Fluid Flow and Entropy Generation Analysis of Al2O3–Water Nanofluid in Microchannel Plate Fin Heat Sinks

Ma, Hao; Duan, Zhipeng; Su, Liangbin; Ning, Xiaoru; Bai, Junhong; Lv, Xianghui

doi:10.3390/e21080739

Cited by 19 publications

(13 citation statements)

References 86 publications

(125 reference statements)

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“…Ma et al 59 studied the 3D laminar flow characteristics of DW and Al 2 O 3 ‐water nanofluid through microchannel plate‐fin heat sinks. They examined the influence of nanoparticle volume fraction (0.5% < ϕ < 5%), channel aspect ratio (0 < ε < 1), and Reynolds number (100 < Re < 1000) on entropy generation and pressure drop.…”

Section: Nanofluid Transport Under Laminar Flow Regimementioning

confidence: 99%

Advances of nanofluids in heat exchangers—A review

Menni

Chamkha

Ameur³

2020

Heat Trans

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Recently, many researchers have focused on their studies on the analysis of nanofluid flows due to their participation in the enhancement of heat transfer rates in industrial processes. The ordinary fluids, such as water, mineral oils, and so on, are known for their low thermal conductivity in heat transfer processes. A significant enhancement in the thermal properties of ordinary fluid may be obtained by adding nanoparticles having a diameter of less than 100 nm or suspension of fibers. Better spreading, wetting, dispersion, and stability and with acceptable viscosity are the main advantageous properties of nanofluids on a solid surface. The nanofluids are encountered in various thermal engineering systems such as in heat exchangers, refrigeration, thermal management of fuel cells, cooling of nuclear reactors, microelectromechanical systems, and others. In particular, the thermal conversion is known as a great application of nanotechnology, and many studies have been achieved with such fluids in heat exchangers. Therefore, this paper aims to present a global insight into the different applications of nanofluids in various heat exchangers, that is, heat pipe and plate-fin heat exchangers. All research works have been summarized into three main parts: laminar, transition, and turbulent nanofluid flow regimes.

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Section: Nanofluid Transport Under Laminar Flow Regimementioning

confidence: 99%

Advances of nanofluids in heat exchangers—A review

Menni

Chamkha

Ameur³

2020

Heat Trans

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“…The reliability and performance of electronic chips and batteries are significantly affected by their operating temperature [42][43][44]. Determining accurately of the temperature distribution and analyzing the influence of aspect ratio on temperature distribution are critically paramount for designing an effective cooling scheme of the thermal management for electronic applications and electric vehicle applications.…”

Section: Resultsmentioning

confidence: 99%

Heat conduction in rectangular solids with internal heat generation

Duan

2021

THERM SCI

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A representative steady-state heat conduction problem in rectangular solids with uniformly distributed heat generation has been investigated analytically. An analytical solution is provided by solving a nonhomogeneous partial differential equation. A simple and accurate model is proposed to predict the dimensionless shape factor parameter for the first time. The dimensionless shape factor is obtained in the light of the solution of Poisson equation with constant wall temperature boundary conditions. The area-mean temperature is found by integration on the rectangular cross-section. The model is very concise and nice for quick real world approximations, and it provides acceptable accuracy for engineering practice.

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“…The flow pattern and heat transfer characteristics around and through a porous cylinder immersed in a free stream have attained great academic significance and attracted extensive attention owing to the wide engineering applications [ 1 ]. Such transport processes commonly appear in heat exchangers, cooling and heating for food, nuclear biological chemical equipment, catalytic chemical reactors, metal melting and solidification, flow through and around microchannels, as well as electronic components [ 2 , 3 , 4 ]. Porous material exhibits its potential for the augmentation in the heat transfer rate due to the high effective thermal conductivity [ 5 ] and its specific structure of increasing the heat transfer area between the solid and fluid regions [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Prandtl Number on Mixed Convective Heat Transfer from a Porous Cylinder in the Steady Flow Regime

Tang

2020

Entropy

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The effect of the Prandtl number (Pr) on the flow and heat transfer from a porous circular cylinder with internal heat generation in the mixed convection regime is numerically investigated. The steady flow regime is considered over the ranges of the Reynolds number (Re), Darcy number (Da), and Richardson number (Ri), varying from 5 to 40, 10−6 to 10−2, and 0 to 2, respectively. The wake structure, the temperature distribution, and the heat transfer rate are discussed. Besides precipitating the growth of the recirculating wake, the Prandtl number is found to have a significant impact on the thermal characteristics. The concave isotherms, resembling a saddle-shaped structure, occur behind the cylinder at larger Pr, resulting in swells of the isotherms pairing off at the lateral sides. These swells are found to have a negative effect on heat transfer owing to a relatively smaller temperature gradient there. Then, the heat transfer rate in terms of the local Nusselt number (Nu) and enhancement ratio (Er) is calculated, which is closely related to Pr, Re, Da, and Ri. The local minimum heat transfer rate along the cylinder surface is found at the position where the swells of the isotherms form.

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Fluid Flow and Entropy Generation Analysis of Al2O3–Water Nanofluid in Microchannel Plate Fin Heat Sinks

Cited by 19 publications

References 86 publications

Advances of nanofluids in heat exchangers—A review

Advances of nanofluids in heat exchangers—A review

Heat conduction in rectangular solids with internal heat generation

Effect of Prandtl Number on Mixed Convective Heat Transfer from a Porous Cylinder in the Steady Flow Regime

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