Chemical reaction and variable viscosity effects on MHD mixed convection heat and mass transfer for Hiemenz flow over a porous wedge in the presence of suction or injection

R. Kandasamy, Ishak Hashim, Muhaimin

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Abstract

The effects of chemical reaction and variable viscosity on MHD mixed convection heat and mass transfer for Hiemenz flow over a porous wedge plate has been studied in the presence of suction or injection. The wall of the wedge is embedded in a uniform Darcian porous medium in order to allow for possible fluid wall suction or injection and has a power-law variation of both the wall temperature and concentration. 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 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, chemical reaction, the buoyancy ratio between species and thermal diffusion and suction / injection at wall surface. Effects of these major parameters on the 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. Comparisons with previously published works are performed and excellent agreement between the results is obtained.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalInternational Journal of Fluid Mechanics Research
Volume35
Issue number1
DOIs
Publication statusPublished - 2008

Fingerprint

Mixed convection
suction
Magnetohydrodynamics
wedges
mass transfer
Chemical reactions
chemical reactions
convection
Mass transfer
heat transfer
Viscosity
viscosity
injection
Porous plates
Heat transfer
Laminar boundary layer
Thermal diffusion
Fluids
Boundary layer flow
Buoyancy

Keywords

  • Buoyancy ratio
  • Chemical reaction
  • Hiemenz flow and porous medium
  • MHD mixed convection

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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abstract = "The effects of chemical reaction and variable viscosity on MHD mixed convection heat and mass transfer for Hiemenz flow over a porous wedge plate has been studied in the presence of suction or injection. The wall of the wedge is embedded in a uniform Darcian porous medium in order to allow for possible fluid wall suction or injection and has a power-law variation of both the wall temperature and concentration. 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 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, chemical reaction, the buoyancy ratio between species and thermal diffusion and suction / injection at wall surface. Effects of these major parameters on the 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. Comparisons with previously published works are performed and excellent agreement between the results is obtained.",
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N2 - The effects of chemical reaction and variable viscosity on MHD mixed convection heat and mass transfer for Hiemenz flow over a porous wedge plate has been studied in the presence of suction or injection. The wall of the wedge is embedded in a uniform Darcian porous medium in order to allow for possible fluid wall suction or injection and has a power-law variation of both the wall temperature and concentration. 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 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, chemical reaction, the buoyancy ratio between species and thermal diffusion and suction / injection at wall surface. Effects of these major parameters on the 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. Comparisons with previously published works are performed and excellent agreement between the results is obtained.

AB - The effects of chemical reaction and variable viscosity on MHD mixed convection heat and mass transfer for Hiemenz flow over a porous wedge plate has been studied in the presence of suction or injection. The wall of the wedge is embedded in a uniform Darcian porous medium in order to allow for possible fluid wall suction or injection and has a power-law variation of both the wall temperature and concentration. 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 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, chemical reaction, the buoyancy ratio between species and thermal diffusion and suction / injection at wall surface. Effects of these major parameters on the 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. Comparisons with previously published works are performed and excellent agreement between the results is obtained.

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