A review of experimental investigations on thermal phenomena in nanofluids

Thomas, Shijo; Sobhan, C. B.

doi:10.1186/1556-276x-6-377

Cited by 105 publications

(30 citation statements)

References 45 publications

(67 reference statements)

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“…The overall report indicates a very common downward trend in viscosity with an increase in temperature. As the temperature increases, the intermolecular attraction between the nanoparticles and their base fluids weakens [53]. Hence, the viscosity of nanofluids decreases with the increase in temperature.…”

Section: Effect Of Temperaturementioning

confidence: 99%

A brief review on viscosity of nanofluids

et al. 2014

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Since the past decade, rapid development in nanotechnology has produced several aspects for the scientists and technologists to look into. Nanofluid is one of the incredible outcomes of such advancement. Nanofluids (colloidal suspensions of metallic and nonmetallic nanoparticles in conventional base fluids) are best known for their remarkable change to enhanced heat transfer abilities. Earlier research work has already acutely focused on thermal conductivity of nanofluids. However, viscosity is another important property that needs the same attention due to its very crucial impact on heat transfer. Therefore, viscosity of nanofluids should be thoroughly investigated before use for practical heat transfer applications. In this contribution, a brief review on theoretical models is presented precisely. Furthermore, the effects of nanoparticles' shape and size, temperature, volume concentration, pH, etc. are organized together and reviewed.

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Section: Effect Of Temperaturementioning

confidence: 99%

A brief review on viscosity of nanofluids

et al. 2014

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“…This trend is clearly reflected and well documented in numerous original research papers and in extensive state-ofthe-art review articles in the engineering literature that cover a wide range of nanofluid-related research and development including nanofluid preparation and characterization , nanofluid effective thermophysical property investigation , nanofluid heat transfer performance [4][5][6]9,10,[13][14][15][17][18][19]22,24,28,29,31,32,35,36,[38][39][40][46][47][48][50][51][52][53][54][55], and nanofluid application exploration [5,8,[13][14][15]19,22,29,40,46,56,57].…”

Section: Introductionmentioning

confidence: 98%

Comparative review of turbulent heat transfer of nanofluids

Timofeeva

Singh

et al. 2012

International Journal of Heat and Mass Transfer

114

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“…The thermal and heat transfer properties of the conventional cooling fluids are enhanced by suspending nanometer-sized (1-100 nm) solid particles with higher thermal conductivity and high surface area, resulting in a two-phase mixture called a nanofluid [4][5][6]. Nowadays, nanofluids are widely used in a variety of applications, such as electronic cooling, internal combustion engine cooling and lubrication, industrial cooling, industrial and comfort air conditioning and extraction of geothermal and solar energy [7,8] due to its enhanced thermal properties [9][10][11][12][13]. An investigation of the viscosity (one of the thermophysical properties) of nanofluids has inevitable importance in finding the adequate pumping power, Reynolds number, Prandtl number and heat transfer coefficient in thermal systems that employ fluid flow [14,15].…”

Section: Introductionmentioning

confidence: 99%

Effect of volume concentration and temperature on viscosity and surface tension of graphene–water nanofluid for heat transfer applications

Ahammed

Asirvatham

Wongwises

2015

J Therm Anal Calorim

168

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In the present study, the effect of volume concentration (0.05, 0.1 and 0.15 %) and temperature (10-90°C) on viscosity and surface tension of graphene-water nanofluid has been experimentally measured. The sodium dodecyl benzene sulfonate is used as the surfactant for stable suspension of graphene. The results showed that the viscosity of graphene-water nanofluid increases with an increase in the volume concentration of nanoparticles and decreases with an increase in temperature. An average enhancement of 47.12 % in viscosity has been noted for 0.15 % volume concentration of graphene at 50°C. The enhancement of the viscosity of the nanofluid at higher volume concentration is due to the higher shear rate. In contrast, the surface tension of the graphenewater nanofluid decreases with an increase in both volume concentration and temperature. A decrement of 18.7 % in surface tension has been noted for the same volume concentration and temperature. The surface tension reduction in nanofluid at higher volume concentrations is due to the adsorption of nanoparticles at the liquid-gas interface because of hydrophobic nature of graphene; and at higher temperatures, is due to the weakening of molecular attractions between fluid molecules and nanoparticles. The viscosity and surface tension showed stronger dependency on volume concentration than temperature. Based on the calculated effectiveness of graphene-water nanofluids, it is suggested that the graphene-water nanofluid is preferable as the better coolant for the real-time heat transfer applications.

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A review of experimental investigations on thermal phenomena in nanofluids

Cited by 105 publications

References 45 publications

A brief review on viscosity of nanofluids

A brief review on viscosity of nanofluids

Comparative review of turbulent heat transfer of nanofluids

Effect of volume concentration and temperature on viscosity and surface tension of graphene–water nanofluid for heat transfer applications

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