UNSTEADY MIXED CONVECTION WITH SORET AND DUFOUR EFFECTS PAST A POROUS PLATE MOVING THROUGH A BINARY MIXTURE OF CHEMICALLY REACTING FLUID

This study investigates the unsteady mixed convection flow past a vertical porous flat plate moving through a binary mixture in the presence of radiative heat transfer and nth-order Arrhenius type of irreversible chemical reaction by taking into account the diffusion-thermal (Dufour) and thermo-diff...

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Bibliographic Details
Published in:Chemical engineering communications 2011-01, Vol.198 (7), p.920-938
Main Authors: Makinde, O. D., Olanrewaju, P. O.
Format: Article
Language:English
Subjects:
Arrhenius kinetics
Binary mixture
Binary mixtures
Boundary layer
Boundary layer flow
Chemical reactions
Computational fluid dynamics
Convection
Differential equations
Diffusion
Fluid flow
Fluids
Heat transfer
Mathematical models
Porosity
Porous plate
Radiative heat
Runge-Kutta method
Soret and Dufour effects
Unsteady
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Summary:This study investigates the unsteady mixed convection flow past a vertical porous flat plate moving through a binary mixture in the presence of radiative heat transfer and nth-order Arrhenius type of irreversible chemical reaction by taking into account the diffusion-thermal (Dufour) and thermo-diffusion (Soret) effects. Assuming an optically thin radiating fluid and using a local similarity variable, the governing nonlinear partial differential equations have been transformed into a set of coupled nonlinear ordinary differential equations, which are solved numerically by applying shooting iteration technique together with fourth-order Runge-Kutta integration scheme. Graphical results for the dimensionless velocity, temperature, and concentration distributions are shown for various values of the thermophysical parameters controlling the flow regime. Finally, numerical values of physical quantities, such as the local skin-friction coefficient, the local Nusselt number, and the local Sherwood number are presented in tabular form.
ISSN:0098-6445
1563-5201
DOI:10.1080/00986445.2011.545296