Effect of an External Oriented Magnetic Field on Entropy Generation in Natural Convection

Jery, Atef El; Hidouri, Nejib; Magherbi, Mourad; Brahim, Ammar Ben

doi:10.3390/e12061391

Cited by 57 publications

(32 citation statements)

References 47 publications

(57 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As such, in [47] discusses the influence of inclined magnetic field on peristaltic flow of a Williamson fluid model in an inclined channel without nanofluid. In [40] encounters the effects of and external oriented magnetic field on entropy in a cavity configuration without nanoparticles. Reference [48] studies the MHD effects on heat transfer and entropy generation of nanofluid flow in an open cavity in the presence of an inclined magnetic field.…”

Section: Mathematical Modellingmentioning

confidence: 99%

“…Eegunjobi and Makinde [39] analysed the combined effect of buoyancy force and Navier slip on entropy generation in a vertical porous channel. Jery et al presented the effect of an external oriented magnetic field on entropy generation in natural convection [40]. The incompressible viscous laminar flow through a channel filled with porous media is studied by Dwivedi et all [41].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Oriented Magnetic Field Effects on Entropy Generation in an Inclined Channel Filled with Ferrofluids

Başkaya

Kömürgöz

Özkol

2017

Entropy

View full text Add to dashboard Cite

Dispersion of super-paramagnetic nanoparticles in nonmagnetic carrier fluids, known as ferrofluids, offers the advantages of tunable thermo-physical properties and eliminate the need for moving parts to induce flow. This study investigates ferrofluid flow characteristics in an inclined channel under inclined magnetic field and constant pressure gradient. The ferrofluid considered in this work is comprised of Cu particles as the nanoparticles and water as the base fluid. The governing differential equations including viscous dissipation are non-dimensionalised and discretized with Generalized Differential Quadrature Method. The resulting algebraic set of equations are solved via Newton-Raphson Method. The work done here contributes to the literature by searching the effects of magnetic field angle and channel inclination separately on the entropy generation of the ferrofluid filled inclined channel system in order to achieve best design parameter values so called entropy generation minimization is implemented. Furthermore, the effect of magnetic field, inclination angle of the channel and volume fraction of nanoparticles on velocity and temperature profiles are examined and represented by figures to give a thorough understanding of the system behavior.

show abstract

Section: Mathematical Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Oriented Magnetic Field Effects on Entropy Generation in an Inclined Channel Filled with Ferrofluids

Başkaya

Kömürgöz

Özkol

2017

Entropy

View full text Add to dashboard Cite

show abstract

“…They affirmed that velocity profiles are parabolic in nature. Other several authors [5][6][7][8][9][10][11][12][13] have investigated different problems to analyze effects of entropy on thermal systems and to proffer ways to minimize them.…”

Section: Introductionmentioning

confidence: 99%

Entropy generation and irreversibility analysis due to steady mixed convection flow in a vertical porous channel

Ajibade¹,

Onoja²

2017

IJHT

View full text Add to dashboard Cite

Entropy generation and irreversibility distribution due to steady mixed convection flow of a viscous incompressible fluid between two vertical parallel porous plates is investigated in the present study. The mathematical model capturing this physical situation was formulated considering internal heat generation and viscous dissipation within the channel. Combining the viscous dissipation effect with mixed convection lead to nonlinearity of the energy equation as well as coupling of the energy with the momentum equations. Due to the coupling and nonlinearity associated with the energy and momentum equations, obtaining a closed form solution becomes practically infeasible; therefore approximate solutions to the governing equations are obtained using the Homotopy Perturbation Method (HPM). The impacts of the several governing parameters on the velocity, temperature, the entropy generation number including the irreversibility distribution ratio were investigated and discussed. From the course of investigation, it was revealed that entropy generation number decreases near the centre line of the channel and higher near the porous plates. It is also discovered that fluid friction irreversibility dominates entropy generation towards the channels porous walls while heat transfer irreversibility dominates towards the centerline of the channel.

show abstract

“…There have been many theoretical models developed specifically for entropy generation analysis of MHD boundary layer flow [31][32][33][34][35][36][37]. However, to the best of our knowledge, no investigation has been made yet to not only analyze the entropy generation of the slip MHD flow and heat transfer over permeable continuous moving surface but also to reach a new design of MHD flow over embedded surface microchannels.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation Analysis of Open Parallel Microchannels Embedded Within a Permeable Continuous Moving Surface: Application to Magnetohydrodynamics (MHD)

Yazdi

Abdullah

Hashim

et al. 2011

Entropy

View full text Add to dashboard Cite

This paper presents a new design of open parallel microchannels embedded within a permeable continuous moving surface due to reduction of exergy losses in magnetohydrodynamic (MHD) flow at a prescribed surface temperature (PST). The entropy generation number is formulated by an integral of the local rate of entropy generation along the width of the surface based on an equal number of microchannels and no-slip gaps interspersed between those microchannels. The velocity, the temperature, the velocity gradient and the temperature gradient adjacent to the wall are substituted into this equation resulting from the momentum and energy equations obtained numerically by an explicit Runge-Kutta (4, 5) formula, the Dormand-Prince pair and shooting method. The entropy generation number, as well as the Bejan number, for various values of the involved parameters of the problem are also presented and discussed in detail.

show abstract

Effect of an External Oriented Magnetic Field on Entropy Generation in Natural Convection

Cited by 57 publications

References 47 publications

Investigation of Oriented Magnetic Field Effects on Entropy Generation in an Inclined Channel Filled with Ferrofluids

Investigation of Oriented Magnetic Field Effects on Entropy Generation in an Inclined Channel Filled with Ferrofluids

Entropy generation and irreversibility analysis due to steady mixed convection flow in a vertical porous channel

Entropy Generation Analysis of Open Parallel Microchannels Embedded Within a Permeable Continuous Moving Surface: Application to Magnetohydrodynamics (MHD)

Contact Info

Product

Resources

About