Numerical investigation of buoyancy effects on hydromagnetic unsteady flow through a porous channel with suction/injection

Makinde, Oluwole Daniel; Chinyoka, T.

doi:10.1007/s12206-013-0221-9

Cited by 34 publications

(24 citation statements)

References 18 publications

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“…model, we employ the Booussinesq approximation [24], where the gravitational pull on the temperature dependent fluid density acts as a pump for the flow. Using the Stoke's constitutive model for the couple stresses, the momentum balance equation, the energy balance equation, and the local volumetric entropy generation rate (E G ) are given as follows [25,26]:…”

Section: Mathematical Formulationmentioning

confidence: 99%

Entropy Generation Rate in Unsteady Buoyancy-Driven Hydromagnetic Couple Stress Fluid Flow Through a Porous Channel

Kareem¹,

Adesanya²,

Falade³

et al. 2017

Int. J. of Pure and Appl. Math.

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In this paper, the entropy generation rate in unsteady buoyancy-driven hydromagnetic couple stress fluid flow through a porous channel has been investigated. The partial differential equations are converted into their corresponding dimensionless equivalence, including the prescribed initial boundary conditions. These equations were solved using the Adomian decomposition method and the behaviour of some pertinent fluid variables, such as velocity, temperature, entropy generation rate and the irreversibility ratio were examined and discussed for different parameters of interest, which include, the Grashof number, the Hartmann's number, the Reynolds number, the Brinkman number and the couple stress pa- Graphs are shown to illustrate the findings.

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Section: Mathematical Formulationmentioning

confidence: 99%

Entropy Generation Rate in Unsteady Buoyancy-Driven Hydromagnetic Couple Stress Fluid Flow Through a Porous Channel

Kareem¹,

Adesanya²,

Falade³

et al. 2017

Int. J. of Pure and Appl. Math.

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“…The incompressible viscous laminar flow through a channel filled with porous media is studied by Dwivedi et all [41]. Numerical investigation of buoyancy effects on hydromagnetic unsteady flow through a porous channel with suction/injection is conducted by Makinde and Chinyoka [42].…”

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

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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.

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“…Entropy generation in an MHD porous channel flow of variable viscosity and convective heating has been described by Eegunjobi and Makinde [37]. Makinde and Chinyoka [38] have investigated the buoyancy effects on hydromagnetic unsteady flow through a porous channel with suction/ injection. Das and Jana [39] have studied the entropy generation in MHD porous channel flow under constant pressure gradient.…”

Section: Introductionmentioning

confidence: 99%

Entropy analysis on MHD pseudo-plastic nanofluid flow through a vertical porous channel with convective heating

Das

Banu

Jana

et al. 2015

Alexandria Engineering Journal

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This paper is concerned with the entropy generation in a magnetohydrodynamic (MHD) pseudo-plastic nanofluid flow through a porous channel with convective heating. Three different types of nanoparticles, namely copper, aluminum oxide and titanium dioxide are considered with pseudo-plastic carboxymethyl cellulose (CMC)-water used as base fluids. The governing equations are solved numerically by shooting technique coupled with Runge-Kutta scheme. The effects of the pertinent parameters on the fluid velocity, temperature, entropy generation, Bejan number as well as the shear stresses at the channel walls are presented graphically and analyzed in detail. It is possible to determine optimum values of magnetic parameter, power-law index, Eckert number and Boit number which lead to a minimum entropy generation rate. ª 2015 Production and hosting by Elsevier B.V. on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

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Numerical investigation of buoyancy effects on hydromagnetic unsteady flow through a porous channel with suction/injection

Cited by 34 publications

References 18 publications

Entropy Generation Rate in Unsteady Buoyancy-Driven Hydromagnetic Couple Stress Fluid Flow Through a Porous Channel

Entropy Generation Rate in Unsteady Buoyancy-Driven Hydromagnetic Couple Stress Fluid Flow Through a Porous Channel

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

Entropy analysis on MHD pseudo-plastic nanofluid flow through a vertical porous channel with convective heating

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