Effect of variable fluid properties on MHD mixed convection flow of second-grade fluid over a linear heated stretching sheet with a convective boundary condition (Q828407)

The aim of this paper is to study the effect of variable fluid properties on MHD mixed convection flow of a second-grade fluid flowing along an infinite stretching sheet with convective boundary conditions. The fluid is placed on an infinite heated elastic surface with linear stretching rate, and a vertical velocity component due to suction at the sheet is considered. The combined effects of inertia, viscous, visco-elastic, and magnetic forces are analyzed. The basic equations governing the flow, heat transfer, and mass transfer are reduced to a set of nonlinear ordinary differential equations by using appropriate similarity transformations for velocity, temperature and concentration. However, the results of this paper are, unfortunately, \textrm{wrong}. This is because the parameters: $Ha_x$, $Ec$ and $Bi_x$ should be constant, and not functions of the independent variable $x$. Thus, the partial differential equations (9) to (12) cannot be reduced to the ordinary (similarity) equations (20) to (22). Equations (9) to (12) should be solved numerically using finite-difference method, etc.