Effect of Al2O3–Cu/water hybrid nanofluid in heat transfer

Suresh, S.; Venkitaraj, K.P.; Selvakumar, P.; Chandrasekar, M.

doi:10.1016/j.expthermflusci.2011.11.007

Cited by 777 publications

(239 citation statements)

References 21 publications

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“…and dimpled tube have own benefits of lower pressure drop, less cost, easy installation and removal (Chandrasekar et al 2010;Suresh et al 2012;Saeedinia et al 2012;Hashemi & Akhavan-Behabadi 2012;SyamSundar et al 2012;Akbaridoust et al 2013;Kannadasan et al 2012). For augmentation of heat transfer rate MWCNT is a promising candidate in specified base fluid because it has shear thinning behaviour at boundary layers so it increases the thermal conductivity which is solely contributes to heat transfer rate (Garg et al 2009;Amrollahi et al 2010;Liu & Liao 2010;Akhavan-Behabadi et al 2012;Wang et al 2013;Ashtiani et al 2012;Fakoor-Pakdaman et al 2013;Kumaresan et al 2012;Kumaresan et al 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Copper (Cu) and copper oxide (CuO) Suresh et al (2012) studied the convective heat transfer and friction factor characteristics of the plain and helically dimpled tube under turbulent flow using CuO/water nanofluid as working fluid. It was revealed that there was an appreciable growth in heat transfer rate with the use of nanofluids in a helically dimpled with negligible increase in friction factor compared to plain tube.…”

Section: Experimental Studies On Forced Convective Heat Transfer Of Nmentioning

confidence: 99%

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A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

Gupta

Arora

Kumar

et al. 2014

Int J Mech Mater Eng

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Nanofluids are suspension of nanoparticles (less than 100 nm) in the conventional base fluids. The dispersed solid metallic or non-metallic nanoparticles change the thermal properties like thermal conductivity, viscosity, specific heat, and density of the base fluid. Past studies focused on measuring the thermal properties of nanofluids. These suspended nanoparticles effectively improve the transport properties and heat transfer characteristics of the base fluids. Recently, heat transfer augmentation using suspensions of nanometre-sized solid particles in base liquids have been investigated by various research groups across the world. This paper reviews the state-of-the-art nanofluid studies in the area of forced convection heat transfer enhancement. The results for the heat transfer characteristics in internal flow with constant heat flux and constant wall temperature boundary conditions reported by various researchers have been compiled and reviewed. Further, in heat exchangers, the real boundary conditions are different from the constant heat flux and constant wall temperature boundary conditions. Over a span of 2 decades, the literature in this field is widespread; hence, this review would be useful for researchers to have a precise screening of a wide range of investigations in this area.

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Section: Discussionmentioning

confidence: 99%

Section: Experimental Studies On Forced Convective Heat Transfer Of Nmentioning

confidence: 99%

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

Gupta

Arora

Kumar

et al. 2014

Int J Mech Mater Eng

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“…(17) to (19), the residual function is obtained and by substituting the residual functions into Eqs. (32) to (35), a set of equations will be obtained; by solving these algebraic equations, coe cients c 1 -c 13 will be determined.…”

Section: Problem Formulationmentioning

confidence: 99%

“…Esfe et al [16] found an experimental correlation for Ag-MgO/water hybrid nano uid with the particle diameters of 40(MgO) and 25(Ag) nm and nanoparticle volume fraction range between 0% and 2%. Other researches dedicated to the use of hybrid nano uid in heat transfer are presented in [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Analytical study of Al2O3-Cu/water micropolar hybrid nanofluid in a porous channel with expanding/contracting walls in the presence of magnetic field

2017

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Abstract. Forced convection uid ow and heat transfer were investigated in a porous channel with expanding or contracting walls, which was lled with Al2O3-Cu/water micropolar hybrid nano uid in the presence of magnetic eld. In order to solve the governing equations analytically, the least square method was employed. The hot bottom wall was cooled by the coolant uid, which was injected into the channel from the top wall. The range of nanoparticles volume fraction (90% Al 2 O 3 and 10% Cu by volume) was between 0% and 2%. The e ects of consequential parameters such as Reynolds number, Hartmann number, micro rotation factor, and nanoparticles volume fraction on velocity and temperature pro les were examined. The results show that with increasing Reynolds number, the values of temperature and micro rotation pro les decrease. Furthermore, when the hybrid nano uid is used, compared to common nano uid, the heat transfer coe cient will increase signi cantly. It is also observed that when the Hartmann number increases, Nusselt number increases, too.

