Cooling performance of a nanofluid flow in a heat sink microchannel with axial conduction effect

Izadi, Mohsen; Shahmardan, Mohammad Mohsen; Norouzi, M.; Rashidi, Alimorad; Behzadmehr, A.

doi:10.1007/s00339-014-8760-1

Cited by 56 publications

(15 citation statements)

References 32 publications

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“…It turns out that the thermal conductivity of non-metallic liquids (water, oil, ethylene glycol) is very low, and that the addition of metallic or metallic oxides nanometric particles which have a higher thermal conductivity in such liquids, therefore called nanofluid, could increase significantly the heat transfer by adjusting the thermal conductivity of the mixture. In this context, several researchers have been interested in the study of the intensification of convection heat transfer using nanofluids as working fluids, such as in references (Izadi et al , 2015; Izadi et al , 2018a; Izadi et al , 2018b; Mehryan et al , 2019a; Izadi et al , 2018c; Izadi et al , 2014).…”

Section: Introductionmentioning

confidence: 99%

Entropy generation analysis during MHD natural convection flow of hybrid nanofluid in a square cavity containing a corrugated conducting block

Tayebi

Chamkha

2019

HFF

178

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Purpose The purpose of this paper is to study the influence of magnetic field on entropy generation and natural convection inside an enclosure filled with a hybrid nanofluid and having a conducting wavy solid block. Also, the effect of fluid–solid thermal conductivity ratio is investigated. Design/methodology/approach The governing equations that are formulated in the dimensionless form are discretized via finite volume method. The velocity–pressure coupling is assured by the SIMPLE algorithm. Heat transfer balance is used to verify the convergence. The validation of the numerical results was performed by comparing qualitatively and quantitatively the results with previously published investigations. Findings The results indicate that the magnetic field and the conductivity ratio of the wavy solid block can significantly affect the dynamic and thermal field and, consequently, the heat transfer rate and entropy generation because of heat transfer, fluid friction and magnetic force. Originality/value To the best of the authors’ knowledge, the present numerical study is the first attempt to use hybrid nanofluid for studying the entropy generation because of magnetohydrodynamic natural convective flow in a square cavity with the presence of a wavy circular conductive cylinder. Irreversibilities due to magnetic effect are taken into account. The effect of fluid–solid thermal conductivity ratio is considered.

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Section: Introductionmentioning

confidence: 99%

Entropy generation analysis during MHD natural convection flow of hybrid nanofluid in a square cavity containing a corrugated conducting block

Tayebi

Chamkha

2019

HFF

178

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“…In this situation, some of MMMS 16,6 recent investigations on the applications of nanofluid flow through microchannel are shown in studies by. Izadi et al (2014);Ib añez et al (2016); Shashikumar et al (2017Shashikumar et al ( , 2018; L opez et al (2017); Madhu et al (2019aMadhu et al ( , 2019b and Ahmad Farooq et al (2019). The forced convection of a nanofluid flow in a microscale duct has been investigated numerically by Ib añez et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of micropolar nanofluid flow through an inclined microchannel with thermal radiation

Shashikumar

Madhu

Gireesha

et al. 2020

MMMS

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PurposeIn recent years, microfluidics has turned into a very important region of research because of its wide range of applications such as microheat exchanger, micromixers fuel cells, cooling systems for microelectronic devices, micropumps and microturbines. Therefore, in this paper, micropolar nanofluid flow through an inclined microchannel is numerically investigated in the presence of convective boundary conditions. Heat transport of fluid includes radiative heat, viscous and Joule heating phenomena.Design/methodology/approachGoverning equations are nondimensionalized by using suitable dimensionless variables. The relevant dimensionless ordinary differential systems are solved by using variational finite element method. Detailed computations are done for velocity, microrotation and temperature functions. The influence of various parameters on entropy generation and the Bejan number is displayed and discussed.FindingsIt is established that the entropy generation rate increased with both Grashof number and Eckert number, while it decreased with nanoparticle volume fraction and material parameter. Temperature is decreased by increasing the volume fraction of Ag nanoparticle dispersed in water.Originality/valueAccording to the literature survey and the best of the author’s knowledge, no similar studies have been executed on micropolar nanofluid flow through an inclined microchannel with effect of viscous dissipation, Joule heating and thermal radiation.

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“…This goal can be achieved through the use of nanofluids, which are prepared by suspending nanoparticles with sizes typically of 1-100 nm in conventional heat transfer fluids such as water, oil, and ethylene glycol [5][6][7][8]. This term was first suggested by Choi [9] in 1995, and it has since gained in popularity [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Impact of variable fluid properties on forced convection of Fe3O4/CNT/water hybrid nanofluid in a double-pipe mini-channel heat exchanger

Shahsavar

Godini

Talebizadehsardari

et al. 2019

J Therm Anal Calorim

135

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The objective of this study is to assess the hydrothermal performance of a non-Newtonian hybrid nanofluid with temperature-dependent thermal conductivity and viscosity compared with a Newtonian hybrid nanofluid with constant thermophysical properties. A counter-current doublepipe mini-channel heat exchanger is studied to analyze the effects of hybrid nanofluid. The nanofluid is employed as the coolant in the tube side while the hot water flows in the annulus side.Two different nanoparticles including Tetra Methyl Ammonium Hydroxide (TMAH) coated Fe3O4 (magnetite) nanoparticles and Gum Arabic (GA) coated Carbon Nanotubes (CNTs) are used to prepare the water based hybrid nanofluid. The results demonstrated that the non-Newtonian hybrid nanofluid always has a higher heat transfer rate, overall heat transfer coefficient, effectiveness, and performance index than those of the Newtonian hybrid nanofluid, while the opposite is true for pressure drop and pumping power. Supposing that the Fe3O4-CNT/water hybrid nanofluid is a Newtonian fluid with constant thermal conductivity and viscosity, leads to a large error in the

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Cooling performance of a nanofluid flow in a heat sink microchannel with axial conduction effect

Cited by 56 publications

References 32 publications

Entropy generation analysis during MHD natural convection flow of hybrid nanofluid in a square cavity containing a corrugated conducting block

Entropy generation analysis during MHD natural convection flow of hybrid nanofluid in a square cavity containing a corrugated conducting block

Finite element analysis of micropolar nanofluid flow through an inclined microchannel with thermal radiation

Impact of variable fluid properties on forced convection of Fe3O4/CNT/water hybrid nanofluid in a double-pipe mini-channel heat exchanger

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