International Journal of Heat and Mass Transfer, Vol.92, 1090-1105, 2016
Heat and mass transfer on MHD mixed convection axisymmetric chemically reactive flow of Maxwell fluid driven by exothermal and isothermal stretching disks
The aim of present analysis is to investigate the effects of heat source/sink, chemical and material composition on steady MHD mixed convection axisymmetric flow of an incompressible Maxwell fluid between two infinite stretching disks in the presence of viscous dissipation and Joule heating. The lower disk is subjected to an exothermic surface reaction, while an upper disk is maintained at uniform temperature and concentration. Also an exothermal surface reaction modeled by Arrhenius kinetics supplied heat to the Maxwell fluid. Similarity transformations are used for simplifying equations governing the flow, thermal fields, material and chemical composition fields. The analytic solution of dimensionless governing ordinary differential equations is successfully obtained using homotopy analysis method (HAM). Here, convergence of the derived series solution is ensured. We mainly focus on the effects of Hartmann number, Archimedes number, Eckert number, Prandd number, heat generation or absorption parameter, activation energy parameter, chemical reaction parameter on dimensionless velocity, pressure, temperature and concentration distribution. The results with several values of the problem parameters are expressed graphically. To understand the behavior of flow between stretching isothermal and exothermal disks, the values of skin friction coefficient, Nusselt number and Sherwood number are tabulated for both lower and upper disks. Further, the critical value of Frank-Kamenetskii are presented through graphs and tables and discussed for different values of parameters involved in problem. (C) 2015 Elsevier Ltd. All rights reserved.