Fluid flow and heat transfer of nanofluids in microchannel heat sink with V-type inlet/outlet arrangement

Abdollahi, Ayoub; Mohammed, Hussein A.; Vanaki, Shayan Mokhtarpour; Osia, A.; Haghighi, M. R. Golbahar

doi:10.1016/j.aej.2016.09.019

Cited by 59 publications

(29 citation statements)

References 40 publications

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“…From the heat transfer analysis, SiO2 has the higher heat transfer rate compairing with other nanofluids tested. Also analysing the pressure drop profile Ag has the least pressure drop Ayoub [9] et al Numerically studied in a micro channel heat sink with V-type inlet/outlet arrangement on the fluid flow and heat transfer characteristics based on laminar nanofluid flow. In this study he used different nanofluids such as SiO2, Al2O3, ZnO, and CuO with water having different volume fractions of (0,1,1.5 &2%) with various diameters ranging with 30,40,60 nm.…”

Section: B Properties Of Selected Nanoparticles With Different Volummentioning

confidence: 99%

“…NANOFLUIDS THERMO-PHYSICAL PROPERTIES The thermophysical properties such as density, specific heat, thermal conductivity and viscosity of the base fluid LN2 [13] and nanoparticles Al2O3, CuO, Fe3O4 and ZnO [6], [9], [16] are taken from base journals. Also the effective thermal conductivity of the nanofluid is calculated from the Maxwell theoretical model [18].…”

Section: B Governing Equationsmentioning

confidence: 99%

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Heat Transfer and Fluid Flow Analysis of Cryogen based Nanofluids in a Micro-Heat Exchanger

Vijayan¹

2018

IJRASET

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Miniaturization of equipments has lead to an increase in requirement of an effective system to transfer and dissipate heat from a working system, due to the high heat flux that possess. Because of low thermal conductivity and specific heat the heat dissipation is poor in traditional fluids. Thus these traditional fluids are replaced with nanofluids. . There are various studies regarding with their anomalous and unique thermal transport properties. Thus these studies has expanded the field of nanofluids into an unexplored field of cryogenic nanofluids. In this work heat transfer and pressure drop analysis of different cryogen based nanofluids are analysed with different volume fractions(1%-5%). Because of the small size of micro heat exchanger, the heating is more in them. cryogenic base fluid LN2 along with CuO,Al2O3,ZnO,Fe3O4 as nanoparticles are focused on this numerical study. This work aims to investigate what's the impact on heat transfer rate and pressure drop at different volume fractions along with different combinations of cryogenic nanofluids, inorder to enhance the choices of both base fluid and nanoparticles. For this a computational investigation is carried out in 3-D geometry developed in ANSYS 17 and further analysis is done using FLUENT for steady turbulent developing flow.

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Section: B Properties Of Selected Nanoparticles With Different Volummentioning

confidence: 99%

Section: B Governing Equationsmentioning

confidence: 99%

Heat Transfer and Fluid Flow Analysis of Cryogen based Nanofluids in a Micro-Heat Exchanger

Vijayan¹

2018

IJRASET

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“…Abdollahi et al [27] completed a series of experiments to investigate the heat transfer specifications of various nanofluids inside a micro-channel, with a V-shaped inlet and outlet arrangement. They found that silica nanofluid could potentially have the highest heat transfer rate compared to alumina, copper oxide, and ZnO nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Thermal Assessment of Nano-Particulate Graphene-Water/Ethylene Glycol (WEG 60:40) Nano-Suspension in a Compact Heat Exchanger

et al. 2019

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In the present study, we report the results of the experiments conducted on the convective heat transfer of graphene nano-platelets dispersed in water-ethylene glycol. The graphene nano-suspension was employed as a coolant inside a micro-channel and heat-transfer coefficient (HTC) and pressure drop (PD) values of the system were reported at different operating conditions. The results demonstrated that the use of graphene nano-platelets can potentially augment the thermal conductivity of the working fluid by 32.1% (at wt. % = 0.3 at 60 °C). Likewise, GNP nano-suspension promoted the Brownian motion and thermophoresis effect, such that for the tests conducted within the mass fractions of 0.1%–0.3%, the HTC of the system was improved. However, a trade-off was identified between the PD value and the HTC. By assessing the thermal performance evaluation criteria (TPEC) of the system, it was identified that the thermal performance of the system increased by 21% despite a 12.1% augmentation in the PD value. Furthermore, with an increment in the fluid flow and heat-flux applied to the micro-channel, the HTC was augmented, showing the potential of the nano-suspension to be utilized in high heat-flux thermal applications.

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“…The results indicate that the increase in nanoparticles’ volume fraction and the decrease in the nanoparticle diameter would increase the Nusselt number value, and the friction factor does not change significantly by using nanofluids with different volume fractions and different nanoparticle diameters. The fluid flow and heat transfer characteristics of laminar nanofluids’ flow in microchannel heat sink with V‐type inlet/outlet arrangement were numerically studied by Abdollahi et al The results specified that increasing the nanoparticle volume fraction together with decreasing the nanoparticle diameter enhanced the Nusselt number value. SiO 2 nanofluids with a volume fraction of 2% and a nanoparticle diameter of 30 nm had the best performance among other tested nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of hydrodynamic and heat transfer performances of nanofluids in a fractal microchannel heat sink

Yan

2019

Heat Trans. Asian Res.

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Heat transfer and hydrodynamic performances for nanofluids, Al2O3‐water and SiO2‐water, are numerically investigated with different nanoparticles’ volume fractions and the initial velocities in a fractal microchannel heat sink. The fractal microchannel is 100 μm × 100 μm in the inlet cross‐section, and the length at the 0th level is 2000 μm. A constant heat flux of 500 kW/m2 was applied to the bottom wall of the fractal microchannel heat sink. The heat transfer and hydrodynamic performances of different cases are discussed in terms of the mean heat transfer coefficient, mean base temperature, pressure loss, thermal resistance, friction factor f/f0, and COP/COP0. Results indicate that increasing the initial velocity and nanoparticles’ volume fraction lead to an enhanced heat transfer at the expense of pressure loss. Al2O3‐water has a higher mean heat transfer coefficient and pressure drop than that of SiO2‐water, a lower f/f0, mean base temperature, thermal resistance, and COP/COP0. Ultimately, as compared to pure water, the heat transfer coefficients of 4% Al2O3‐water increased by 7.53%, 7.80%, 8.00%, 8.14%, 8.16%, and 8.30%, and the pressure drops increased by 32.09%, 31.41%, 30.81%, 30.05%, 29.21%, and 28.58%, respectively, corresponding to the initial velocities by 4, 5, 6, 7, 8 and 9 m/s.

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Fluid flow and heat transfer of nanofluids in microchannel heat sink with V-type inlet/outlet arrangement

Cited by 59 publications

References 40 publications

Heat Transfer and Fluid Flow Analysis of Cryogen based Nanofluids in a Micro-Heat Exchanger

Heat Transfer and Fluid Flow Analysis of Cryogen based Nanofluids in a Micro-Heat Exchanger

Thermal Assessment of Nano-Particulate Graphene-Water/Ethylene Glycol (WEG 60:40) Nano-Suspension in a Compact Heat Exchanger

Numerical investigation of hydrodynamic and heat transfer performances of nanofluids in a fractal microchannel heat sink

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