Combined heat and mass transfer in MHD free convection from a wedge with Ohmic heating and viscous dissipation in the presence of suction or injection

R. Kandasamy, Ishak Hashim, A. B. Khamis, I. Muhaimin

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4 Citations (Scopus)

Abstract

The problem of combined heat and mass transfer of an electrically conducting fluid in MHD natural convection adjacent to a vertical surface is analyzed, taking into account the effects of Ohmic heating in the presence of suction or injection. An approximate numerical solution for the steady laminar boundary-layer flow over a wall of the wedge in the presence of species concentration and mass diffusion has been obtained by solving the governing equations using the numerical technique. The fluid is assumed to be viscous and incompressible. Numerical calculations are carried out for different values of dimensionless parameters and an analysis of the results obtained shows that the flow field is influenced appreciably by the magnetic effect, the buoyancy ratio between species and thermal diffusion and suction/injection at the wall surface. Effects of these major parameters on transport behaviors are investigated methodically and typical results are illustrated to reveal the tendency of the solutions. Representative results are presented for the velocity, temperature, and concentration distributions, as well as the local skin-friction coefficient and skin friction.

Original languageEnglish
Pages (from-to)151-162
Number of pages12
JournalIranian Journal of Science and Technology, Transaction A: Science
Volume31
Issue number2
Publication statusPublished - Mar 2007

Fingerprint

ohmic heating
Viscous Dissipation
Convection
Free Convection
Joule heating
skin friction
Friction
Skin friction
Heat and Mass Transfer
suction
Suction
Magnetohydrodynamics
Wedge
mass transfer
friction
Natural convection
heat transfer
free convection
Heating
wedges

Keywords

  • Boussinesq fluid
  • Buoyancy ratio
  • MHD boundary layer flow and suction/injection at the wall of the wedge
  • Ohmic heating

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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abstract = "The problem of combined heat and mass transfer of an electrically conducting fluid in MHD natural convection adjacent to a vertical surface is analyzed, taking into account the effects of Ohmic heating in the presence of suction or injection. An approximate numerical solution for the steady laminar boundary-layer flow over a wall of the wedge in the presence of species concentration and mass diffusion has been obtained by solving the governing equations using the numerical technique. The fluid is assumed to be viscous and incompressible. Numerical calculations are carried out for different values of dimensionless parameters and an analysis of the results obtained shows that the flow field is influenced appreciably by the magnetic effect, the buoyancy ratio between species and thermal diffusion and suction/injection at the wall surface. Effects of these major parameters on transport behaviors are investigated methodically and typical results are illustrated to reveal the tendency of the solutions. Representative results are presented for the velocity, temperature, and concentration distributions, as well as the local skin-friction coefficient and skin friction.",
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T1 - Combined heat and mass transfer in MHD free convection from a wedge with Ohmic heating and viscous dissipation in the presence of suction or injection

AU - Kandasamy, R.

AU - Hashim, Ishak

AU - Khamis, A. B.

AU - Muhaimin, I.

PY - 2007/3

Y1 - 2007/3

N2 - The problem of combined heat and mass transfer of an electrically conducting fluid in MHD natural convection adjacent to a vertical surface is analyzed, taking into account the effects of Ohmic heating in the presence of suction or injection. An approximate numerical solution for the steady laminar boundary-layer flow over a wall of the wedge in the presence of species concentration and mass diffusion has been obtained by solving the governing equations using the numerical technique. The fluid is assumed to be viscous and incompressible. Numerical calculations are carried out for different values of dimensionless parameters and an analysis of the results obtained shows that the flow field is influenced appreciably by the magnetic effect, the buoyancy ratio between species and thermal diffusion and suction/injection at the wall surface. Effects of these major parameters on transport behaviors are investigated methodically and typical results are illustrated to reveal the tendency of the solutions. Representative results are presented for the velocity, temperature, and concentration distributions, as well as the local skin-friction coefficient and skin friction.

AB - The problem of combined heat and mass transfer of an electrically conducting fluid in MHD natural convection adjacent to a vertical surface is analyzed, taking into account the effects of Ohmic heating in the presence of suction or injection. An approximate numerical solution for the steady laminar boundary-layer flow over a wall of the wedge in the presence of species concentration and mass diffusion has been obtained by solving the governing equations using the numerical technique. The fluid is assumed to be viscous and incompressible. Numerical calculations are carried out for different values of dimensionless parameters and an analysis of the results obtained shows that the flow field is influenced appreciably by the magnetic effect, the buoyancy ratio between species and thermal diffusion and suction/injection at the wall surface. Effects of these major parameters on transport behaviors are investigated methodically and typical results are illustrated to reveal the tendency of the solutions. Representative results are presented for the velocity, temperature, and concentration distributions, as well as the local skin-friction coefficient and skin friction.

KW - Boussinesq fluid

KW - Buoyancy ratio

KW - MHD boundary layer flow and suction/injection at the wall of the wedge

KW - Ohmic heating

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