Stagnation-point flow and heat transfer of power-law MHD fluid over a stretching surface with convective heat transferboundary condition

Purpose This paper aims to discuss the stagnation-point flow and heat transfer for power-law fluid pass through a stretching surface with heat generation effect. Unlike the previous considerations about the research on stagnation-point flow, the process of heat transfer and the convective heat transfer boundary condition use the modified Fourier's law in which the heat flux is power-law-dependent on velocity gradient. Design/methodology/approach The similarly transformation is used to convert the governing partial differential equations into a series of ordinary differential equations which are solved analytically by using the differential transform method and the base function method. Findings The variations of the velocity and temperature fields for different specific related parameters are graphically discussed and analyzed. There is a special phenomenon that all the velocity profiles converge from the initial value of velocity to stagnation parameter values. And the larger power-law index enhancesthe momentum diffusion. A significant phenomenon can be observed that the larger power-law index causes a decline in the heat flux. This influence indicates that the higher viscosity restricts the heat transfer. Furthermore, both velocity gradient and temperature gradient play an indispensable role in the processes of heat transfer. Originality/value This paper researches the process of heat transfer of stagnation-point flow ofpower-law magneto-hydro-dynamical fluid over a stretching surface with modified convective heat transfer boundary condition.

Automated summary

This paper discusses the heat transfer process of stagnation-point flow of power-law magneto-hydro-dynamical fluid over a stretching surface with modified convective heat transfer boundary condition. The study found that higher viscosity restricts heat transfer and both velocity gradient and temperature gradient play an indispensable role in the heat transfer process. The velocity profiles converge to stagnation parameter values and larger power-law index enhances momentum diffusion while causing a decline in heat flux.