Current trends in surface tension and wetting behavior of nanofluids

Estellé, Patrice; Cabaleiro, David; Żyła, Gaweł; Lugo, Luis; Murshed, S. M. Sohel

doi:10.1016/j.rser.2018.07.006

Cited by 153 publications

(79 citation statements)

References 54 publications

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“…This also leads to a raise in ST when the MWCNT content increases. Finally, as reported in literature [2], the ST of all the prepared nanofluids decreases with the raise of temperature whatever the base fluid used.…”

Section: Density Of Base Fluids and Nanofluidssupporting

confidence: 83%

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Surface tension of functionalized MWCNT-based nanofluids in water and commercial propylene-glycol mixture

Berrada

Hamze

Desforges

et al. 2019

Journal of Molecular Liquids

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To cite this version:Nawal Berrada, Samah Hamze, Alexandre Desforges, Jaafar Ghanbaja, Jérôme Gleize, et al.. Surface tension of functionalized MWCNT-based nanofluids in water and commercial propylene-glycol mixture. Abstract:Nanofluids which consist of the addition of nanoparticles in a base fluid are envisaged for a large domain of applications. For many of them, the surface tension (ST) behavior of the prepared nanofluids is a key parameter to exploit their thermophysical properties. Due to their remarkable properties, carbon nanotubes (CNTs) are commonly used to develop nanofluids. However, the evolution of the ST of CNT-based nanofluids is still far from being understood and predictable.In the present work, two base fluids were used: water and a commercial mixture of propyleneglycol/water (around 40:60 wt.%). The impact of the used multi-walled CNT (MWCNT) addition, MWCNT concentration (0.001 and 0.1 wt.%) and temperature variation (273.15-333.15 K) on the density and ST evolution for the two kinds of CNT-based nanofluids is studied. The 2 chemically modified MWCNTs are assumed to bear both localized hydrophilic areas due to grafted functional groups and remaining hydrophobic surfaces. The found difference in ST behavior between the two types of nanofluids is explained in light with the involved interfaces in each nanofluid. ST evolution is found to strongly depend on the CNT surface properties.

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Section: Density Of Base Fluids and Nanofluidssupporting

confidence: 83%

“…Some recent efforts have been devoted towards defining and measuring the surface tension of nanofluids as reviewed in ref. [2].…”

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confidence: 99%

Surface tension of functionalized MWCNT-based nanofluids in water and commercial propylene-glycol mixture

Berrada

Hamze

Desforges

et al. 2019

Journal of Molecular Liquids

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“…Surface tension is the amount of force per unit length that is consumed for extending the surface of a liquid by overcoming the intermolecular forces (measured in units of N/m). Surface tension is a crucial parameter in the analysis of heat transfer phenomena such as pool boiling since it affects surface wettability and bubble growth [146]. On the measurement of surface tension of nanofluids, Ahammed et al [147] measured the surface tension of graphene/water nanofluids and showed that with increasing the temperature and nanofluid concentration the surface tension decreases.…”

Section: Surface Tension ( Nf  )mentioning

confidence: 99%

“…Also, d f is the molecular diameter of the base fluid. The above relation can be used for 303< T nf < 343 K, 0.5 < (%)< 6 and 15< d p (nm) < 50.In a recent review, Estellé et al[146] highlighted the role of surface tension in thermal engineering applications and investigated the effects of various parameters such as temperature, surfactant, morphology and concentration of particles, and base fluid type on the surface tension of nanofluids.There are some other correlations on the surface tension of nanofluids which are gathered by Estellé et al[146].…”

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confidence: 99%

Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory

et al. 2019

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It has been more than two decades since the discovery of nanofluids-mixtures of common liquids and solid nanoparticles less than 100 nm in size. As a type of colloidal suspension, nanofluids are typically employed as heat transfer fluids due to their favorable thermal and fluid properties. There have been numerous numerical studies of nanofluids in recent years (more than 1000 in both 2016 and 2017, based on Scopus statistics). Due to the small size and large numbers of nanoparticles that interact with the surrounding fluid in nanofluid flows, it has been a major challenge to capture both the macro-scale and the nano-scale effects of these systems without incurring extraordinarily high computational costs.To help understand the state of the art in modeling nanofluids and to discuss the challenges that remain in this field, the present article reviews the latest developments in modeling of nanofluid flows and heat transfer with an emphasis on 3D simulations. In part I, a brief overview of nanofluids (fabrication, applications, and their achievable thermo-physical properties) will be presented first.Next, various forces that exist in particulate flows such as drag, lift (Magnus and Saffman), Brownian, thermophoretic, van der Waals, and electrostatic double layer forces and their significance in nanofluid flows are discussed. Afterwards, the main models used to calculate the thermophysical properties of nanofluids are reviewed. This will be followed with the description of the main physical models presented for nanofluid flows and heat transfer, from single-phase to Eulerian and Lagrangian two-phase models. In part II, various computational fluid dynamics (CFD) techniques will be presented. Next, the latest studies on 3D simulation of nanofluid flow in various regimes and configurations are reviewed. The present review is expected to be helpful for researchers working on numerical simulation of nanofluids and also for scholars who work on experimental aspects of nanofluids to understand the underlying physical phenomena occurring during their experiments.

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“…[14][15] The data on influence of nanoparticles on the base fluid surface tension for a wide range of nanoparticle type is summarized in the review by Estelle et.al. 16 Flows within a droplet are believed to be only one of multiple keys to understanding of drying dynamics and deposition phenomena. Different hypotheses were developed to explain the formation of different deposition patterns in course of drying and transitions between them.…”

Section: Introductionmentioning

confidence: 99%

Superspreading and Drying of Trisiloxane-Laden Quantum Dot Nanofluids on Hydrophobic Surfaces

2020

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Nanofluids hold promise for a wide range of areas of industry. However, understanding of wetting behavior and deposition formation in course of drying and spreading of nanofluids, particularly containing surfactants, is still poor. In this paper, the evaporation dynamics of quantum dot-based nanofluids and evaporation-driven self-assembly in nanocolloidal suspensions on hexamethyldisilazane-, polystyrene-, and polypropylene-coated hydrophobic surfaces have been studied experimentally. Moreover, for the very first time, we make a step to understanding of wetting dynamics of superspreader surfactant-laden nanofluids. It was revealed that drying of surfactant-free quantum dot nanofluids in contrast to pure liquids undergoes not three but four evaporation modes including last additional pinning mode when contact angle decreases whilst triple contact line is pinned by the nanocrystals. In contrast to previous studies, it was found out that addition of nanoparticles to aqueous surfactant solutions leads to deterioration of spreading rate and to formation of double coffee ring. For all surfaces examined, superspreading in presence and absence of quantum dot nanoparticles takes place. Despite the formation of coffee rings on all substrates, they have different morphology. Particularly, the knot-like structures are incorporated into the ring on hexamethyldisilazane-and polystyrene-coated surfaces.

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Current trends in surface tension and wetting behavior of nanofluids

Cited by 153 publications

References 54 publications

Surface tension of functionalized MWCNT-based nanofluids in water and commercial propylene-glycol mixture

Surface tension of functionalized MWCNT-based nanofluids in water and commercial propylene-glycol mixture

Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory

Superspreading and Drying of Trisiloxane-Laden Quantum Dot Nanofluids on Hydrophobic Surfaces

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