Thermal conductivity measurement and sedimentation detection of aluminum oxide nanofluids by using the 3ω method

Oh, Dong Wook; Jain, Ankur; Eaton, John K.; Goodson, Kenneth E.; Lee, Joon Sik

doi:10.1016/j.ijheatfluidflow.2008.04.007

Cited by 193 publications

(71 citation statements)

References 16 publications

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“…Three articles were found using this method [76,141,142]. Oh et al [76] work consisted of examining the stability of the asprepared Al 2 O 3 /DIW and Al 2 O 3 /EG nanofluids, where the nanoparticles were of 45 nm diameter and 0-4 vol%. The nanofluids effective thermal conductivity was measured for one hour, which showed an increase in its value with time.…”

Section: -Methodmentioning

confidence: 99%

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

Ali

Teixeira

Addali

2018

Journal of Nanomaterials

280

169

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Nanofluids have been receiving great attention in recent years due to their potential usage, not only as an enhanced thermophysical heat transfer fluid but also because of their great importance in applications such as drug delivery and oil recovery. Nevertheless, there are some challenges that need to be solved before nanofluids can become commercially acceptable. The main challenges of nanofluids are their stability and operational performance. Nanofluids stability is significantly important in order to maintain their thermophysical properties after fabrication for a long period of time. Therefore, enhancing nanofluids stability and understanding nanofluid behaviour are part of the chain needed to commercialise such type of advanced fluids. In this context, the aim of this article is to summarise the current progress on the study of nanofluids, such as the fabrication procedures, stability evaluation mechanism, stability enhancement procedures, nanofluids thermophysical properties, and current commercialisation challenges. Finally, the article identifies some possible opportunities for future research that can bridge the gap between in-lab research and commercialisation of nanofluids.

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Section: -Methodmentioning

confidence: 99%

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

Ali

Teixeira

Addali

2018

Journal of Nanomaterials

280

169

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“…[111]. Transient approaches include transient hot-wire technique [39,[112][113][114][115][116], thermal constants analyzer [117,118], temperature oscillation [119,120] and the 3ω method [121]. Steady-state parallel-plate [122] and cylindrical cell [123] can be instead classified as steady-state techniques.…”

Section: Thermal Properties Of Nanofluidsmentioning

confidence: 99%

A review on the heat and mass transfer phenomena in nanofluid coolants with special focus on automotive applications

Bigdeli

Fasano

Cardellini

et al. 2016

Renewable and Sustainable Energy Reviews

110

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Engineered suspensions of nanosized particles (nanofluids) may be characterized by enhanced thermal properties. Due to the increasing need for ultrahigh performance cooling systems, nanofluids have been recently investigated as next-generation coolants for car radiators. However, the multiscale nature of nanofluids implies nontrivial relations between their design characteristics and the resulting thermo-physical properties, which are far from being fully understood. In this work, the role of fundamental heat and mass transfer mechanisms governing thermo-physical properties of nanofluids is reviewed, both from experimental and theoretical point of view. Particular focus is devoted to highlight the advantages of using nanofluids as coolants for automotive heat exchangers, and a number of design guidelines is reported for balancing thermal conductivity and viscosity enhancement in nanofluids. We hope this review may help further the translation of nanofluid technology from small-scale research laboratories to industrial application in the automotive sector.

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“…But laser-flash method usually requires opaque samples and thus is not appropriate for the completely transparent samples. 3ω method is chosen here because 3ω method has shown to be successful in measuring samples in liquid [25,26], in addition to bulk [27] and thin film samples [28]. This means, the thermal conductivity of hydrogels consisting of crosslinked polymer network with significant amount water seems always below that of pure water.…”

Section: Resultsmentioning

confidence: 99%

Thermal Conduction Behaviors of PAAm Hydrogels

Tang¹,

Peng²,

Guo³

et al. 2017

Preprint

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Abstract:As the interface between human and machine becomes blurred, hydrogel incorporated electronics and devices have emerged to be a new class of flexible/stretchable electronic and ionic devices due to their extraordinary properties, such as soft, mechanically robust and biocompatible. However, heat dissipation in these devices could be a critical issue and remains unexplored. Here, we report the experimental measurements and equilibrium molecular dynamics simulations of thermal conduction in polyacrylamide (PAAm) hydrogels. The thermal conductivity of PAAm hydrogels can be modulated by both the crosslinking density and water content in hydrogels. The crosslinking density dependent thermal conductivity in hydrogels varies from 0.33 to 0.51 Wm -1 K -1 , giving a 54% enhancement. We attribute the crosslinking effect to the competition between the increased conduction pathways and the enhanced phonon scattering effect. Moreover ， water content can act as filler in polymers which lead to nearly 40% enhancement in thermal conductivity in PAAm hydrogels with water content vary from 23 to 88 wt%. Furthermore，we find the thermal conductivity of PAAm hydrogel is insensitive to temperature in the range of 25 o C -40 o C. Our study offers fundamental understanding of thermal transport in soft materials and provides design guidance for hydrogel-based devices.

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Thermal conductivity measurement and sedimentation detection of aluminum oxide nanofluids by using the 3ω method

Cited by 193 publications

References 16 publications

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

A Review on Nanofluids: Fabrication, Stability, and Thermophysical Properties

A review on the heat and mass transfer phenomena in nanofluid coolants with special focus on automotive applications

Thermal Conduction Behaviors of PAAm Hydrogels

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