A Double Diffusive Unsteady MHD Convective Flow Past a Flat Porous Plate Moving through a Binary Mixture with Suction or Injection

D R V S R K Sastry Sastry,A S N Murti

doi:10.1155/2013/935156

Abstract

The problem of unsteady magnetohydrodynamic convective flow with radiation and chemical reaction past a flat porous plate moving through a binary mixture in an optically thin environment is considered. The governing boundary layer equations are converted to nonlinear ordinary differential equations by similarity transformation and then solved numerically by MATLAB “bvp4c” routine. The velocity, temperature, and concentration profiles are presented graphically for various values of the material parameters. Also a numerical data for the local skin friction coefficient, the local Nusselt number, and local Sherwood number is presented in tabular forms.

Highlights

Combined heat and mass transfer problems with chemical reaction are of importance in many processes and have, received a considerable amount of attention in research
We have considered the Arrhenius kinetics and thermal radiation in an unsteady MHD convective flow over a moving plate through a binary mixture with suction or injection at the plate surface
To get a clear insight of the physical problem, we have assigned various numerical values to the parameters that are incorporated in the problem with which one can discuss the profiles of velocity, temperature, and concentration

Summary

Introduction

Combined heat and mass transfer problems with chemical reaction are of importance in many processes and have, received a considerable amount of attention in research. Kim [15] studied unsteady MHD convective heat transfer past a semi-infinite vertical porous moving plate He found that an increase in the Prandtl number and magnetic field intensity decreases the fluid velocity. Alam et al [17] studied the problem of free convection heat and mass transfer flow past an inclined semi-infinite heated surface of an electrically conducting and steady viscous incompressible fluid in the presence of a magnetic field and heat generation. More recently Makinde and Olanrewaju [20] have studied the effects of chemical reaction and radiative heat transfer for an unsteady convection flow past porous plate moving through a binary mixture. The skin friction, heat transfer, and mass transfer are displayed in tabular forms for different parameters

Mathematical Formulation

Results and Discussion

Conclusion