Heat transfer enhancement of nanofluids

Xuan, Yimin; Li, Qiang

doi:10.1016/s0142-727x(99)00067-3

Cited by 2,211 publications

(891 citation statements)

References 10 publications

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“…Knowing the fact that solids have higher thermal conductivity compared to liquids, the suspended particles can change the transport and thermal properties of the base fluids. Various types of nanoparticles (metals and oxides), such as aluminium oxide (Al 2 O 3 ), titanium oxide (TiO 2 ), copper oxide (CuO), copper (Cu), silver (Ag), gold (Au), silica nanoparticles and carbon nanotubes (CNT) have been used [1][2] to enhance the thermal characteristics of the base fluids (water, ethylene glycol, propylene glycol, acetone, transformer oil, etc.). Special requirements for preparation of nanofluids include low sedimentation, even and durable suspension, stable, low agglomeration and no chemical change [2].…”

Section: Introductionmentioning

confidence: 99%

“…Various types of nanoparticles (metals and oxides), such as aluminium oxide (Al 2 O 3 ), titanium oxide (TiO 2 ), copper oxide (CuO), copper (Cu), silver (Ag), gold (Au), silica nanoparticles and carbon nanotubes (CNT) have been used [1][2] to enhance the thermal characteristics of the base fluids (water, ethylene glycol, propylene glycol, acetone, transformer oil, etc.). Special requirements for preparation of nanofluids include low sedimentation, even and durable suspension, stable, low agglomeration and no chemical change [2]. The thermal conductivity of nanofluids containing CNT was measured by Choi et al [3] and Xie et al [4] for different base fluids.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

Rashmi

Ismail

Sopyan

et al. 2011

Journal of Experimental Nanoscience

117

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

Rashmi

Ismail

Sopyan

et al. 2011

Journal of Experimental Nanoscience

117

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“…Figure 5b shows Nu as a function of flow rate at the nanoparticle volume fraction of 1 % in both experimental (previous work) and CFD (current work), with maximum difference between the experiment and numerical results of 9 %. The difference could be caused by some factors such as particle size, which effect on the viscosity, temperature dependant properties and the Brownian motion of the particles which effect on the thermal conductivity [38][39][40]. Comparison between the experimental Nu from [28] and the predicted Nu from [37].…”

Section: 2-validation Of the Cfd Modellingmentioning

confidence: 99%

CFD assessment of the effect of nanoparticles on the heat transfer properties of acetone/ZnBr2 solution

Mohammed

Giddings

Walker

et al. 2018

Applied Thermal Engineering

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“…Xuan and Li [4], studied the augmentation of thermal conductivity of Cu-water nanofluid for different volume fractions of Cu nanoparticles. Xuan and Roetzel [5], concluded from their findings that the heat transfer enhancement is due to the increase of thermal conductivity and to thermal dispersion which is caused by random motion of the particles that coupled with enhanced thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Heat Transfer Enhancement and Flow with Cu, TiO2 Ethylene Glycol Distilled Water Nanofluid in Spiral Coil Heat

Sultan

2017

Tikrit j. eng. sci.

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Nanofluid ethylene glycol enhancement metallic nano metallic A R T I C L E I N F O A B S T R A C TThis experimental investigation was performed to improve heat transfer in the heat exchanger (tube of shell and helically coiled (using nanoparticles for turbulent parallel flow and counter flow of distilled water (Dw) and ethylene glycol (EG) fluids. Six types of nanofluids have been used namely: copper -distilled water, copper -distilled water and ethylene glycol, copper -ethylene glycol, titanium oxide -distilled water, titanium oxide -distilled water and ethylene glycol, titanium oxide -ethylene glycol with 0.5%,1%,2%,3% and 5% volume concentration as well as the range of Reynolds number are 4000 -15000. The experimental results reveal that an increase in coefficient of heat transfer of 50.2 % to Cu -Dw, 41.5% to Cu -( EG + Dw ), 32.12 % for Cu -EG , 36.5% for TiO2 -Dw, 30.2 % to TiO2 -( EG + Dw) and 25.5%, to TiO2 -EG . The strong nanoconvection currents and good mixing caused by the presence of Cu and TiO2 nanoparticles. The metal nanofluids give more improvement than oxide nanofluids. The shear stress of nanofluids increases with concentration of nanoparticles in the case of parallel and counter flow. The effect of flow direction is insignificant on coefficient of overall heat transfer and the nanofluids behave as the Newtonian fluid for 0.5%,1%,2%,3% and 5%. Good assent between the practical data and analytical prediction to nanofluids friction factor which means the nanofluid endure pump power with no penalty. This study reveals that the thermal performance from nanofluid Cu -Dw is higher than Cu -(EG + Dw) and Cu -EG due to higher thermal conductivity for the copper and distilled water compared with ethylene glycol.

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Heat transfer enhancement of nanofluids

Cited by 2,211 publications

References 10 publications

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

Stability and thermal conductivity enhancement of carbon nanotube nanofluid using gum arabic

CFD assessment of the effect of nanoparticles on the heat transfer properties of acetone/ZnBr2 solution

Experimental Analysis of Heat Transfer Enhancement and Flow with Cu, TiO2 Ethylene Glycol Distilled Water Nanofluid in Spiral Coil Heat

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