Comment on the paper "Impact of thermal radiation on MHD slip flow over a flat plate with variable fluid properties, by K. Das, Heat and Mass Transfer (2012) 48:767-778"

The transverse magnetic field is assumed as a function of the distance from the origin. Also it is assumed that the fluid viscosity and the thermal conductivity vary as an inverse function and linear function of temperature respectively. Using the similarity transformation, the governing system of nonlinear partial differential equations are transformed into similarity non-linear ordinary differential equations and are solved numerically using symbolic software. In addition, there is another problem in the paper. It is known in boundary layer theory that velocity and temperature profiles approach the ambient fluid conditions asymptotically and do not intersect the line which represents the boundary conditions. The numerical values obtained within the boundary layer for the dimensionless velocity, temperature, skin friction coefficient and the Nusselt number are presented through graphs and tables for several sets of values of the parameters.