Synthesis, characterization, thermal conductivity and sensitivity of CuO nanofluids

Agarwal, Ravi; Verma, Kamalesh; Agrawal, Narendra Kumar; Duchaniya, Rajendra Kumar; Singh, Ramvir

doi:10.1016/j.applthermaleng.2016.04.051

Cited by 178 publications

(48 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Agarwal et al . made a series of experiments about CuO nanofluilds, and they declared that the thermal conductivity of nanofluilds increased by 40%, 27%, 19% using distilled water, ethylene glycol, and engine oil as the base fluidsrespectively 30 . Manimaran et al .…”

Section: Resultsmentioning

confidence: 99%

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Zhu

Wang

et al. 2018

Sci Rep

134

View full text Add to dashboard Cite

Nanofluids offer the exciting new possibilities to enhance heat transfer performance. In this paper, experimental and theoretical investigations have been conducted to determine the effect of CuO nanowires on the thermal conductivity and viscosity of dimethicone based nanofluids. The CuO nanowires were prepared through a thermal oxidation method, and the analysis indicated that the as-prepared CuO nanowires had high purity, monocrystalline with a monoclinic structure and large aspect ratio compared to CuO nanospheres. The experimental data show that the thermal conductivity of the nanofluids increases with the volume fraction of CuO nanowires or nanospheres, with a nearly linear relationship. For the nanofluid with the addition of 0.75 vol.% CuO nanowires, the thermal conductivity enhancement is up to 60.78%, which is much higher than that with spherical CuO nanoparticles. The nanofluids exhibit typical Newtonian behavior, and the measured viscosity of CuO nanowires contained nanofluids were found only 6.41% increment at the volume fraction of 0.75%. It is attractive in enhanced heat transfer for application. The thermal conductivity and viscosity of CuO nanofluids were further calculated and discussed by comparing our experimental results with the classic theoretical models. The mechanisms of thermal conductivity and viscosity about nanofluids were also discussed in detail.

show abstract

Section: Resultsmentioning

confidence: 99%

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Zhu

Wang

et al. 2018

Sci Rep

134

View full text Add to dashboard Cite

show abstract

“…Experimentation has shown that nanofluid thermal conductivity is dependent upon base liquid [3,[9][10][11][12][13][14][15], possible surfactant [16][17][18][19][20][21][22][23], concentration [1,3,4,[7][8][9][10][11]13,15,16,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40], temperature [5,8,10,12,13,25,…”

Section: Nanofluid Thermal Conductivitymentioning

confidence: 99%

“…Researchers have observed that the thermal conductivity of nanofluids increases with the thermal conductivity of the base liquid [3,[9][10][11][12][13][14][15]. For example, Barbés et al [9] measured the thermal conductivities of CuO-water and CuO-Ethylene Glycol nanofluids.…”

Section: Effects Of Base Liquid On Nanofluid Thermal Conductivitymentioning

confidence: 99%

“…It was observed that for a given volume fraction and temperature, the thermal conductivity of CuO-water nanofluid was higher. Also, Agarwal et al [10] measured the thermal conductivities of CuO nanofluids, mixing CuO nanoparticles with water, Ethylene Glycol, and engine oil. The results are shown in Figure 12.…”

Section: Effects Of Base Liquid On Nanofluid Thermal Conductivitymentioning

confidence: 99%

See 1 more Smart Citation

Nanofluid Thermal Conductivity and Effective Parameters

et al. 2018

View full text Add to dashboard Cite

Due to the more powerful and miniaturized nature of modern devices, conventional heat-transfer working fluids are not capable of meeting the cooling needs of these systems. Therefore, it is necessary to improve the heat-transfer abilities of commonly used cooling fluids. Recently, nanoparticles with different characteristics have been introduced to base liquids to enhance the overall thermal conductivity. This paper studies the influence of various parameters, including base liquid, temperature, nanoparticle concentration, nanoparticle size, nanoparticle shape, nanoparticle material, and the addition of surfactant, on nanofluid thermal conductivity. The mechanisms of thermal conductivity enhancement by different parameters are discussed. The impact of nanoparticles on the enhanced thermal conductivity of nanofluids is clearly shown through plotting the thermal conductivities of nanofluids as a function of temperature and/or nanoparticle concentration on the same graphs as their respective base liquids. Additionally, the thermal conductivity of hybrid nanofluids, and the effects of the addition of carbon nanotubes on nanofluid thermal conductivity, are studied. Finally, modeling of nanofluid thermal conductivity is briefly reviewed.

show abstract

“…The metal oxide nanoparticles significantly enhance the heat-carrying capacity of conventional fluids [11][12][13][14]. Al 2 O 3 [15], CuO [16], Fe 2 O 3 [17], TiO 2 [18], etc based nanofluids show improved performance in terms of an increase in the thermal conductivity. Nanofluids can be of great use in nuclear reactors for the power production industry [19].…”

Section: Introductionmentioning

confidence: 99%

Neutron irradiation sensitivity of thermal conductivity for Al₂O₃ nanofluids

Agarwal

Agrawal²,

Bansal

et al. 2020

Mater. Res. Express

Self Cite

View full text Add to dashboard Cite

In this work, the thermal conductivity of Al 2 O 3 nanofluids has been investigated for the sensitivity towards neutron irradiation. The solution combustion method has been used for the synthesis of Al 2 O 3 nanoparticles that have been used for the preparation of the nanofluids. Prepared nanofluids have been neutron-irradiated for 7 and 14 days. Dynamic Light Scattering, Scanning Electron Microscopy, and Ultraviolet-Visible Spectroscopy have been used to ascertain the change in properties before and after neutron-irradiation. Thermal conductivity has been measured for un-irradiated and neutron-irradiated nanofluids at 30°C using a KD2 pro thermal properties analyzer. The decrease in thermal conductivity has been observed after neutron-irradiation that further decreases with increased duration of exposure and concentration of nanoparticles. 5 and 10% decrease in thermal conductivity has been recorded after 7 and 14 days of neutron irradiation for change in concentration from 0 to 2 volume percent. Neutronirradiation sensitivity analysis revealed that heat transfer characteristics are sensitive at higher concentrations and during initial exposure of neutron-irradiations.

show abstract

Synthesis, characterization, thermal conductivity and sensitivity of CuO nanofluids

Cited by 178 publications

References 27 publications

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Nanofluid Thermal Conductivity and Effective Parameters

Neutron irradiation sensitivity of thermal conductivity for Al₂O₃ nanofluids

Contact Info

Product

Resources

About

Synthesis, characterization, thermal conductivity and sensitivity of CuO nanofluids

Cited by 178 publications

References 27 publications

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Intriguingly high thermal conductivity increment for CuO nanowires contained nanofluids with low viscosity

Nanofluid Thermal Conductivity and Effective Parameters

Neutron irradiation sensitivity of thermal conductivity for Al2O3 nanofluids

Contact Info

Product

Resources

About

Neutron irradiation sensitivity of thermal conductivity for Al₂O₃ nanofluids