Effects of heat source and sink on entropy generation and MHD natural convection of Al 2 O 3 -Cu/water hybrid nanofluid filled with square porous cavity

Mansour, M. A.; Siddiqa, Sadia; Gorla, Rama Subba Reddy; Rashad, A. M.

doi:10.1016/j.tsep.2017.10.014

Cited by 164 publications

(61 citation statements)

References 17 publications

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“…T A B L E 1 Thermophysical properties of hybrid nanofluid 3,20,31 Properties Nanofluid Hybrid nanofluid Using the definitions obtained for the thermal flux and temperature in Equations (6) and (7) and their placement in Equation (5), the energy equation is defined as follows:…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…Following the mentioned impact, considerable studies have been carried out in these fields. Entropy generation and magnetohydrodynamic (MHD) natural convection stream of Al 2 O 3 -Cu/H 2 O hybrid nanoliquid the under the impact of a heat source sink on a square porous hole have been investigated by Mansour et al 3 MHD boundary layer flow of Cu-H 2 O and Ag-H 2 O nanoliquid over a rotating disc through the spongy medium with chemical reaction is studied by Reddy et al 4 via the finite element method. Shaiq et al 5 analyzed the impacts of thermal deposition, nonlinear thermal ray and inward heat generation on (SiO 2 -MoS 2 ) hybrid nanoparticles suspended in (C 3 H 8 O 2 ) base liquid upon a stretching plate by the Runge-Kutta-Fehlberg (RKF) method.…”

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confidence: 99%

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A numerical approach for MHD Al₂O₃–TiO₂/H₂O hybrid nanofluids over a stretching cylinder under the impact of shape factor

Ghobadi

Hassankolaei

2019

Heat Trans. Asian Res.

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In this research, the heat transfer and magnetohydrodynamic stagnation point flow of a (Al 2 O 3 -TiO 2 /H 2 O) hybrid nanofluid past a stretching cylinder under the impact of heat generation, nonlinear thermal radiation, and nanoparticles shape factor has been analyzed using the Runge-Kutta-Fehlberg fifth order numerically method. The impact of changing diverse parameters, such as nanoparticles shape factor, named hexahedron and lamina, on temperature and velocity profiles and induced magnetic field, has been explored. The main motivation of this article is using hybrid nanoparticles to improve heat transfer. The novel findings of the current research illustrate that the Lorentz force produced by increasing magnetic field parameter (M) causes a decline in velocity profile; also increasing solar radiation, shape factor and the use of hybrid nanoparticles caused increment in the temperature profile. Furthermore, the lamina nanoparticle shape has more impact on Nusselt number (Nu) compared with hexahedron-shaped nanoparticle.

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Section: Mathematical Formulationmentioning

confidence: 99%

mentioning

confidence: 99%

A numerical approach for MHD Al₂O₃–TiO₂/H₂O hybrid nanofluids over a stretching cylinder under the impact of shape factor

Ghobadi

Hassankolaei

2019

Heat Trans. Asian Res.

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“…The obtained results show that an insertion of nanoparticles leads to an attenuation of convective flow while the average Nusselt number increases with the solid volume fraction of nanoparticles. Mansour et al [10] focused on the entropy generation and MHD natural convection in a porous cavity filled with the Cu-Al2O3-water hybrid nanofluid. An isothermal heat source is located on the upper and lower sides of the cavity and a heat sink are located on its sidewalls.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection and Thermal Radiation Influence on Nanofluids in a Cubical Cavity

Moutaouakil¹,

Boukendil²,

Zrikem³

et al. 2020

IJHT

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This study investigates the effect of thermal radiation on natural convection of several water-based nanofluids H2O-(Cu, Al2O3, Ag, TiO2) in a partially heated cubical cavity where the left vertical side is heated by three identical and parallel elements. The right vertical side is totally cooled, and the other ones are kept adiabatic. A developed code based on the finite volume method and the Rosseland approximation is used to solve the governing equations. Calculations were performed for three inclination angles of the rectangular heating elements 0°, 45° and 90°. The effect of governing parameters, namely, Rayleigh number, solid volume fraction, radiation parameter, dimensionless spacing of the three heating elements, their aspect ratio and different type of nanoparticles on the velocity contours, isotherms as well as local and average Nusselt number were considered. The results indicate that the inclination angle has a considerable effect on the dynamic and thermal fields, but its effect on the average heat transfer is insignificant. The total Nusselt number increases with the volume fraction of nanoparticles, the radiation parameter and the aspect ratio of the heated elements. The numerical results also revealed that the Cu and Ag-water nanofluid offer a better heat exchange.

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“…The study showed that the local and the average Nusselt numbers increased in all cases. Mansour et al 10 were interested in finding out to what extent the heat source and sink affect entropy generation and MHD natural convection of the square cavity containing the

{Al}_{2} O_{3}

‐Cu (water) hybrid nanofluid. The temperature of the nanofluid was rising or falling due to the heat source or the heat sink, respectively.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Caputo fractional derivatives on convective flow in wavy vented enclosures filled with a porous medium using Al₂O₃‐Cu hybrid nanofluids

et al. 2020

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This paper studies the effect of fractional derivatives on the fractional convective flow of hybrid nanofluids in a wavy enclosure that has inlet and outlet parts near the left wall and is filled with a porous medium. The Caputo definition of the fractional derivatives is applied on the partial differential equations governing flow. The complex shape is mapped to a rectangular domain using appropriate transformations. The finite difference method is used to solve the resulting system. The results showed that an increase in order of the fractional derivatives causes a low activity of the fluid flow and a reduction in the rate of heat transfer. Also, an increase in the nanoparticles volume fractions reduces the activity of the fluid flow and, as a result, the rate of heat transfer is diminished. An enhancement in fluid motion and rate of the heat transfer is obtained by increasing the amplitude of the wavy wall.

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Effects of heat source and sink on entropy generation and MHD natural convection of Al 2 O 3 -Cu/water hybrid nanofluid filled with square porous cavity

Cited by 164 publications

References 17 publications

A numerical approach for MHD Al₂O₃–TiO₂/H₂O hybrid nanofluids over a stretching cylinder under the impact of shape factor

A numerical approach for MHD Al₂O₃–TiO₂/H₂O hybrid nanofluids over a stretching cylinder under the impact of shape factor

Natural Convection and Thermal Radiation Influence on Nanofluids in a Cubical Cavity

Effects of the Caputo fractional derivatives on convective flow in wavy vented enclosures filled with a porous medium using Al₂O₃‐Cu hybrid nanofluids

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Effects of heat source and sink on entropy generation and MHD natural convection of Al 2 O 3 -Cu/water hybrid nanofluid filled with square porous cavity

Cited by 164 publications

References 17 publications

A numerical approach for MHD Al2O3–TiO2/H2O hybrid nanofluids over a stretching cylinder under the impact of shape factor

A numerical approach for MHD Al2O3–TiO2/H2O hybrid nanofluids over a stretching cylinder under the impact of shape factor

Natural Convection and Thermal Radiation Influence on Nanofluids in a Cubical Cavity

Effects of the Caputo fractional derivatives on convective flow in wavy vented enclosures filled with a porous medium using Al2O3‐Cu hybrid nanofluids

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A numerical approach for MHD Al₂O₃–TiO₂/H₂O hybrid nanofluids over a stretching cylinder under the impact of shape factor

A numerical approach for MHD Al₂O₃–TiO₂/H₂O hybrid nanofluids over a stretching cylinder under the impact of shape factor

Effects of the Caputo fractional derivatives on convective flow in wavy vented enclosures filled with a porous medium using Al₂O₃‐Cu hybrid nanofluids