Numerical simulation of nonlinear thermal radiation and homogeneous-heterogeneous reactions in convective flow by a variable thicked surface

The present work addresses flow in a non-Darcy porous medium. Flow is due to nonlinear stretching surface with variable thickness. Formulations consists of salient features of nonlinear thermal radiation, viscous dissipation, Joule heating and homogeneous-heterogeneous reactions. In whole analysis equal diffusions for reactants and autocatalyst are invoked. Resulting problems are numerically solved using built-in-shooting technique. Outcome of different thermophysical variables i.e., ratio of mass diffusion coefficient, radiation parameter, local inertia coefficient, inverse Darcy number, shape parameter, surface thickness parameter, Hartman number, Prandtl number, Biot number, strength of homogeneous reaction parameter, Eckert number, Schmidt number and strength of heterogeneous reaction parameter on the momentum, thermal and concentration distributions is investigated. Velocity is found to decay for higher estimation of Hartman number while thermal and concentration fields are enhanced for larger Eckert and Biot numbers. (C) 2017 Elsevier B.V. All rights reserved.