Rheological behaviour of nanofluids

Chen, Haisheng; Ding, Yulong; Tan, Chunqing

doi:10.1088/1367-2630/9/10/367

Cited by 524 publications

(282 citation statements)

References 47 publications

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“…Unlike the above studies, Prasher et al [37] and Chen et al [18,59] in their studies of Al 2 O 3 and TiO 2, respectively, in the temperature range of 20-60°C, found no change in relative viscosity with increase in temperature.…”

Section: Effect Of Temperaturementioning

confidence: 67%

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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: 67%

“…In 2007, Chen et al [18] modified Krieger-Dougherty equation by considering the effects of variable packing fraction within the aggregate structure. The modified equation is presented as:…”

Section: Theoretical Studiesmentioning

confidence: 99%

A brief review on viscosity of nanofluids

et al. 2014

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“…For the sake of simplicity, the particles are supposed to be spherical and monodisperse. Many experiments have been performed on investigating the role of agglomeration [18][19][20][21][22], which will therefore be given a special attention. The majority of models taking into account nanoparticles' agglomeration introduce an agglomerate radius that is kept fixed [23] or consider a change in agglomerate's size due to aging [21], without examining the influence of volume fraction on the degree of agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Effect of volume-fraction dependent agglomeration of nanoparticles on the thermal conductivity of nanocomposites: Applications to epoxy resins, filled by SiO2, AlN and MgO nanoparticles

Machrafi

Lebon

Iorio

2016

Composites Science and Technology

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Abstract.A thermodynamic model for transient heat conduction in ceramic-polymer nanocomposites is proposed. The model takes into account particle's size, particle's volume fraction, and interface characteristics with emphasis on the effect of agglomeration of particles on the effective thermal conductivity of the nanocomposite.The originality of the present work is its basement on extended irreversible thermodynamics, combining nano-and continuum-scales without invoking molecular dynamics. The model is compared to experimental data using the examples of SiO2, AlN and MgO nanoparticles embedded in epoxy resin. The analysis is limited to spherical nanoparticles. The dependence of the degree of agglomeration with respect of the volume fraction of particles is also discussed and a power-law relation is established through a kinetic mechanism and experiments performed in our laboratory. This relation is used in 2 our theoretical model, resulting into a good agreement with experiments. It is shown that the effective thermal conductivity may either increase or decrease with the degree of agglomeration.

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“…Chen et al [14] reported the rheological behavior of TiO 2 /Ethylene Glycol nanofluids. Their experimental results show that the TiO 2 /EG nanofluids are Newtonian over a shear rate range of 0.5-10 4 s -1 , the shear viscosity is a strong function of temperature, particle concentration and aggregation and the relative viscosity is independent of the temperature.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of the viscosity of nanofluids at low temperatures

et al. 2012

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The effects due to temperature and shearing time on viscosity for Al 2 O 3 /water and CNT/water based nanofluids at low concentration and low temperatures are experimentally investigated. The viscosity data were collected using a stress-controlled rheometer equipped with parallel plate geometry under up and down shear stress ramp. CNT and Al2O3 water based nanofluids exhibited hysteresis behaviour when the stress is gradually loaded and unloaded, depending also on shearing time. Experiments also showed that the nanofluid suspensions indicated either Newtonian or nonNewtonian behaviour, depending on shear rate. CNT water based nanofluid behaves as Newtonian fluid at high shear rate whereas Al 2 O 3 water based nanofluid is non-Newtonian within the range of low temperatures investigated.

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Rheological behaviour of nanofluids

Cited by 524 publications

References 47 publications

A brief review on viscosity of nanofluids

A brief review on viscosity of nanofluids

Effect of volume-fraction dependent agglomeration of nanoparticles on the thermal conductivity of nanocomposites: Applications to epoxy resins, filled by SiO2, AlN and MgO nanoparticles

Experimental investigations of the viscosity of nanofluids at low temperatures

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