Entropy generation analysis of MHD nanofluid flow in a porous vertical microchannel with nonlinear thermal radiation, slip flow and convective-radiative boundary conditions

López, Aracely; Ibáñez, Guillermo; Pantoja, Joel; Moreira, J.; Danguillecourt, Orlando Lastres

doi:10.1016/j.ijheatmasstransfer.2016.10.126

Cited by 160 publications

(79 citation statements)

References 37 publications

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“…For example, Afridi and Qasim [34] proposed a model comprising of nanofluid with the addition of thermal radiation and viscous dissipation by a moving needle discussing the entropy generation. Lopez et al [35] reported a radiative flow past a vertical porous micro-channel. The velocity slip and entropy generation were given due emphasis.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation and Consequences of Binary Chemical Reaction on MHD Darcy–Forchheimer Williamson Nanofluid Flow Over Non-Linearly Stretching Surface

Rasool

Zhang

Chamkha

et al. 2019

Entropy

203

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The current article aims to present a numerical analysis of MHD Williamson nanofluid flow maintained to flow through porous medium bounded by a non-linearly stretching flat surface. The second law of thermodynamics was applied to analyze the fluid flow, heat and mass transport as well as the aspects of entropy generation using Buongiorno model. Thermophoresis and Brownian diffusion is considered which appears due to the concentration and random motion of nanoparticles in base fluid, respectively. Uniform magnetic effect is induced but the assumption of tiny magnetic Reynolds number results in zero magnetic induction. The governing equations (PDEs) are transformed into ordinary differential equations (ODEs) using appropriately adjusted transformations. The numerical method is used for solving the so-formulated highly nonlinear problem. The graphical presentation of results highlights that the heat flux receives enhancement for augmented Brownian diffusion. The Bejan number is found to be increasing with a larger Weissenberg number. The tabulated results for skin-friction, Nusselt number and Sherwood number are given. A decent agreement is noted in the results when compared with previously published literature on Williamson nanofluids.

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Section: Introductionmentioning

confidence: 99%

Entropy Generation and Consequences of Binary Chemical Reaction on MHD Darcy–Forchheimer Williamson Nanofluid Flow Over Non-Linearly Stretching Surface

Rasool

Zhang

Chamkha

et al. 2019

Entropy

203

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show abstract

“…Aljoufi and Ebaid [32] presented an exact solution of the significant impact of convective boundary condition on the boundary layer slip flow over a stretching surface. Lopez et al [33] examined the significant role of thermal radiation with convective boundary condition on MHD nanofluid in a microchannel. Hassan and Salawu [34] analysed the convective surface boundary effect on buoyancy-driven flow in a parallel channel.…”

Section: Introductionmentioning

confidence: 99%

Thermal radiation effect on boundary layer over a flat plate having convective surface boundary condition

Jha

Samaila

2020

SN Appl. Sci.

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This paper presents the effect of thermal radiation on the boundary layer over a flat plate. The convective boundary condition is applied at the surface of the flat plate. The solution to the coupled non-linear transport equations is obtained using the Runge-Kutta-Fehlberg fourth-fifth order (RKF45) method. The impact of thermal radiation on mercury, air, sulphur oxide and water whose Prandtl numbers ( Pr ) are 0.044, 0.72, 2, and 7 respectively are depicted using line graphs and tables. The impact of Prandtl number ( Pr ), local convective heat transfer (a) and temperature difference ( C T ) on temperature distribution are also presented. The results indicated that the boundary layer thickness decreases with Pr augment but increases with increasing values R . Furthermore, R augment is inversely proportional to the temperature gradient near the plate while an opposite trend is observed away from the plate. The results also indicated that R augment reduces heat transfer but an opposite trend is observed with Pr augment. Pr augment has a decreasing effect on boundary layer thickness and a augment has an increasing effect on temperature.

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“…Kefayati had analyzed the second law analysis of an unsteady MHD natural convective power law fluid in an open cavity with Soret and Dufour effects and found out a solution by finite difference lattice Boltzmann method (FDLBM). Lopez et al had discussed entropy generation analysis of steady MHD nanofluid flow in a vertical microchannel bounded by two parallel plates with convective boundary conditions, slip flow, and thermal radiation. Aïboud and Saouli had presented the second law analysis of steady laminar MHD second‐grade fluid flow, heat, and mass transfer over a stretching sheet and obtained an analytical solution by Kummer's function.…”

Section: Introductionmentioning

confidence: 99%

Second law analysis in radiative mixed convective squeezing flow of Casson fluid between parallel disks with Soret and Dufour effects

Ramesh

Ojjela

Kumar

2019

Heat Trans. Asian Res.

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The present communication deals the entropy generation by cause of heat and mass transform in an unsteady mixed convective radiative squeezing flow of a Casson fluid confined between two parallel disks in the presence of diffusion‐thermo and thermal‐diffusion effects and temperature jump. The lower disk is taken to be porous and the upper one is impermeable. The governing PDE is converted as nonlinear ordinary differential equations (ODE) by using well‐established similarity transformations; then, the reduced nonlinear ODE are solved by shooting method with Runge‐Kutta fourth‐order approach. The influence of distinct nondimensional fluid and geometric‐related parameters on the velocity profiles, temperature, concentration, entropy generation number, and Bejan number are studied in detail and represented in the form of graphs. The entropy of the Casson fluid is increased with the Eckert number, whereas the concentration profile is decreased by squeezing Reynolds number. The current results are correlated with existing results for the viscous case and found to be in better agreement.

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Entropy generation analysis of MHD nanofluid flow in a porous vertical microchannel with nonlinear thermal radiation, slip flow and convective-radiative boundary conditions

Cited by 160 publications

References 37 publications

Entropy Generation and Consequences of Binary Chemical Reaction on MHD Darcy–Forchheimer Williamson Nanofluid Flow Over Non-Linearly Stretching Surface

Entropy Generation and Consequences of Binary Chemical Reaction on MHD Darcy–Forchheimer Williamson Nanofluid Flow Over Non-Linearly Stretching Surface

Thermal radiation effect on boundary layer over a flat plate having convective surface boundary condition

Second law analysis in radiative mixed convective squeezing flow of Casson fluid between parallel disks with Soret and Dufour effects

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