Thermophysical properties of Al2O3-CuO hybrid nanofluid at different nanoparticle mixture ratio: An experimental approach

Wanatasanappan, V. Vicki; Abdullah, M. Z.; Gunnasegaran, Prem

doi:10.1016/j.molliq.2020.113458

Cited by 64 publications

(12 citation statements)

References 29 publications

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“…Copper (Cu) and alumina (Al 2 O 3 ) nanoparticles are inexpensive and commonly used in many heat transfer applications and studies. [26,27] Suresh et al experimentally determined that the effective thermal conductivity of the Cu-Al 2 O 3 hybrid nanofluids is higher than that of water and Al 2 O 3 nanofluids. The effective thermal conductivity enhancement of the Cu-Al 2 O 3 hybrid nanofluid can be up to 12% compared with water.…”

Section: Introductionmentioning

confidence: 99%

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

et al. 2021

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Herein, a novel coalescence–jumping phase transition thermal diode using hybrid nanofluids, an emerging thermal fluid with proven supreme thermal properties, is first proposed and investigated. The thermal rectification enhancement mechanism is investigated by the evaporation performances of a working fluid‐filled superhydrophilic porous tank. Furthermore, a developed mathematical model is well‐matched with the experimental results in terms of the heat transfer and thermal rectification performance of the thermal diodes using hybrid nanofluids. It is worth noting that increasing the volume fraction of the hybrid nanofluids does not necessarily improve the thermal rectification performance of the thermal diodes due to the aggregative nanoparticle deposition on the evaporation surface. In addition, there is a need to balance the thermal conductivity (higher copper proportion) and stability (higher alumina proportion) of the hybrid nanofluids used in the thermal diodes for long‐term operation. The experimental results show that the thermal rectification performance of the thermal diode using Cu‐Al2O3 hybrid nanofluid can be increased to 637.4, showing a nearly 300% improvement compared with the thermal diode using water. Overall, the remarkable results in this study promote the applications and studies of thermal diodes using hybrid nanofluids in various engineering systems for thermal management.

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Section: Introductionmentioning

confidence: 99%

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

et al. 2021

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“…Wanatasanappan et al [ 74 ] measured the thermal conductivity and viscosity of Al 2 O 3 : CuO water/EG hybrid nanofluids using different ratios of Al 2 O 3 and CuO nanoparticles. The measurements were made across a range of temperatures from 30 to 70 °C using a KD2 Pro thermal analyzer for thermal conductivity and a Brookfield Rheometer for viscosity.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in viscosity as the temperature increases is due do a weakening of the intermolecular forces between the nanoparticles and the base fluid. In Figure 35 , the measurements [ 74 ] for thermal conductivity and viscosity of hybrid nanofluids with a 20:80 and 60:40 ratio of Al 2 O 3 : CuO are compared to measurements [ 19 ] for Al 2 O 3 nanofluids and measurements [ 38 , 63 ] for CuO nanofluids. All the nanofluids in Figure 35 are at a volume fraction of 1% and in a base fluid of 40% ethylene glycol and 60% water.…”

Section: Resultsmentioning

confidence: 99%

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Thermal Conductivity and Viscosity: Review and Optimization of Effects of Nanoparticles

et al. 2021

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This review was focused on expressing the effects of base liquid, temperature, possible surfactant, concentration and characteristics of nanoparticles including size, shape and material on thermal conductivity and viscosity of nanofluids. An increase in nanoparticle concentration can lead to an increase in thermal conductivity and viscosity and an increase in nanoparticle size, can increase or decrease thermal conductivity, while an increase in nanoparticle size decreases the viscosity of the nanofluid. The addition of surfactants at low concentrations can increase thermal conductivity, but at high concentrations, surfactants help to reduce thermal conductivity of the nanofluid. The addition of surfactants can decrease the nanofluid viscosity. Increasing the temperature, increased the thermal conductivity of a nanofluid, while decreasing its viscosity. Additionally, the effects of material of nanoparticles on the thermal conductivity and viscosity of a nanofluid need further investigations. In the case of hybrid nanofluids, it was observed that nanofluids with two different particles have the same trend of behavior as nanofluids with single particles in the regard to changes in temperature and concentration. Additionally, the level of accuracy of existing theoretical models for thermal conductivity and viscosity of nanofluids was examined.

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“…To inexpensive and commonly used in many heat transfer applications and studies. [26,27] Suresh et al…”

Section: Introductionmentioning

confidence: 99%

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

et al. 2022

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Thermophysical properties of Al2O3-CuO hybrid nanofluid at different nanoparticle mixture ratio: An experimental approach

Cited by 64 publications

References 29 publications

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

Thermal Conductivity and Viscosity: Review and Optimization of Effects of Nanoparticles

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

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Thermophysical properties of Al2O3-CuO hybrid nanofluid at different nanoparticle mixture ratio: An experimental approach

Cited by 64 publications

References 29 publications

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al2O3 Hybrid Nanofluids

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al2O3 Hybrid Nanofluids

Thermal Conductivity and Viscosity: Review and Optimization of Effects of Nanoparticles

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al2O3 Hybrid Nanofluids

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Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids

Thermal Rectification Enhancement of Coalescence–Jumping Phase Transition Thermal Diodes using Cu–Al₂O₃ Hybrid Nanofluids