Thermal Conductivity of Metal-Oxide Nanofluids: Particle Size Dependence and Effect of Laser Irradiation

Kim, Sang Hyun; Choi, Soo‐Jeong; Kim, Dongsik

doi:10.1115/1.2427071

Cited by 345 publications

(129 citation statements)

References 18 publications

Supporting

Mentioning

118

Contrasting

Unclassified

Order By: Relevance

“…The decrease in thermal conductivity with increasing nanoparticle size was also noted when studying other nanofluids [9][10][11][12]. In [13] it was asserted that the thermal conductivity coefficient increases linearly with decreasing particle size (the measurements were carried out in water-based nanofluid with nanoparticles of TiO2 and ZnO).…”

Section: Introductionmentioning

confidence: 96%

Thermal conductivity measurements of nanofluids

Pryazhnikov

Минаков

Rudyak

et al. 2017

International Journal of Heat and Mass Transfer

210

View full text Add to dashboard Cite

The paper presents the results of systematic measurements of the thermal conductivity coefficient of nanofluids at room temperature. In total, more than fifty various nanofluids based on water, ethylene glycol, and engine oil containing particles of SiO2, Al2O3, TiO2, ZrO2, CuO, and diamond were studied. The nanoparticles volume concentration ranged from 0.25 to 8% and the particles size ranged from 10 to 150 nm. It is shown that the thermal conductivity of nanofluids is not described by the classical theories (Maxwell's and so forth). The nanofluid thermal conductivity coefficient is a complicated function not only of the particle concentration, but also the particles size, their material, and type of base fluid. Measured thermal conductivity coefficients almost always exceed the values calculated by the Maxwell's formula, though nanofluids with sufficiently small particles may have thermal conductivity coefficients even lower than those predicted by the Maxwell theory. However, in all cases, the nanofluid thermal conductivity coefficient enhances with increasing particle size. It is convincingly shown that there is no direct correlation between the thermal conductivity of the nanoparticle material and the thermal conductivity of nanofluid containing these particles. The base liquid also significantly influences the effective thermal conductivity of the nanofluid. It has been confirmed that the lower the thermal conductivity of the base fluid, the higher the relative thermal conductivity coefficient of the nanofluid.

show abstract

Section: Introductionmentioning

confidence: 96%

Thermal conductivity measurements of nanofluids

Pryazhnikov

Минаков

Rudyak

et al. 2017

International Journal of Heat and Mass Transfer

210

View full text Add to dashboard Cite

show abstract

“…E-mail: seshim@inha.ac.kr conductivity of water and ethylene glycol containing boron nitride (BN), zinc oxide (ZnO), and titanium dioxide. 7 Kou et al explored the effect of the particle size of BN on the thermal conductivity of silicone rubber. The thermal conductivity of the prepared composites was improved with BN particles with a smaller diameter at the same volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Thermal Conductivity of Poly(dimethyl siloxane) Composites Filled with Boron Nitride and Carbon Nanotubes

Ha¹,

Hong²,

Kim³

et al. 2013

Polymer Korea

View full text Add to dashboard Cite

In order to enhance the thermal conductivity of poly(dimethyl siloxane) (PDMS), boron nitride (BN) and carbon nanotubes (CNTs) were incorporated as the thermally conductive fillers. The amount of BN was increased from 0 to 100 phr (parts per hundred rubber) and the amount of CNTs was increased from 0 to 4 phr at a fixed amount of the boron nitride (100 phr). The thermal conductivity of the composites increased with an increasing concentration of BN, but the incorporation of CNTs had only a slight effect on the enhancement of thermal conductivity. Unexpectedly, the thermal degradation of the composites was accelerated by the addition of CNTs in 100 phr BN filled PDMS. Activation energy for thermal decomposition of the composites was calculated using the Horowitz-Metzger method. The curing behavior, electrical resistivity, and mechanical properties of PDMS filled with BN and CNTs were investigated.

show abstract

“…At low concentrations, the slope was greater than at high concentrations. Most thermal conductivity data in the literature for Al 2 O 3 -water nanofluids showed that with increasing nanoparticle volume concentration, the thermal conductivity also increased [21][22][23][24][25][26][27][28][29][30], however, the intensity of the increase decreased for the larger volume concentrations.…”

Section: Effect Of Volume Concentrationmentioning

confidence: 99%