Thermal Radiation Effects on Magnetohydrodynamic Boundary-Layer Flow Due to a Moving Extensible Surface in Nanofluids

Effects of the thermal radiation and variable transverse magnetic field on the heat transfer to nanofluids over a steady non-linearly stretching sheet using different types of nanoparticles (metallic or nonmetallic) as Copper (Cu), Alumina (Al2O3), and Titania Oxide (TiO2) in the base fluid of water is investigated. The governing system of partial differential equations is firstly transformed into a system of ordinary equations, before being solved numerically by Chebyshev pseudospectral differentiation matrix (ChPDM). Results of the skin friction coefficient and local Nusselt number as well as the velocity and temperature profiles are discussed. It is found that both velocity and temperature profiles increase with increasing the solid volume fraction as well as the velocity distribution decreases whereas the temperature distribution increases with increasing velocity power index and magnetic parameter. However, it decreases with increasing the radiation parameter.