Numerical investigation into entropy generation in a transient generalized Couette flow of nanofluids with convective cooling

Mkwizu, Michael Hamza; Makinde, Oluwole Daniel; Nkansah-Gyekye, Yaw

doi:10.1007/s12046-015-0432-0

Cited by 10 publications

(6 citation statements)

References 23 publications

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“…where, w T is the ambient temperature which also corresponds to the lower wall temperature. The following dimensionless variables and parameters are to be introduced into equation ( 1) to equation (6).…”

Section: Mathematical Modelmentioning

confidence: 99%

Effect of Magnetic Field on the wall Permeable Channel Flow with Convective Cooling

Mfinanga

Iddi

2020

IJASRE

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This study aimed at making an investigation on the effect of the magnetic field on second law analysis for magnetohydrodynamic (MHD) permeable channel flow with convective cooling. Specifically, the study intended to develop a flow model for a case of nanofluid in a channel, determining the effect of different parameters on velocity and temperature of nanofluid and to determine the effect of the magnetic field on the channel flow of nanofluid.In this study, the appropriate mathematical model for the problem was derived from the laws of conservation, momentum and energy balance where both first and second laws of thermodynamics are utilized to analyze the model problem. Using the discretization finite difference method together with the Runge-Kutta Fehlberg integration scheme, the governing partial differential equations are solved numerically and implemented on the Computer using Matlab software. The findings showed that the alumina water nanofluid tended to flow quicker than copper water nanofluid and the velocity profile increased with Hartmann number but decreased with the quantity of nanoparticle volume fraction and magnetic field.

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Section: Mathematical Modelmentioning

confidence: 99%

Effect of Magnetic Field on the wall Permeable Channel Flow with Convective Cooling

Mfinanga

Iddi

2020

IJASRE

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“…Some important study of nanofluid with respect to their modern application can be seen in the literature. [44][45][46][47][48][49][50][51] The focal intention of this inspection is to examine the three-dimensional squeezing flow of CNTs nanofluids considering MHD and thermal radiation impacts through entropy generation. The influences of emerging parameters are deliberated through graphs.…”

Section: Introductionmentioning

confidence: 99%

Unsteady squeezing flow of magnetohydrodynamic carbon nanotube nanofluid in rotating channels with entropy generation and viscous dissipation

Dawar

Shah

Khan

et al. 2019

Advances in Mechanical Engineering

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The most favorable gift of modern science is nanofluid. The nanofluid can able to move freely through micro channels with the spreading of nanoparticles. Due to improved convection between the base liquid surfaces and nanoparticles, the nano suspensions express high thermal conductivity. Also, the benefits of suspending nanoparticles in base fluids are increased heat capacity, surface area, effective thermal conductivity, collision, and interaction among particles. This research aim to study squeezing flow of carbon nanotubes based on water (H 2 O) in rotating channels. Entropy generation is evaluated and for this purpose, second law of thermodynamics is employed. The influences of thermal radiation, viscous dissipation, and applied magnetic field on nanofluid are taken into account. The flow of the nanofluid is considered in unsteady three dimensions. The transformed ordinary differential equations (ODEs) are solved by homotopy analysis method with the help of similarity variables. Results obtained for single and multi-wall carbon nanotubes are compared. Plots have been presented in order to examine how the velocities, temperature, and entropy profiles become affected by numerous physical parameters. Generally, the velocity profiles escalate when the upper plate of the channel moves toward the lower stretching one and reduces when the upper plate is moving away from the lower one. The velocity profile in y-direction escalates with the escalation in nanoparticle volume fraction and suction parameter while the rotation parameter bids dual behavior with the escalating values. The velocity profile in x-direction bids the oscillatory behavior with the enhancement in nanoparticle volume fraction, rotation parameter, and magnetic parameter. The physical properties of carbon nanotubes, thermo physical properties of carbon nanotubes and nanofluid of some base fluids, and thermal conductivity of carbon nanotubes with different volume fractions are shown through tables.

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“…Seth et al [ 30 ] calculated the Hall effect on Couette flow with entropy generation. Mkwizu et al [ 31 ] numerically studied the Couette flow. Adesanya and Makinde [ 32 ] investigated the flow of couple stress nanofluid with entropy generation.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation Optimization in Squeezing Magnetohydrodynamics Flow of Casson Nanofluid with Viscous Dissipation and Joule Heating Effect

Zubair

Shah

Dawar

et al. 2019

Entropy

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In this research article, the investigation of the three-dimensional Casson nanofluid flow in two rotating parallel plates has been presented. The nanofluid has been considered in steady state. The rotating plates have been considered porous. The heat equation is considered to study the magnetic field, joule heating, and viscous dissipation impacts. The nonlinear ordinary system of equations has been solved analytically and numerically. For skin friction and Nusslt number, numerical results are tabulated. It is found that velocity declines for higher values of magnetic and porosity parameter while it is heightened through squeezing parameter. Temperature is an enhancing function for Eckert number and nanoparticles volume fraction. Entropy generation is augmented with radiation parameter, Prandtl, and Eckert numbers. The Casson, porosity, magnetic field, and rotation parameters were reduced while the squeezing and suction parameters increased the velocity profile along x-direction. The porosity parameter increased the Bejan number while the Eckert and Prandtl numbers decreased the Bejan number. Skin friction was enhanced with increasing the Casson, porosity, and magnetic parameters while it decreased with enhancing rotation and squeezing parameters. All these impacts have been shown via graphs. The influences by fluid flow parameters over skin friction and Nusselt number are accessible through tables.

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Numerical investigation into entropy generation in a transient generalized Couette flow of nanofluids with convective cooling

Cited by 10 publications

References 23 publications

Effect of Magnetic Field on the wall Permeable Channel Flow with Convective Cooling

Effect of Magnetic Field on the wall Permeable Channel Flow with Convective Cooling

Unsteady squeezing flow of magnetohydrodynamic carbon nanotube nanofluid in rotating channels with entropy generation and viscous dissipation

Entropy Generation Optimization in Squeezing Magnetohydrodynamics Flow of Casson Nanofluid with Viscous Dissipation and Joule Heating Effect

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