The effect of particle size on the thermal conductivity of alumina nanofluids

Beck, Michael P.; Yuan, Yanhui; Warrier, Pramod; Teja, Amyn S.

doi:10.1007/s11051-008-9500-2

Cited by 367 publications

(204 citation statements)

References 25 publications

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“…Data for the water based nanofluids with SiO2, TiO2 and Al2O3 particles are compared in Fig. 3, 4 with experimental data [15,[34][35][36][37][38][39][40], while the dashed line corresponds to formula (1). Our data are generally in good agreement with data of other authors.…”

Section: Sio2supporting

confidence: 86%

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Thermal conductivity measurements of nanofluids

Pryazhnikov

Минаков

Rudyak

et al. 2017

International Journal of Heat and Mass Transfer

212

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The paper presents the results of systematic measurements of the thermal conductivity coefficient of nanofluids at room temperature. In total, more than fifty various nanofluids based on water, ethylene glycol, and engine oil containing particles of SiO2, Al2O3, TiO2, ZrO2, CuO, and diamond were studied. The nanoparticles volume concentration ranged from 0.25 to 8% and the particles size ranged from 10 to 150 nm. It is shown that the thermal conductivity of nanofluids is not described by the classical theories (Maxwell's and so forth). The nanofluid thermal conductivity coefficient is a complicated function not only of the particle concentration, but also the particles size, their material, and type of base fluid. Measured thermal conductivity coefficients almost always exceed the values calculated by the Maxwell's formula, though nanofluids with sufficiently small particles may have thermal conductivity coefficients even lower than those predicted by the Maxwell theory. However, in all cases, the nanofluid thermal conductivity coefficient enhances with increasing particle size. It is convincingly shown that there is no direct correlation between the thermal conductivity of the nanoparticle material and the thermal conductivity of nanofluid containing these particles. The base liquid also significantly influences the effective thermal conductivity of the nanofluid. It has been confirmed that the lower the thermal conductivity of the base fluid, the higher the relative thermal conductivity coefficient of the nanofluid.

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Section: Sio2supporting

confidence: 86%

“…Similar data for nanofluids with particles of Al2O3, SiC and Au were reported in [15][16][17][18][19].…”

Section: Introductionsupporting

confidence: 84%

Thermal conductivity measurements of nanofluids

Pryazhnikov

Минаков

Rudyak

et al. 2017

International Journal of Heat and Mass Transfer

212

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“…All these parameters are having certain level of effect baded on the nature of nano particle and basefluid. Thermal conductivity is measured by the different method such as transient hot-wire method [1][2][3][4], steady-state parallel plate technique, temperature oscilloscope method, micro hot strip method, and optical beam deflection [5][6][7][8]. Many researchers worked and achieved the beneficial result for thermal conductivity enhancement using various techniques.…”

Section: Influencing Parametersmentioning

confidence: 99%

“…For 0.5% volume fraction of nanofluid, the thermal conductivity enhancement was decreased from 38% to 3% when increasing the particle size from 9 to 83nm. It was investigated the effect of the particle size such as Al2Cu and Ag2Al [14] particle dispersed into water and EG, Al2O3/water and Al2O3/eg [22] particle size vary from 30-120nm for Al2Cu and Ag2Al,8 and 282 nm for Al2O3. They [23,24] measured the thermal conductivity of Al2O3 nanofluid and compare with [25][26][27] which showed that there was not much difference in the thermal conductivity of the particle size 80,38.4 and 47nm.…”

Section: Particle Sizementioning

confidence: 99%

Characteristic analysis of De-Ionised water and Ethylene Glycol based Aluminium Oxide Nanofluid

Gopalsmy¹,

Karunakaran²

2017

JAC

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“…From the literature some information about the main parameters that have influence on mixtures was selected (temperature, speed and mixing time), and most of the researchers report that nanoparticle's dispersions in different base fluids are made at maximum speed (depending on the devices) [7] and at room temperature [8], [9] although there are some studies that report the analyses of nanofluids at different temperatures (20°C, 35°C and 50°C) [10]. When referring to time, this varies a lot according to the amount of nanofluid that is intended to be achieved [11], [12], [13] [14] The shape of the reactor's bottom can have a significant effect on the hydrodynamic conditions inside it and hence the ability to achieve a homogeneous suspension.…”

Section: Fig -1: Tem Image Of Al 2 O 3 Nanoparticlesmentioning

confidence: 99%