Influence of nanoparticle shape factor on convective heat transfer and energetic performance of water-based SiO2 and ZnO nanofluids

Ferrouillat, Sébastien; Bontemps, André; Poncelet, Olivier; Soriano, Olivier; Gruss, Jean-Antoine

doi:10.1016/j.applthermaleng.2012.10.020

Cited by 116 publications

(42 citation statements)

References 15 publications

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“…e model predicts well the thermal conductivity of nanofluid with ZnO nanoparticles with experimental data by Ferrouillat et al [35] in rod-like shape. e Reynolds stress tensor…”

Section: Governing Equationssupporting

confidence: 59%

Numerical Research on Convective Heat Transfer and Resistance Characteristics of Turbulent Duct Flow Containing Nanorod-Based Nanofluids

Yuan

Lin

2018

Journal of Nanotechnology

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A coupled numerical model for nanorod-based suspension flow is constructed, and the convective heat transfer and resistance characteristics of the nanofluid duct flow are investigated.e numerical results are verified by experimental results and theoretical models. Most of nanorods are located randomly in the bulk fluid, while particles near the wall aligned with the flow direction. Friction factor of nanofluids with nanorods increases with higher particle volume concentration or aspect ratio, but the increment reduces when the Reynolds number gets larger. e relative Nusselt number is obtained to characterize the intensity of convective heat transfer. e results show that the Nusselt number of nanofluids increases when the particle volume concentration or aspect ratio becomes larger. Compared to increasing the aspect ratio of nanorods, increasing the particle volume concentration would be more effective on enhancing the convective heat transfer intensity in industrial applications although it will cause a slight increase of resistance.

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“…e model predicts well the thermal conductivity of nanofluid with ZnO nanoparticles with experimental data by Ferrouillat et al [35] in rod-like shape. e Reynolds stress tensor…”

Section: Governing Equationssupporting

confidence: 59%

Numerical Research on Convective Heat Transfer and Resistance Characteristics of Turbulent Duct Flow Containing Nanorod-Based Nanofluids

Yuan

Lin

2018

Journal of Nanotechnology

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“…They noticed that the relative Fig. 4 a Viscosity of silica-water nanofluid; b viscosity of ZnO-water nanofluid [40] Int Nano Lett (2014) 4:109-120 115 viscosity of Al 2 O 3 and TiO 2 nanofluids increases with increasing nanoparticle concentration, but the viscosity of CuO nanofluid was almost independent of nanoparticle concentration. Figure 5 describes the effect of volume fraction or volume concentration on viscosity of Al 2 O 3 nanofluids.…”

Section: Effect Of Volume Concentrationmentioning

confidence: 99%

“…Timofeeva et al [39] reported that elongated particles increase the viscosity of nanofluids rather than spherical nanoparticles. Ferrouillat et al [40] presented another interesting study on the influence of nanoparticle shape factor on convective heat transfer and performance of water-based SiO 2 and ZnO nanofluids. They observed that a ZnO/water nanofluid with rod-shaped nanoparticles has slightly less viscosity as compared to that of polygonal particles.…”

Section: Effect Of Particle Size and Shapementioning

confidence: 99%

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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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“…Stagnation point flow of mixed convective and radiated nanofluid past a stretching or shrinking surface with viscous dissipation and heat generation in a porous medium was discussed numerically by Pal and Mandal (2015). The researchers Julie et al (2007) and Ferrouillat et al (2011) discussed the influence of particle shape on drug delivery and convective heat transfer cases.…”

Section: Introductionmentioning

confidence: 99%

Stagnation point flow and heat transfer behavior of Cu–water nanofluid towards horizontal and exponentially stretching/shrinking cylinders

Sulochana

Sandeep

2015

Appl Nanosci

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In this study we analyzed the stagnation point flow and heat transfer behavior of Cu-water nanofluid towards horizontal and exponentially permeable stretching/ shrinking cylinders in presence of suction/injection, heat source and shape of nanoparticles. The governing boundary layer equations are transformed to nonlinear ordinary differential equations using similarity transformation which are then solved numerically using bvp4c Matlab package. The influence of non-dimensional governing parameters on the flow field and heat transfer characteristics are discussed and presented through graphs and tables. The study indicates that the solutions for the horizontal and exponential cylinders are non-unique and shape of nanoparticles also influences the rate of heat transfer. Comparisons of the present results with existed studies are presented. Present study has an excellent agreement with the existed studies under some special conditions.

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Influence of nanoparticle shape factor on convective heat transfer and energetic performance of water-based SiO2 and ZnO nanofluids

Cited by 116 publications

References 15 publications

Numerical Research on Convective Heat Transfer and Resistance Characteristics of Turbulent Duct Flow Containing Nanorod-Based Nanofluids

Numerical Research on Convective Heat Transfer and Resistance Characteristics of Turbulent Duct Flow Containing Nanorod-Based Nanofluids

A brief review on viscosity of nanofluids

Stagnation point flow and heat transfer behavior of Cu–water nanofluid towards horizontal and exponentially stretching/shrinking cylinders

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