Thermal conductivity and viscosity of glycerine-water based Cu-SiO2 hybrid nanofluids

Lahari, M. L. R. Chaitanya; Sai, P. H. V. Sesha Talpa; Sharma, K.V.; Narayanaswamy, Krithika

doi:10.1016/j.matpr.2022.05.284

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Conversely, Maiti et al, [11] obtained contrasting results in their study of unsteady stagnation Al2O3-Cu hybrid nanofluid, where they found a decrease in temperature when incorporating the magnetic parameter. Lahari et al, [12] researched the Cu-SiO2 hybrid nanofluid with glycerine water as the base fluid and discovered that the dynamic viscosity rose as the volume concentration increased. This conclusion is consistent with the findings of Dezfulizadeh et al, [13] who conducted experimental research on Cu-SiO2-MWCN hybrid nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Hiemenz Flow of Cu-SiO2 Hybrid Nanofluid with Heat Generation/Absorption

Yap Bing Kho,

Rahimah Jusoh,

Mikhail Sheremet

et al. 2023

ARFMTS

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The use of hybrid nanofluid as an alternate heat transfer fluid has shown great potential, and ongoing research to improve its thermal conductivity is important. This study focuses on the impact of heat generation/ absorption on the unsteady Hiemenz flow of aqueous hybrid nanofluid containing copper and silica nanoparticles. Mathematical equations for the hybrid nanofluid model are derived using suitable similarity transformations and solved numerically using bvp4c codes in Matlab software. The results indicate that increased heat generation/absorption leads to an increase in both momentum and thermal boundary layer thickness. The effects of suction and nanoparticle concentration are also analysed and presented graphically. Additionally, a stability analysis is also performed, which discloses that the first solution produced is stable, however, the second solution is not. The findings of this study provide valuable insights into the behaviour of hybrid nanofluid in unsteady flow and can aid in the development of more efficient heat transfer fluids for various engineering applications.

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Section: Introductionmentioning

confidence: 99%

Unsteady Hiemenz Flow of Cu-SiO2 Hybrid Nanofluid with Heat Generation/Absorption

Yap Bing Kho,

Rahimah Jusoh,

Mikhail Sheremet

et al. 2023

ARFMTS

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Analysis of the mechanism of enhanced heat transfer by nanofluids

Zhang,

Yao,

Wang

et al. 2023

J Mol Model

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Effective Thermal Conductivity of Nanofluids Containing Silicon Dioxide or Zirconium Dioxide Nanoparticles Dispersed in a Mixture of Water and Glycerol

et al. 2022

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The present study investigates the effective thermal conductivity of nanofluids containing crystalline or amorphous silicon dioxide (SiO2), or zirconium dioxide (ZrO2) nanoparticles dispersed in a mixture of water and glycerol with a mass ratio of 60:40. Such fluids are relevant as potential cutting fluids in tribology and feature a broad distribution of irregularly shaped non-spherical particles of dimensions on the order of (100 to 200) nm that were produced by comminution of larger particles or particle aggregates. A new steady-state guarded parallel-plate instrument was applied for the absolute measurement of the effective thermal conductivity of the nanofluids with an expanded uncertainty (coverage factor k = 2) of 3% for temperatures from (293 to 353) K and particle volume fractions up to 0.1. For a constant volume fraction of 0.03 for the three particle types, the measured thermal-conductivity ratios, i.e. the effective thermal conductivity of the nanofluids relative to the thermal conductivity of the base fluid, are less than 1.05 and not affected by temperature. In the case of the nanofluids with crystalline SiO2, with increasing particle volume fraction from 0.03 to 0.10 the thermal-conductivity ratios increase up to values of about 1.18 for all temperatures. A comparison of the measurement results with the Hamilton-Crosser model and an analytical resistance model for the effective thermal conductivity of nanofluids shows that the former one allows for better predictions for the present nanofluids with a relatively large viscosity. In this context, it could be shown that detailed knowledge about the sphericity and thermal conductivity of the dispersed nanoparticles is required for the modeling approaches.

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Thermal conductivity and viscosity of glycerine-water based Cu-SiO2 hybrid nanofluids

Cited by 4 publications

References 18 publications

Unsteady Hiemenz Flow of Cu-SiO2 Hybrid Nanofluid with Heat Generation/Absorption

Unsteady Hiemenz Flow of Cu-SiO2 Hybrid Nanofluid with Heat Generation/Absorption

Analysis of the mechanism of enhanced heat transfer by nanofluids

Effective Thermal Conductivity of Nanofluids Containing Silicon Dioxide or Zirconium Dioxide Nanoparticles Dispersed in a Mixture of Water and Glycerol

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