Numerical simulation of double diffusive natural convection in rectangular enclosure in the presences of magnetic field and heat source

Teamah, Mohamed A.

doi:10.1016/j.ijthermalsci.2007.02.003

Cited by 107 publications

(44 citation statements)

References 27 publications

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“…By using dimensionless variables given in Equation (14), the dimensionless local entropy generation in presence of an oriented magnetic force is then given by:…”

Section: Second Law Formulationmentioning

confidence: 99%

“…Further, axi-symmetric stable convection or even near the conduction state was obtained when the coil is located near the top plate of the cylinder, whereas strong and oscillatory convection was resulted when the magnetic coil is located near the bottom plate of the cylinder. Teamah [14] numerically studied steady heat and mass transfer by natural convection flow of a heat generating fluid in presence of a transverse magnetic field in a rectangular enclosure at fixed values of aspect ratio (A = 2), Lewis number (Le = 1) and Prandtl number (Pr = 0.7). It was found that magnetic field tends to reduce heat transfer and fluid circulation within the enclosure.…”

Section: Introductionmentioning

confidence: 99%

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

Jery

Hidouri

Magherbi³

et al. 2010

Entropy

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Abstract:The influence of an external oriented magnetic field on entropy generation in natural convection for air and liquid gallium is numerically studied in steady-unsteady states by solving the mass, the momentum and the energy conservation equations. Entropy generation depends on five parameters which are: the Prandtl number, the irreversibility coefficients, the inclination angle of the magnetic field, the thermal Grashof and the Hartmann numbers. Effects of these parameters on total and local irreversibilities as well as on heat transfer and fluid flow are studied. It was found that the magnetic field tends to decrease the convection currents, the heat transfer and entropy generation inside the enclosure. Influence of inclination angle of the magnetic field on local irreversibility is then studied.

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“…By using dimensionless variables given in Equation (14), the dimensionless local entropy generation in presence of an oriented magnetic force is then given by:…”

Section: Second Law Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Jery

Hidouri

Magherbi³

et al. 2010

Entropy

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“…They showed that both Ra number and buoyancy ratio play dominant role on entropy generation and heat and mass transfer. Teamah (2008) worked computationally on doublediffusive convective laminar flow in a rectangular closed space with the…”

Section: Introductionmentioning

confidence: 99%

Effects of Buoyancy Parameter on Unsteady 3d Double Diffusive Convection in Molten Pb-Sn Alloys

Öztop¹,

Chemseddine²,

Kolsi³

et al. 2017

Frontiers in Heat and Mass Transfer

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A computational study has been made for a three dimensional double diffusive convection with molten Pb-Sn by using finite volume method. In this work, two vertical walls have different temperature and different concentration while remaining walls are adiabatic. Buoyancy ratio, which changes between N = -0.1 and -10, is the main governing parameter during work. Other parameters are taken as fixed with Pr = 0.02, Le = 7500 and Ra = 5×10 3 . It is found that changing of buoyancy parameter becomes more effective on heat transfer than that of mass transfer.

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“…Then other experimental results (e.g., Choi et al, 2001;Das et al, 2007) have also illustrated that thermal conductivity of these nanofluids can be increased considerably via the introduction of nanoparticles. Because of its fundamental importance in engineering systems, entropy generation encountered in flows inside a channel has been studied by many researchers (e.g., Chamkha, 1995;Teamah, 2008).…”

Section: Introductionmentioning

confidence: 99%

MHD Nanofluid Flow With Viscous Dissipation and Joule Heating Through a Permeable Channel

Sayehvand¹,

Abelman²,

Parsa³

2017

Frontiers in Heat and Mass Transfer

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Magnetohydrodynamic (MHD) nanofluid flow considered to be steady, incompressible and electrically conducting, flows through permeable plates in the presence of convective heating, models as a system of nonlinear partial differential equations which are solved analytically by the Differential Transform Method (DTM). Copper, aluminum oxide and titanium dioxide nanoparticles are considered with Carboxyl Methyl Cellulose (CMC)-water as the base fluid. Variation of the effects of pertinent parameters on fluid velocity and temperature is analyzed parametrically. Verification between analytical (DTM) and numerical (fourth-order Runge-Kutta scheme) results and previous published research is shown to be quite agreeable. The temperature of Cu-water is found to be low in comparison with 2 3Al O -water and 2TiO -water which is reasonable for high thermal conductivity of copper. Furthermore increasing the volume fraction of nanoparticles causes enhancement of thermal conductivity and decrease in temperature.

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Numerical simulation of double diffusive natural convection in rectangular enclosure in the presences of magnetic field and heat source

Cited by 107 publications

References 27 publications

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

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

Effects of Buoyancy Parameter on Unsteady 3d Double Diffusive Convection in Molten Pb-Sn Alloys

MHD Nanofluid Flow With Viscous Dissipation and Joule Heating Through a Permeable Channel

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