THERMAL SCIENCE

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Branko Z. Boričić

,

Aleksandar Z. Boričić

UNSTEADY MAGNETOHYDRODYNAMIC MIXED CONVECTION FLOW WITH HEAT AND MASS TRANSFER OVER A HORIZONTAL CIRCULAR CYLINDER EMBEDDED IN A POROUS MEDIUM

ABSTRACT
The objective of the present study is to investigate the effect of flow parameters on the mixed convection heat and mass transfer of an unsteady magnetohydrodynamic flow of an electrically conducting, viscous, and incompressible fluid over a horizontal circular cylinder embedded in porous medium, considering effects of chemical reaction and heat source/sink, by taking into account viscous dissipation. The present magnetic field is homogenous and perpendicular to the body surface. Magnetic Reynolds number is significantly lower than one i. e. considered the problem is in approximation without induction. The governing non-linear partial differential equations and associated boundary conditions are made dimensionless using a suitable similarity transformation and similarity parameters. System of non-dimensionless equations are solved numerically by implicit finite difference three-diagonal and iteration method. Numerical results obtained for different values of porous medium, magnetic, diffusion and temperature parameters, buoyancy diffusion parameter and thermal parameter and for different values Prandtl, Echart, and Schmidt numbers. Variation of velocity, temperature and concentration and many integral and differential characteristics boundary layer are discussed and shown graphically.
KEYWORDS
magnetohydrodynamic boundary layer, mixed convection, porous medium, chemical reaction, heat source or sink
PAPER SUBMITTED: 2016-04-05
PAPER REVISED: 2016-09-12
PAPER ACCEPTED: 2016-09-15
PUBLISHED ONLINE: 2016-12-25
DOI REFERENCE: https://doi.org/10.2298/TSCI16S5381B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Supplement 5, PAGES [S1381 - S1390]
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UNSTEADY MAGNETOHYDRODYNAMIC MIXED CONVECTION FLOW WITH HEAT AND MASS TRANSFER OVER A HORIZONTAL CIRCULAR CYLINDER EMBEDDED IN A POROUS MEDIUM

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