, temperature and surfactant on the thermo-physical properties of multi-walled carbon nanotube (MWCNT) nanofluids. Three types of surfactants were used in the experiments, namely, gum arabic (GA), sodium dodecylbenzene sulfonate (SDBS) and sodium dodecyl sulfate (SDS). The thermal conductivity and viscosity of the nanofluid suspensions were measured at various temperatures. The results showed that the use of GA in the nanofluid leads to superior thermal conductivity compared to the use of SDBS and SDS. With distilled water as the base liquid, the samples were prepared with 0.5 wt.% MWCNTs and 0.25% GA and sonicated at various times. The results showed that the sonication time influences the thermal conductivity, viscosity and dispersion of nanofluids. The thermal conductivity of nanofluids was typically enhanced with an increase in temperature and sonication time. In the present study, the maximum thermal conductivity enhancement was found to be 22.31% (the ratio of 1.22) at temperature of 45°C and sonication time of 40 min. The viscosity of nanofluids exhibited non-Newtonian shear-thinning behaviour. It was found that the viscosity of MWCNT nanofluids increases to a maximum value at a sonication time of 7 min and subsequently decreases with a further increase in sonication time. The presented data clearly indicated that the viscosity and thermal conductivity of nanofluids are influenced by the sonication time. Image analysis was carried out using TEM in order to observe the dispersion characteristics of all samples. The findings revealed that the CNT agglomerates breakup with increasing sonication time. At high sonication times, all agglomerates disappear and the CNTs are fragmented and their mean length decreases.

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“…The thermal conductivity of nanofluids increases with increasing temperature and laser ablation process time. This indicates the influence of Ag nanostructures on thermal conductivity [51][52][53], and demonstrates the influence of Brownian motion in the thermal transport behavior [54,55]. Figure 4 shows a comparison of the p oz of various vegetable nanosystems.…”

Section: Tribological Performancementioning

confidence: 86%

Tribological and Thermal Transport of Ag-Vegetable Nanofluids Prepared by Laser Ablation

et al. 2020

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Lubricants and fluids are critical for metal-mechanic manufacturing operations as they reduce the friction and wear of tooling and components, and serve as coolants to dissipate the heat generated in these operations. The proper application of these materials improves machine operative life and tooling, and decreases cost, energy, and time consumption for maintenance, damage, repairs, or the need to exchange pieces/components within the machinery. Natural or vegetable-based lubricants have emerged as a substitute for mineral oils, which harm the environment due to their low biodegradability and have negative effects on human health (e.g., causing skin/respiratory diseases). Thus, finding biocompatible and efficient lubricants has become a technology objective for researchers and industry. This study evaluates soybean-, corn-, and sunflower-based lubricants reinforced with silver (Ag) nanostructures by a pulsed laser ablation process. Thermal and tribological evaluations were performed with varying Ag contents, and temperature-dependent behavior was observed. Thermal conductivity improvements were observed for all nanofluids as the temperature and Ag concentration increased (between 15% and 24%). A maximum improvement of 24% at 50 °C and 10 min exposure time of the pulsed laser ablation process for soybean oil was observed. The tribological evaluations showed improvements in the load-carrying capacity of the vegetable oils, i.e., an increase from 6% to 24% compared to conventional materials. The coefficient of friction performance also showed enhancements with Ag concentrations between 4% and 15%.

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Investigation of viscosity and thermal conductivity of alumina nanofluids with addition of SDBS

Cited by 74 publications

References 35 publications

Thermo-physical evaluation of dielectric mineral oil-based nitride and oxide nanofluids for thermal transport applications

Thermo-physical evaluation of dielectric mineral oil-based nitride and oxide nanofluids for thermal transport applications

An experimental study on thermal conductivity and viscosity of nanofluids containing carbon nanotubes

Tribological and Thermal Transport of Ag-Vegetable Nanofluids Prepared by Laser Ablation

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