Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

Anwar, Muhammad Shoaib; Ahmed, Hussain Tariq; Adnan, Ahmad Shoukat; Ali, Hafız Muhammad; Ali, Hassan

doi:10.2298/tsci180722022a

Cited by 24 publications

(13 citation statements)

References 47 publications

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“…The increase of thermal conductivity enhances the convective heat transfer coefficient of nanofluids, but the increase of viscosity increases the thickness of thermal boundary layer and hinders the convective heat transfer of magnetic nanofluids. When the concentration of nanoparticles increases to a certain extent, the particles agglomerate, leading to the increase of the thickness of the boundary layer, and even adsorb on the wall of the tube [17]. Therefore, when the volume concentration is between 0.5% and 2%, the convective heat transfer coefficient of magnetic nanofluids increases with the increase of concentration, which is caused by the increase of thermal conductivity.…”

Section: Effect Of Concentration On Heat Transfer Coefficient Of Magnetic Nanofluidsmentioning

confidence: 99%

Research on convective heat transfer characteristics of Fe3O4 magnetic nanofluids under vertical magnetic field

et al. 2022

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This paper focuses on the convective heat transfer characteristics of Fe3O4 /Water magnetic nanofluids under laminar and turbulent conditions. After verifying the accuracy of the experimental apparatus, the effects of magnetic field strength, concentration, Reynolds number and temperature on the convective heat transfer coefficient have been studied. The convective heat transfer characteristics of nanofluids under laminar and turbulent flow conditions were studied in depth, and the influence of each factor on the heat transfer coefficient was analyzed by orthogonal experimental design method. Under the laminar flow conditions, the convective heat transfer of magnetic nanofluids performed best when the Reynolds number was 2000, the magnetic field strength was 600, the temperature was 30? and the concentration was 2%. And the convective heat transfer coefficient (h) increased by 3.96% than the distilled water in the same conditions. In turbulent state, the convective heat transfer of magnetic nanofluids performed the best when the Re was 6000, the magnetic field strength was 600, the temperature was 40? and the concentration was 2%. The h increased by 11.31% than the distilled water in the same Reynolds number and the magnetic field strength conditions.

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Section: Effect Of Concentration On Heat Transfer Coefficient Of Magnetic Nanofluidsmentioning

confidence: 99%

Research on convective heat transfer characteristics of Fe3O4 magnetic nanofluids under vertical magnetic field

et al. 2022

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“…As previously mentioned, many factors increase the pressure drop, and the use of fins with nanofluids becomes effective on the pressure drop of different types of channels. Anwar et al [94] estimated the lowest pressure drop by utilising CuO/water nanofluids with 100 Pa for 1.5 mm fin spacing heat sink, and the maximum value is 7240 Pa for 0.2 mm fin spacing. The percentage difference of pressure drop ranges from 2.2% to 13.1% for CuO/water nanofluids and water for various fin spacing heat sinks.…”

Section: Pressure Dropmentioning

confidence: 99%

Thermal and Hydraulic Performance of CuO/Water Nanofluids: A Review

et al. 2020

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This paper discusses the behaviour of different thermophysical properties of CuO water-based nanofluids, including the thermal and hydraulic performance and pumping power. Different experimental and theoretical studies that investigated each property of CuO/water in terms of thermal and fluid mechanics are reviewed. Classical theories cannot describe the thermal conductivity and viscosity. The concentration, material, and size of nanoparticles have important roles in the heat transfer coefficient of CuO/water nanofluids. Thermal conductivity increases with large particle size, whereas viscosity increases with small particle size. The Nusselt number depends on the flow rate and volume fraction of nanoparticles. The causes for these behaviour are discussed. The magnitude of heat transfer rate is influenced by the use of CuO/water nanofluids. The use of CuO/water nanofluids has many issues and challenges that need to be classified through additional studies.

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“…And for geometrically decreasing of twist pitch and channel length leads to decrease the convective thermal resistance and thus improves the Nusselt number as the Reynolds number increased. For microprocessor cooling application, Anwar et al (2019) studied numerically the heat transfer using CuO-H 2 O nano-fluids with volumetric concentration of 1.5% through minichannel heat sinks with different fin spacing (0.2 mm, 0.5 mm, 1 mm and 1.5 mm). They found the minimum base temperature of chip to be 36.8 °C for 0.2 mm fin-spacing heat sink.…”

Section: Introductionmentioning

confidence: 99%

A numerical comparison of circular and corrugation heat sink for laminar CuO–water nano-fluid flow and heat transfer enhancement

2021

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Since the high heat has a bad effect on every electric coolant device performance in small spaces, enhance thermal systems became a challenge to achieve better performance. In the present study, investigate the forced heat transfer and laminar CuOwater nanofluid flow around the sinusoidal cylindrical and cylindrical heat sink, at Reynold number less than 700, and at a constant heat flux. Which is simulated numerically by Galerkin approach finite element methods FEM. The main purpose of the study is to drop the heat spam by enhancing the heat transfer coefficient of laminar flow in different channel types of special shape (corrugate cross-section) using nanofluid. Study the effect of hydraulic diameter of sinusoidal cylindrical to classify the channels depended on (D h ≤ 3 mm). The new design of heat sink is employed "sinusoidal cylindrical heat sink" varied according to the amplitude values (λ) and the corrugation number (G). A digest of the findings, the best enhance at φ = 0.15%vol of 16.31% and 16.53% for G = 3 and G = 10, respectively. A great drop in wall temperature about 20.47 and 16.58 for λ = 20 of G = 3, and G = 10, respectively, as the volume fraction of CuO-water nanofluid increased at Re = 478 & q″ = 127.3 kW/m 2 , comparing with water. In conclusion, the sinusoidal heat sink of λ = 20 with CuO-H 2 O nanofluid of φ = 0.15%vol showed best enhance in heat transfer coefficient. Increased the corrugate number G led to a decrease in the friction factor and thermal resistance. Furthermore, using nanofluid led to reduce the surface wall temperature, the friction factor also the thermal resistance. KeywordsMini-channel heat sinks • Nanofluid • Forced heat transfer • Corrugation circular cylinder • Laminar flow • Finite element methods Abbreviations 3D Three-dimensional. 2D Two-dimensional * Farooq H. Ali

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Numerical study for heat transfer enhancement using CuO water nanofluids through mini-channel heat sinks for microprocessor cooling

Cited by 24 publications

References 47 publications

Research on convective heat transfer characteristics of Fe3O4 magnetic nanofluids under vertical magnetic field

Research on convective heat transfer characteristics of Fe3O4 magnetic nanofluids under vertical magnetic field

Thermal and Hydraulic Performance of CuO/Water Nanofluids: A Review

A numerical comparison of circular and corrugation heat sink for laminar CuO–water nano-fluid flow and heat transfer enhancement

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