Numerical study of homogeneous-heterogeneous reactions on stagnation point flow of ferrofluid with non-linear slip condition

This study deals with the stagnation point flow of ferrofluid over a flat plate with non-linear slip boundary condition in the presence of homogeneous-heterogeneous reactions. Three kinds of ferroparticles, namely, magnetite (Fe3O4), cobalt ferrite (CoFe2O4) and manganese zinc ferrite (Mn-ZnFe2O4) are taken into account with water and kerosene as conventional base fluids. The developed model of homogeneous-heterogeneous reactions in boundary layer flow with equal and unequal diffusivities for reactant and autocatalysis is considered. The governing partial differential equations are converted into system of non-linear ordinary differential equations by mean of similarity transformations. These ordinary differential equations are integrated numerically using shooting method. The effects of pertinent parameters on velocity and concentration profiles are presented graphically and discussed. We found that in the presence of Fe3O4-kerosene and CoFe2O4-kerosene, velocity profiles increase for large values of alpha and beta whereas there is a decrement in concentration profiles with increasing values of K and K-s. Furthermore, the comparison between non-magnetic (Al2O3) and magnetic Fe3O4 nanoparticles is given in tabular form. (C) 2016 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.