Magnetoconvection in an enclosure with partially active vertical walls

Kandaswamy, P.; Sundari, S. Malliga; Nithyadevi, N.

doi:10.1016/j.ijheatmasstransfer.2007.06.025

Cited by 67 publications

(29 citation statements)

References 15 publications

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“…The dimensionless parameters in the above equations are as following: (5) Where Ra, Pr and Ha are the Rayleigh, Prandtl and Hartmann numbers and are defined as (6) Where, ν is the kinematic viscosity. The details of the derivation the equations have been presented by Mahmoodi and Talea'pour [8].…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Wang et al [5] reported results of a numerical study on magnetohydrodynamic natural convection in a porous media filled square cavity. Kandaswamy et al [6] studied numerically magnetohydrodynamic natural convection in a square cavity with partially thermally active side walls. They considered nine dierent combinations of the relative positions of the active portions.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a Magnetic Field on Mixed Convection of a Nanofluid in a Square Cavity

Sheikhzadeh¹,

Sebdani²,

Mahmoodi³

et al. 2013

Journal of Magnetics

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The problem of mixed convection in a differentially heated lid-driven square cavity filled with Cu-water nanofluid under effect of a magnetic field is investigated numerically. The left and right walls of the cavity are kept at temperatures of T h and T c respectively while the horizontal walls are adiabatic. The top wall of the cavity moves in own plane from left to right. The effects of some pertinent parameters such as Richardson number (ranging from 0.1 to 10), the volume fraction of the nanoparticles (ranging 0 to 0.1) and the Hartmann number (ranging from 0 to 60) on the fluid flow and temperature fields and the rate of heat transfer in the cavity are investigated. It must be noted that in all calculations the Prandtl number of water as the pure fluid is kept at 6.8, while the Grashof number is considered fixed at 10 4 . The obtained results show that the rate of heat transfer increases with an increase of the Reynolds number, while but it decreases with increase in the Hartmann number. Moreover it is found that based the Richardson and Hartmann numbers by increase in volume fraction of the nanoparticles the rate of heat transfer can be enhanced or deteriorated compared to the based fluid.

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Section: Mathematical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of a Magnetic Field on Mixed Convection of a Nanofluid in a Square Cavity

Sheikhzadeh¹,

Sebdani²,

Mahmoodi³

et al. 2013

Journal of Magnetics

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“…Mehmet and Elif [6] studied the natural convection flow under a magnetic field in an inclined rectangular enclosure heated and cooled on adjacent walls. Kandaswamy et al [5] studied magnetohydrodynamic natural convection in an enclosure with partially active vertical walls. Nithyadevi et al [7] investigated the natural convection flow under a magnetic field in a square cavity with partially active vertical walls having time periodic boundary condition.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection Flow Of An Electrically Conducting Fluid In A Rectangular Cavity Having Internal Energy Sources With Linearly Heated Bottom Wall

Obayedullah

Chowdhury

2013

GANIT: J. Bangladesh Math. Soc.

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Natural convection flow in a rectangular cavity containing internally heated and electrically conducting fluid has been investigated numerically. The bottom wall of the cavity is linearly heated whereas the top wall is well insulated. The left and right vertical walls are maintained at constant hot and cold temperature respectively. Results have been obtained with respect to Rayleigh numbers and Hartmann numbers. Flow and temperature fields for these cases have been studied. Average Nusselt numbers at hot, cold and linearly heated bottom wall have been calculated. It is found that the temperature, fluid flow and heat transfer strongly depend on internal and external Rayleigh numbers and Hartmann numbers.

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“…They found that heat transfer rate increases with increase in the aspect ratio and when the cooling location is at the top of the enclosure. Kandaswamy et al [7] studied the natural convection in a square cavity filled with an electrically conducting fluid with partially thermally active vertical walls, for nine different combinations of active locations in the presence of external magnetic field parallel to gravity. They found that the heat transfer rate is enhanced in the middle thermally active locations, while it is poor for the top-bottom case.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies on entropy generation analysis [27][28][29][30][31][32][33][34][35] reveal new methods for reducing computational cost and in which entropy generation due heat/mass transfer is analyzed. Chen et al [27] introduced a simple lattice Boltzmann model to investigate convectional phenomena at higher Rayleigh number up to 10 7 .They obtained that the flow is primarily dominated by thermal buoyancy effects, whereas for N > 1, the flow is mainly dominated by compositional buoyancy effects. The average Nusselt number Nu and the average Sherwood number Sh at the inner wall both are monotonic increasing functions of aspect ratio for N > 1.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Magnetic Field Effect on Entropy Generation at Thermosolutal Convection in a Square Cavity

Bouabid

Hidouri

Magherbi

et al. 2011

Entropy

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Thermosolutal convection in a square cavity filled with air and submitted to an inclined magnetic field is investigated numerically. The cavity is heated and cooled along the active walls with a mass gradient whereas the two other walls of the cavity are adiabatic and insulated. Entropy generation due to heat and mass transfer, fluid friction and magnetic effect has been determined in transient state for laminar flow by solving numerically the continuity, momentum energy and mass balance equations, using a Control Volume Finite-Element Method. The structure of the studied flows depends on four dimensionless parameters which are the Grashof number, the buoyancy ratio, the Hartman number and the inclination angle. The results show that the magnetic field parameter has a retarding effect on the flow in the cavity and this lead to a decrease of entropy generation, Temperature and concentration decrease with increasing value of the magnetic field parameter.

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Magnetoconvection in an enclosure with partially active vertical walls

Cited by 67 publications

References 15 publications

Effect of a Magnetic Field on Mixed Convection of a Nanofluid in a Square Cavity

Effect of a Magnetic Field on Mixed Convection of a Nanofluid in a Square Cavity

Natural Convection Flow Of An Electrically Conducting Fluid In A Rectangular Cavity Having Internal Energy Sources With Linearly Heated Bottom Wall

Analysis of the Magnetic Field Effect on Entropy Generation at Thermosolutal Convection in a Square Cavity

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