Synthesis and thermal conductivity characteristic of hybrid nanofluids – A review

Leong, Kin Yuen; Ahmad, Ku Zarina Ku; Ong, Hwai Chyuan; Ghazali, Mariyam Jameelah; Baharum, Azizah

doi:10.1016/j.rser.2016.11.068

Cited by 194 publications

(71 citation statements)

References 78 publications

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“…[105][106][107][108][109][110][111][112][113] on the thermal conductivity of water based nanofluids, as well as comprehensive reviews such as Refs. [114][115][116][117][118][119][120][121][122][123].…”

Section: Experimental Based Correlationsmentioning

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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Section: Experimental Based Correlationsmentioning

confidence: 99%

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

et al. 2019

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“…Various materials such as metaloxide, metal and carbonic structures can be used as nanostructures to prepare nanofluids [29][30][31][32]. The properties of nanofluids are highly dependent on the type of solid phase, synthesis procedure, temperature and other factors [33][34][35]. Nanofluids are broadly utilized in various renewable energy systems such as PV/T, solar collectors and solar ponds [36][37].…”

Section: Introductionmentioning

confidence: 99%

Applications of nanofluids in geothermal: A review

Ahmadi¹,

Ramezanizadeh²,

Nazari³

et al. 2018

MMEP

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Geothermal energy is one of the most suitable sources of energy since it is possible to use it continuously for generating power and providing heat. Firstly, recent trends in geothermal energy are discussed and compared with other types of renewable energies. According to the results of this section, geothermal energy is an attractive choice for future power generation due to its low carbon dioxide emission and levelzied cost of electricity in comparison with other renewable energy sources. Afterwards, applications of nanofluid in geothermal-based energy systems are reviewed and their important results are represented. On the basis of literature review, using nanofluids can result in augment in geothermal systems. The enhancement is dependent on several factors including the type of nanofluid, concentration and system specification. According to the results of a study, the effect of using nanofluid on heat transfer rate became more significant at higher flow rates. In addition, using nanofluids can reduce the size of heat exchangers used in geothermal-based system. The main effects of employing nanofluids is increase in convective heat transfer and pressure loss.

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“…The non-metal nanoparticles, for instance, includes single and multi-walled CNT, graphene oxide, graphene nanoplatelets, and nanodiamonds. The further details on various types of nanparticles, base fluids and nanomaterials along with their thermophysical properties and thermal-hydraulic characteristics can be found in recent review studies performed by Gupta et al [1], Ganvir et al [2], Leong et al [3], and Ambreen and Kim [4].…”

Section: Introductionmentioning

confidence: 99%

Thermal-hydraulic analysis of water based ZrO2 nanofluids in segmental baffled shell and tube heat exchangers

2020

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Original scientific paper https://doi.org/10.2298/TSCI180615291SThermal-hydraulic characteristics of water based ZrO 2 nanofluids has been investigated in a segmental baffled shell and tube heat exchanger in turbulent flow regime. The effect of Reynolds number, nanoparticle loading, mass-flow rate, and tube lay-out has been analysed on overall heat transfer coefficient. The effect of Reynolds number on the tube side pressure drop and convective heat coefficient have also been discussed. The effect of shell side mass-flow rate was also investigated on shell side heat transfer coefficient determined using Bell-Delaware method. The nanoparticle volume concentration is taken very low i. e. 0.2%, 0.4%, and 0.8%, respectively. The improvement in both tube side convective heat transfer coefficient and overall heat transfer coefficient has been observed. The maximum improvement in the convective heat transfer coefficient is found to be 14.1% for 0.8% ZrO 2 nanofluids. However, the percentage enhancement in tube side pressure drop was higher than the percentage increment in the tube side heat transfer coefficient.

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Synthesis and thermal conductivity characteristic of hybrid nanofluids – A review

Cited by 194 publications

References 78 publications

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

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

Applications of nanofluids in geothermal: A review

Thermal-hydraulic analysis of water based ZrO2 nanofluids in segmental baffled shell and tube heat exchangers

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