Heat and mass transfer in non-Newtonian nanofluids over a non-isothermal stretching wall

Abstract

A boundary layer analysis has been presented for the heat and mass transfer in non-Newtonian nanofluids over a stretching surface with prescribed wall temperature and surface nanoparticle concentration. A power-law model is used for non-Newtonian fluids whereas Brownian motion and thermophoresis effects are incorporated in the nanofluid model. A similarity transformation is used to reduce mass, momentum, thermal energy, and nanoparticles concentration equations into non-linear ordinary differential equations which are solved numerically by using a finite difference method. Effects of nanofluid parameters, suction/injection and temperature parameters, and generalized Pr and Le numbers on dimensionless functions, skin friction, local Nusselt and Sherwood numbers are shown graphically. The present results of skin friction and heat transfer rates are compared with published results for special cases and are found to be in good agreement.

Keywords

Non-Newtonian nanofluids power-law model Brownian motion thermophoresis skin friction local Nusselt and Sherwood numbers stretching surface

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