Bottom up Approach Toward Prediction of Effective Thermophysical Properties of Carbon-Based Nanofluids

Fasano, Matteo; Bigdeli, Masoud Bozorg

doi:10.1080/01457632.2017.1384283

Cited by 10 publications

(4 citation statements)

References 77 publications

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“…Fasano and Bigdeli [50] suggested a bottom up approach to systematically explore the thermophysical properties of carbon-based nanofluids with different geometrical, chemical, and physical characteristics. The Prandtl number was suggested as the most adequate parameter for evaluating the best compromise between thermal conductivity and viscosity increases.…”

Section: Heat and Nanofluid Transfermentioning

confidence: 99%

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Menni¹,

Chamkha²,

Lorenzini³

et al. 2019

MMEP

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This paper presents a detailed review of the numerical studies carried out by various researchers in order to obtain enhanced heat transfer in free, forced, and mixed convection, under laminar, transition, and turbulent flow regimes, by using nanofluids in different solar collector geometries. Recently, nanofluids have been increasingly used in various solar collector configurations. Nano-sized metallic or non-metallic particles such as Cu, Au, Al2O3, SiO2, TiO2, CuO, etc, were used in the heat transfer fluid for various solid volume fractions. The average size of the particles was less than 100 nm. The higher conductivity of nanoparticles even at low particle concentration results in higher thermal conductivity of the base fluid and improves the thermal characteristics of the system. Nanoparticle size, type and shape are important factors for the thermal conductivity enhancement of the nanofluid with nanoparticles.

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Section: Heat and Nanofluid Transfermentioning

confidence: 99%

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Menni¹,

Chamkha²,

Lorenzini³

et al. 2019

MMEP

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“…A Newtonian behaviour was reported for these nanofluids with an increase in viscosity with CNT content. A bottom up approach was developed in [12] to evaluate the best trade-off between thermal conductivity and viscosity increases for different carbon-based nanofluids, including CNT and graphene nanosheets. Such an approach was originally based on Prandtl number evaluation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Viscosity of Purified Multi-Walled Carbon Nanotubes Water and Water-Propylene Glycol-Based Nanofluids

Hamze

Berrada

Desforges

et al. 2020

Heat Transfer Engineering

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Dynamic viscosity of purified multi-walled carbon nanotubes water and waterpropylene glycol based nanofluidsWe report in this study the experimental investigation of the dynamic viscosity of purified multi-walled carbon nanotubes (MWCNT) water and water-propylene glycol based nanofluids in the temperature range 10-80 °C. Four weight concentrations of MWCNTs are considered, between 0.005 and 0.1 wt.%. Triton X-100, a common nonionic surfactant, is used to disperse the nanotubes and stabilize the nanofluids as evidenced by optical characterization. Purified and non-damaged MWCNTs are used for nanofluid preparation by the two-step method.MWCNT characterization is deeply investigated from a set of complementary techniques such as thermogravimetric analysis, transmission electron microscopy and Raman spectroscopy. The studied nanofluids behave as Newtonian fluids for low nanotube content while a shear-thinning behavior is noticed for higher concentration. Finally, the viscosity enhancement of nanofluids with MWCNT loading is compared to the modified Maron-Pierce model considering the presence of aggregates and their size obtained from optical observations.

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“…In fact, the presence of defects (e.g., atom substitutions, atomic vacancies, Stone-Wales dislocations) [27], edge chirality [28], dumping due to the surrounding polymer [29], and interfacial thermal resistance (R k , also known as Kapitza resistance) at the filler-matrix and filler-filler interfaces significantly hinder the heat transfer through the network of fillers [30,31]. In particular, R k originates from the mismatch of phonon spectra at the filler-filler and filler-matrix interfaces, which causes phonon scattering and thus a bottleneck for the heat transfer across the interfaces [32][33][34]. The resulting additional interfacial thermal resistances may thus lead to a dramatic reduction in the effective λ of PNCs.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer at the Interface of Graphene Nanoribbons with Different Relative Orientations and Gaps

et al. 2019

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Because of their high thermal conductivity, graphene nanoribbons (GNRs) can be employed as fillers to enhance the thermal transfer properties of composite materials, such as polymer-based ones. However, when the filler loading is higher than the geometric percolation threshold, the interfacial thermal resistance between adjacent GNRs may significantly limit the overall thermal transfer through a network of fillers. In this article, reverse non-equilibrium molecular dynamics is used to investigate the impact of the relative orientation (i.e., horizontal and vertical overlap, interplanar spacing and angular displacement) of couples of GNRs on their interfacial thermal resistance. Based on the simulation results, we propose an empirical correlation between the thermal resistance at the interface of adjacent GNRs and their main geometrical parameters, namely the normalized projected overlap and average interplanar spacing. The reported correlation can be beneficial for speeding up bottom-up approaches to the multiscale analysis of the thermal properties of composite materials, particularly when thermally conductive fillers create percolating pathways.

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Bottom up Approach Toward Prediction of Effective Thermophysical Properties of Carbon-Based Nanofluids

Cited by 10 publications

References 77 publications

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Dynamic Viscosity of Purified Multi-Walled Carbon Nanotubes Water and Water-Propylene Glycol-Based Nanofluids

Heat Transfer at the Interface of Graphene Nanoribbons with Different Relative Orientations and Gaps

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