Effect of suspending hybrid nano-additives on rheological behavior of engine oil and pumping power

Dardan, Ebrahim; Afrand, Masoud; Isfahani, Amir Homayoon Meghdadi

doi:10.1016/j.applthermaleng.2016.08.103

Cited by 185 publications

(34 citation statements)

References 41 publications

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“…Similarly, water based Al2O3 and CuO nanofluids also shows the same trend when the temperature is raised from 21 °C to 75 °C [106]. This is because a weakening of inter-molecular forces and inter-particle forces between the molecules at higher temperature [77]. Effect of temperature on viscosity of different nanofluid have shown in Table 7.…”

Section: Effect Of Temperaturesupporting

confidence: 53%

“…The viscosity increased with concentration because bigger nano-clusters form due to the van der Waals forces between nanoparticles and base fluids. Furthermore, the viscosity decreased with temperature due to the intermolecular interactions between the molecules become feeble [77]. Sunder et al (2014) proved viscosity for MWCNT-FE3O4 hybrid nanofluid increased (0.3%) 1.27 times and 1.5 times compared to base fluid at different temperatures (20°C to 60°C) [78].…”

Section: Viscositymentioning

confidence: 99%

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A review on thermo-physical properties of bio, non-bio and hybrid nanofluids

Chen¹,

Oumer²,

Aziz³

2019

JMES

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The pressure drop and thermal performance of various nanofluids can be affected by their thermo-physical properties. However, there are many different parameters that need to be considered when determining the thermo-physical properties of nanofluids. This paper highlights a detail reviews on the thermo-physical properties of nanofluids with different material type and effect of some process parameters (such as material type, temperature and concentration) on the thermo-physical properties of nanofluids. Four thermo-physical properties mainly density, viscosity, thermal conductivity and specific heat capacity from different literatures were summarized, discussed and presented. The lowest viscosity value of nanofluids in literature was mango bark water-based nanofluid (0.81cP). On the other hand, the maximum thermal conductivity value of nanofluids in the literature was GNP-Ag water-based nanofluid (0.69W/mK). The density and specific heat capacity are strongly dependent on the material type. Meanwhile, the viscosity and thermal conductivity are greatly affected by temperature and concentration. The most influential parameters on thermo-physical properties of nanofluids are material type followed by temperature. Most of the literatures confirmed bio nanofluids have low viscosity value and hybrid have high thermal conductivity values.

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Section: Effect Of Temperaturesupporting

confidence: 53%

Section: Viscositymentioning

confidence: 99%

A review on thermo-physical properties of bio, non-bio and hybrid nanofluids

Chen¹,

Oumer²,

Aziz³

2019

JMES

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“…Adding the solid nanoparticles into the fluids is one of the ways for increasing the heat transfer rate. In spite of the fact that by adding the solid nanoparticles to the fluids, the thermal conductivity of the fluid increases, it also increases the viscosity of the fluid [9][10][11][12][13][14][15][16][17][18]. In the natural convection flow, increasing the fluid viscosity leads to the decrease of the fluid flow; thus, it has a negative effect on the heat transfer rate.…”

Section: Introductionmentioning

confidence: 92%

Mixed convection in a rotating eccentric annulus containing nanofluid using bi-orthogonal grid types: A finite volume simulation

Teimouri

Sheikhzadeh

Afrand

et al. 2017

Journal of Molecular Liquids

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“…The physical properties of CuO and Diphyl DT are shown in Table 1. The mass of CuO nanoparticles required to achieve a given percentage of volume concentration in the nanofluids was estimated from Equation (1) [35]:…”

Section: Nanofluids Preparationmentioning

confidence: 99%

“…The final heating step was also maintained at 90 °C for one hour to ensure the low viscosity of the Diphyl DT during the final stirring/sonication step. The mass of CuO nanoparticles required to achieve a given percentage of volume concentration in the nanofluids was estimated from Equation (1) [35]:…”

Section: Nanofluids Preparationmentioning

confidence: 99%

Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications

et al. 2020

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For solar thermal systems, nanofluids have been proposed as working fluids due to their enhanced optical and thermal properties. However, nanoparticles may agglomerate over time, heating and thermal cycles. Even though pristine nanofluids have proven to enhance performance in low-temperature applications, it is still unclear if nanofluids can meet the reliability requirements of solar thermal applications. For this aim, the present study conducted experiments with several formulations of oil-based CuO nanofluids in terms of their maximum operational temperatures and their stabilities upon cyclic heating. In the samples tested, the maximum temperature ranged from 80 to 150 °C, and the number of heating cycles ranged from 5 to 45, with heating times between 5 to 60 min. The results showed that heating temperature, heating cycles, and heating time all exacerbated agglomeration of samples. Following these experiments, orthogonal experiments were designed to improve the preparation process and the resultant thermal-impulse stability. Thermal properties of these samples were characterized, and thermal performance in an “on-sun” linear Fresnel solar collector was measured. All tests revealed that thermal performance of a solar collecting system could be enhanced with nanofluids, but thermal stability still needs to be further improved for industrial applications.

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Effect of suspending hybrid nano-additives on rheological behavior of engine oil and pumping power

Cited by 185 publications

References 41 publications

A review on thermo-physical properties of bio, non-bio and hybrid nanofluids

A review on thermo-physical properties of bio, non-bio and hybrid nanofluids

Mixed convection in a rotating eccentric annulus containing nanofluid using bi-orthogonal grid types: A finite volume simulation

Thermal Stability and Performance Testing of Oil-based CuO Nanofluids for Solar Thermal Applications

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