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“…Wang and Mujumdar, 5 Yu et al, 6 Sarkar et al, 7 Saidur et al, 8 Suresh et al, 9 and Hussien et al 10 presented an excellent review of the heat transfer characteristics of nanofluid in forced and free convection flows. Al-Kouz et al 11 investigated numerically the effect of dispersing nanoparticles of Al 2 O 3 to the lowpressure air flow inside a square cavity in which the hot wall is attached to two fins, and they concluded that dispersing such particles will enhance heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of heat transfer enhancement in the entrance region for low-pressure gaseous laminar pipe flows using Al₂O₃–air nanofluid

Al‐Kouz

Al-Waked

Sari

et al. 2018

Advances in Mechanical Engineering

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The gaseous low-pressure nanofluid flow of a steady-state two-dimensional laminar forced convection heat transfer in the entrance region of pipes is numerically investigated. Such flows are of interest for many engineering applications like the nuclear reactor and electronic equipment cooling, heat exchangers, and many others. Physical parameters considered in this study are Reynolds number (Re), Prandtl number (Pr), nanosolid particles volume fraction (f), Knudsen number (Kn), and the aspect ratio (AR). These parameters ranges are as follows: 500 Re 2000, 0:76 Pr 0:95, 0 f 0:5, 0 Kn 0:1, and 1 AR 10. The outcome of this study shows that by increasing Kn, velocity slip and temperature jump at the solid boundaries increase. In addition, heat transfer is enhanced by dispersing Al 2 O 3 nanoparticles in the base low-pressure gaseous flow. Results show that there is no effect of the nanoparticles volume fraction with values below 0.03 on the average Nusselt number. The average Nusselt number increases (Nu) as the value of the nanoparticles volume fraction exceeds 0.03. For instance, at Re = 1000, results show that when dispersing Al 2 O 3 nanosolid particles with volume fractions of 0.3 and 0.5; there is an enhancement in the average Nusselt number of 30.35% and 136.74%, respectively, when compared to the case of dispersing Al 2 O 3 nanosolid particles of 0.03 volume fraction.. Moreover, it is concluded that the average Nusselt number (Nu) depends directly on Reynolds (Re), Prandtl (Pr) numbers, and the nanoparticles volume fraction (f) and inversely on Knudsen number (Kn) and the aspect ratio (AR) for the investigated range of parameters considered in this study. Finally, a correlation of Nusselt number among all the investigated parameters in this study is proposed as Nu = 0:976AR

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Effect of Al2O3–Cu/water hybrid nanofluid in heat transfer

Cited by 777 publications

References 21 publications

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

Analytical study of Al2O3-Cu/water micropolar hybrid nanofluid in a porous channel with expanding/contracting walls in the presence of magnetic field

Numerical study of heat transfer enhancement in the entrance region for low-pressure gaseous laminar pipe flows using Al₂O₃–air nanofluid

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Effect of Al2O3–Cu/water hybrid nanofluid in heat transfer

Cited by 777 publications

References 21 publications

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

A comprehensive review of experimental investigations of forced convective heat transfer characteristics for various nanofluids

Analytical study of Al2O3-Cu/water micropolar hybrid nanofluid in a porous channel with expanding/contracting walls in the presence of magnetic field

Numerical study of heat transfer enhancement in the entrance region for low-pressure gaseous laminar pipe flows using Al2O3–air nanofluid

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Numerical study of heat transfer enhancement in the entrance region for low-pressure gaseous laminar pipe flows using Al₂O₃–air nanofluid