Preparation and Stability of Nanofluids-A Review

Mukherjee, Sayantan; Paria, Somjit

doi:10.9790/1684-0926369

Cited by 207 publications

(87 citation statements)

References 38 publications

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“…Some researchers have advocated that the two step method is advisable for the synthesis of oxide particles suspended in a nanofluid rather than metal particles suspended in a nanofluid [17]. A significant area of research and application in nanofluids centers around the preparation of a fluid that is stable for a longer duration [18]. Although the two-step method is economical, this method poses the problems of drying, storage, and transportation.…”

Section: Nanofluid Synthesismentioning

confidence: 99%

Review on Synthesis, Thermo-Physical Property, and Heat Transfer Mechanism of Nanofluids

Patil

Seo²,

Kang

et al. 2016

Energies

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Nanofluids are suspended nano-sized particles in a base fluid. With increasing demand for more high efficiency thermal systems, nanofluids seem to be a promising option for researchers. As a result, numerous investigations have been undertaken to understand the behaviors of nanofluids. Since their discovery, the thermo-physical properties of nanofluids have been under intense research. Inadequate understanding of the mechanisms involved in the heat transfer of nanofluids has been the major obstacle for the development of sophisticated nanofluids with the desired properties. In this comprehensive review paper, investigations on synthesis, thermo-physical properties, and heat transfer mechanisms of nanofluids have been reviewed and presented. Results show that the thermal conductivity of nanofluids increases with the increase of the operating temperature. This can potentially be used for the efficiency enhancement of thermal systems under higher operating temperatures. In addition, this paper also provides details concerning dependency of the thermo-physical properties as well as synthesis and the heat transfer mechanism of the nanofluids.

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Section: Nanofluid Synthesismentioning

confidence: 99%

Review on Synthesis, Thermo-Physical Property, and Heat Transfer Mechanism of Nanofluids

Patil

Seo²,

Kang

et al. 2016

Energies

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“…This term was used in 1974 by a Japanese scientist, Norio Taniguchi [1]. A nanofluid is generally understood to mean a suspension of nano-sized particles having diameter of about 1 nm to 100 nm in a conventional base fluid [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Abdullah¹,

Mohamad²,

Hashim³

et al. 2016

J. MECH. ENG. SCI.

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This paper focused on thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids at three different temperatures (6C, 25C and 40C). For the preparation of nanofluids, a two-step method, comprised of homogenisation and sonication, was used on a mixture of MWCNT-OH, PVP and the base fluid. The results revealed that thermal conductivity was enhanced by about 8.86% for 0.8 wt% deionised water-based MWCNT-OH nanofluid, and by 5.37% for 0.2 wt% ethylene glycol-based MWCNT-OH nanofluid. Meanwhile, in viscosity test, the highest temperature of 40C exhibited lowest viscosity. This phenomenon happened only with ethylene glycol-based nanofluid, whilst the data on the viscosity of deionised water-based nanofluid was inconsistent at certain nanofluid concentrations . In conclusion, addition of MWCNT-OH into base fluid enhanced base fluid performance , giving it the potential to be used in cooling system applications.

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“…Nanofluids with zeta potential between 40-60 mV have an acceptable stability by electrostatic repulsion [4]. Table 3 shows that the zeta potential of nanofluids after addition 30 wt.% LiBr salt decreases to a value between 1-3 mV.…”

Section: Stability Analysismentioning

confidence: 98%

“…Such particles are then dispersed into a base fluid under suitable ionic or surfactant conditions [4]. Considering the close relationship between the structures and properties, the dispersed status of nanoparticles in the fluid plays a crucial role in determining the effective properties of the dispersion.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of stable iron oxide nanoparticle dispersions in high ionic media

Nourafkan

Asachi

Gao

et al. 2017

Journal of Industrial and Engineering Chemistry

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Graphical abstract2 ABSTRACT A novel one-pot method was developed in this work to synthesize and disperse nanoparticles in a binary base fluid. As an example, stable magnetite iron oxide (Fe3O4) dispersions, i.e., nanofluids, were produced in a high ionic media of binary lithium bromide-water using a microemulsion-mediated method. The effects of temperature and precursor concentration on morphology and size distribution of produced nanoparticles were evaluated. An effective steric repulsion force was provided by the surface functionalization of nanoparticles during the phase transfer, supported by the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The formed nanoparticles exhibited a superior stability against agglomeration in the presence of high concentrations of lithium bromide, i.e., from 20 to 50 wt.%, which make them good candidates for a range of novel applications.

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Preparation and Stability of Nanofluids-A Review

Cited by 207 publications

References 38 publications

Review on Synthesis, Thermo-Physical Property, and Heat Transfer Mechanism of Nanofluids

Review on Synthesis, Thermo-Physical Property, and Heat Transfer Mechanism of Nanofluids

Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Synthesis of stable iron oxide nanoparticle dispersions in high ionic media

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